feat(call recording): chuked recoding upload

- upload recording of call in chunks 
- recordings are merged on server side in jobs
- improve UI of the recording tab

app/Actions/Interview/FinalizeRecordingAction.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Actions\Interview;
+
+use App\Jobs\MergeRecordingChunksJob;
+use App\Models\Interview;
+
+class FinalizeRecordingAction
+{
+    /**
+     * Finalize the recording session by dispatching the background merge job.
+     *
+     * @param Interview $interview
+     * @param string $sessionId
+     * @param int $totalChunks
+     * @param string|null $tempDir
+     * @param string|null $folderName
+     * @param int|null $duration
+     * @return void
+     */
+    public function execute(
+        Interview $interview,
+        string $sessionId,
+        int $totalChunks = 0,
+        ?string $tempDir = null,
+        ?string $folderName = null,
+        ?int $duration = null
+    ): void {
+        MergeRecordingChunksJob::dispatch(
+            $interview->id,
+            $sessionId,
+            $tempDir,
+            $folderName,
+            $totalChunks,
+            $duration
+        );
+    }
+}

app/Actions/Interview/MergeRecordingChunksAction.php

@@ -0,0 +1,201 @@
+<?php
+
+namespace App\Actions\Interview;
+
+use App\Models\Interview;
+use Illuminate\Support\Facades\Log;
+use RuntimeException;
+
+class MergeRecordingChunksAction
+{
+    /**
+     * Execute the heavy stream merge of recording chunk parts into a single video file.
+     *
+     * @param Interview $interview
+     * @param string $sessionId
+     * @param string|null $tempDir
+     * @param string|null $folderName
+     * @param int|null $duration
+     * @return string|null The relative path to the merged recording file, or null on failure.
+     */
+    public function execute(
+        Interview $interview,
+        string $sessionId,
+        ?string $tempDir = null,
+        ?string $folderName = null,
+        ?int $duration = null
+    ): ?string {
+        $safeSessionId = preg_replace('/[^a-zA-Z0-9_\-]/', '', $sessionId);
+        $tempBase = config('interview.recordings.temp_folder', 'app/temp_recordings');
+        $resolvedTempDir = $tempDir ?: storage_path(trim($tempBase, '/') . '/' . $safeSessionId);
+
+        if (!is_dir($resolvedTempDir)) {
+            Log::warning('[MergeRecordingChunksAction] Temporary chunk directory not found', [
+                'session_id' => $sessionId,
+                'temp_dir' => $resolvedTempDir,
+            ]);
+            return null;
+        }
+
+        $parts = $this->findAndSortParts($resolvedTempDir);
+        if (empty($parts)) {
+            Log::warning('[MergeRecordingChunksAction] No chunk parts found to merge', [
+                'session_id' => $sessionId,
+                'temp_dir' => $resolvedTempDir,
+            ]);
+            return null;
+        }
+
+        // Validate that part_000000.webm exists and starts with valid EBML container header
+        $firstPart = $parts[0];
+        $headerCheck = @file_get_contents($firstPart, false, null, 0, 4);
+        if ($headerCheck === false || !str_starts_with($headerCheck, "\x1a\x45\xdf\xa3")) {
+            Log::error('[MergeRecordingChunksAction] First chunk missing EBML container header. Possible incomplete initial chunk upload.', [
+                'session_id' => $sessionId,
+                'first_part' => $firstPart,
+                'header_hex' => $headerCheck ? bin2hex($headerCheck) : 'null',
+            ]);
+            return null;
+        }
+
+        $baseFolder = config('interview.recordings.base_folder', 'uploads/candidate_recordings');
+        $uniqueFolder = $folderName ?: ($interview->submission_unique_id ?: (string) $interview->id);
+        $subDir = trim($baseFolder, '/') . '/' . $uniqueFolder;
+        $destinationDir = public_path($subDir);
+
+        $this->ensureDestinationDirectory($destinationDir);
+
+        $filename = 'recording_' . time() . '.webm';
+        $finalPath = $destinationDir . DIRECTORY_SEPARATOR . $filename;
+
+        $this->streamMergeFiles($parts, $finalPath);
+
+        if (!file_exists($finalPath) || filesize($finalPath) === 0) {
+            Log::error('[MergeRecordingChunksAction] Output recording file is empty or was not created', [
+                'final_path' => $finalPath,
+                'session_id' => $sessionId,
+            ]);
+            return null;
+        }
+
+        $relativePath = '/' . $subDir . '/' . $filename;
+        $url = asset($subDir . '/' . $filename);
+
+        $this->updateInterviewRecordings($interview, $relativePath, $url, $filename, $duration);
+
+        $this->cleanupTempParts($parts, $resolvedTempDir);
+
+        Log::info('[MergeRecordingChunksAction] Recording assembled successfully', [
+            'interview_id' => $interview->id,
+            'session_id' => $sessionId,
+            'total_parts' => count($parts),
+            'duration' => $duration,
+            'path' => $relativePath,
+        ]);
+
+        return $relativePath;
+    }
+
+    /**
+     * Locate and sort chunk part files in ascending numerical order.
+     *
+     * @param string $tempDir
+     * @return array<string>
+     */
+    private function findAndSortParts(string $tempDir): array
+    {
+        $parts = glob($tempDir . DIRECTORY_SEPARATOR . 'part_*.webm') ?: [];
+        natsort($parts);
+        return array_values($parts);
+    }
+
+    /**
+     * Ensure that the destination directory exists and is writable.
+     *
+     * @param string $dir
+     * @return void
+     */
+    private function ensureDestinationDirectory(string $dir): void
+    {
+        if (!is_dir($dir)) {
+            if (!mkdir($dir, 0755, true) && !is_dir($dir)) {
+                throw new RuntimeException("Failed to create destination directory: {$dir}");
+            }
+        }
+    }
+
+    /**
+     * Stream merge multiple binary chunk files into a single destination file.
+     *
+     * @param array<string> $parts
+     * @param string $finalPath
+     * @return void
+     */
+    private function streamMergeFiles(array $parts, string $finalPath): void
+    {
+        $out = fopen($finalPath, 'wb');
+        if ($out === false) {
+            throw new RuntimeException("Cannot open destination file for writing: {$finalPath}");
+        }
+
+        try {
+            foreach ($parts as $partFile) {
+                $in = fopen($partFile, 'rb');
+                if ($in === false) {
+                    Log::warning("[MergeRecordingChunksAction] Could not read part: {$partFile}");
+                    continue;
+                }
+                stream_copy_to_stream($in, $out);
+                fclose($in);
+            }
+        } finally {
+            fclose($out);
+        }
+    }
+
+    /**
+     * Update the interview model with the newly merged recording metadata.
+     *
+     * @param Interview $interview
+     * @param string $relativePath
+     * @param string $url
+     * @param string $filename
+     * @param int|null $duration
+     * @return void
+     */
+    private function updateInterviewRecordings(Interview $interview, string $relativePath, string $url, string $filename, ?int $duration = null): void
+    {
+        $recordings = $interview->recordings ?? [];
+        if (!is_array($recordings)) {
+            $recordings = $interview->recording_path ? [$interview->recording_path] : [];
+        }
+
+        $recordings[] = [
+            'url' => $relativePath,
+            'full_url' => $url,
+            'filename' => $filename,
+            'created_at' => now()->toIso8601String(),
+            'duration' => $duration ?: 0,
+        ];
+
+        $interview->update([
+            'recording_path' => $relativePath,
+            'recordings' => $recordings,
+        ]);
+    }
+
+    /**
+     * Clean up temporary parts and remove the session directory.
+     *
+     * @param array<string> $parts
+     * @param string $tempDir
+     * @return void
+     */
+    private function cleanupTempParts(array $parts, string $tempDir): void
+    {
+        foreach ($parts as $partFile) {
+            @unlink($partFile);
+        }
+        @rmdir($tempDir);
+    }
+}

app/Actions/Interview/StoreRecordingChunkAction.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Actions\Interview;
+
+use App\Models\Interview;
+use Illuminate\Http\UploadedFile;
+
+class StoreRecordingChunkAction
+{
+    /**
+     * Store an individual video recording chunk in a temporary session directory.
+     *
+     * @param Interview $interview
+     * @param string $sessionId
+     * @param int $chunkIndex
+     * @param UploadedFile $file
+     * @return string
+     */
+    public function execute(Interview $interview, string $sessionId, int $chunkIndex, UploadedFile $file): string
+    {
+        $safeSessionId = preg_replace('/[^a-zA-Z0-9_\-]/', '', $sessionId);
+        $tempBase = config('interview.recordings.temp_folder', 'app/temp_recordings');
+        $tempDir = storage_path(trim($tempBase, '/') . '/' . $safeSessionId);
+
+        if (!file_exists($tempDir)) {
+            mkdir($tempDir, 0777, true);
+        }
+
+        $partName = sprintf('part_%06d.webm', $chunkIndex);
+        $file->move($tempDir, $partName);
+
+        return $tempDir . DIRECTORY_SEPARATOR . $partName;
+    }
+}

app/Http/Controllers/InterviewController.php

@@ -2,6 +2,11 @@
 
 namespace App\Http\Controllers;
 
+use App\Actions\Interview\FinalizeRecordingAction;
+use App\Actions\Interview\StoreRecordingChunkAction;
+use App\Http\Requests\Interview\UploadRecordingChunkRequest;
+use App\Http\Responses\Interview\RecordingChunkReceivedResponse;
+use App\Http\Responses\Interview\RecordingFinalizedResponse;
 use App\Models\Interview;
 use App\Models\InterviewWarning;
 use App\Models\User;
@@ -587,6 +592,7 @@ private function getFormattedRecordings($interview)
             $rec['stream_url'] = $streamUrl;
             $rec['download_url'] = route('interview.download-recording', $interview->id) . '?index=' . $idx;
             $rec['mime_type'] = $mimeType;
+            $rec['duration'] = isset($rec['duration']) ? (int) $rec['duration'] : 0;
             $formatted[] = $rec;
         }
 
@@ -945,49 +951,117 @@ public function toggleTabScreenshot(Request $request, $id)
      */
     public function uploadRecording(Request $request, $id)
     {
-        $interview = Interview::where('id', $id)
+        try {
-            ->orWhere('submission_unique_id', $id)
+            $interview = Interview::where('id', $id)
-            ->firstOrFail();
+                ->orWhere('submission_unique_id', $id)
+                ->first();
 
-        if ($request->hasFile('video')) {
+            if (!$interview) {
-            $file = $request->file('video');
+                return response()->json(['success' => false, 'message' => 'Interview session not found.'], 404);
-            $ext = strtolower($file->getClientOriginalExtension() ?: 'webm');
-            if (!in_array($ext, ['mp4', 'webm', 'm4v', 'mov'])) {
-                $ext = 'webm';
             }
 
-            $uniqueFolder = $interview->submission_unique_id ?: $interview->id;
+            if ($request->hasFile('video')) {
-            $subDir = 'uploads/candidate_recordings/' . $uniqueFolder;
+                $file = $request->file('video');
-            $destinationPath = public_path($subDir);
+                $ext = strtolower($file->getClientOriginalExtension() ?: 'webm');
-            if (!file_exists($destinationPath)) {
+                if (!in_array($ext, ['mp4', 'webm', 'm4v', 'mov'])) {
-                mkdir($destinationPath, 0777, true);
+                    $ext = 'webm';
+                }
+
+                $baseFolder = config('interview.recordings.base_folder', 'uploads/candidate_recordings');
+                $uniqueFolder = $interview->submission_unique_id ?: $interview->id;
+                $subDir = trim($baseFolder, '/') . '/' . $uniqueFolder;
+                $destinationPath = public_path($subDir);
+                if (!file_exists($destinationPath)) {
+                    mkdir($destinationPath, 0777, true);
+                }
+
+                $filename = 'recording_' . time() . '.' . $ext;
+                $file->move($destinationPath, $filename);
+                $url = asset($subDir . '/' . $filename);
+                $relativePath = '/' . $subDir . '/' . $filename;
+
+                $recordings = $interview->recordings ?? [];
+                if (!is_array($recordings)) {
+                    $recordings = $interview->recording_path ? [$interview->recording_path] : [];
+                }
+                $recordings[] = [
+                    'url' => $relativePath,
+                    'full_url' => $url,
+                    'filename' => $filename,
+                    'created_at' => now()->toIso8601String(),
+                ];
+
+                $interview->update([
+                    'recording_path' => $relativePath,
+                    'recordings' => $recordings,
+                ]);
+
+                return response()->json(['success' => true, 'path' => $relativePath, 'url' => $url, 'recordings' => $recordings]);
             }
 
-            $filename = 'recording_' . time() . '.' . $ext;
+            return response()->json(['success' => false, 'message' => 'No video payload received (file may exceed server upload size limit).'], 422);
-            $file->move($destinationPath, $filename);
+        } catch (\Throwable $e) {
-            $url = asset($subDir . '/' . $filename);
+            \Log::error('Recording upload failed: ' . $e->getMessage());
-            $relativePath = '/' . $subDir . '/' . $filename;
+            return response()->json(['success' => false, 'message' => 'Server error saving recording: ' . $e->getMessage()], 500);
+        }
+    }
 
-            $recordings = $interview->recordings ?? [];
+    /**
-            if (!is_array($recordings)) {
+     * Handle live chunked video recording upload from the interviewer proctoring session.
-                $recordings = $interview->recording_path ? [$interview->recording_path] : [];
+     *
+     * @param UploadRecordingChunkRequest $request
+     * @param int|string $id
+     * @param StoreRecordingChunkAction $storeChunkAction
+     * @param FinalizeRecordingAction $finalizeRecordingAction
+     * @return \Illuminate\Http\JsonResponse|\Illuminate\Contracts\Support\Responsable
+     */
+    public function uploadRecordingChunk(
+        UploadRecordingChunkRequest $request,
+        $id,
+        StoreRecordingChunkAction $storeChunkAction,
+        FinalizeRecordingAction $finalizeRecordingAction
+    ) {
+        try {
+            $interview = Interview::where('id', $id)
+                ->orWhere('submission_unique_id', $id)
+                ->first();
+
+            if (!$interview) {
+                return response()->json(['success' => false, 'message' => 'Interview session not found.'], 404);
             }
-            $recordings[] = [
-                'url' => $relativePath,
-                'full_url' => $url,
-                'filename' => $filename,
-                'created_at' => now()->toIso8601String(),
-            ];
 
-            $interview->update([
+            $validated = $request->validated();
-                'recording_path' => $relativePath,
+            $sessionId = $validated['session_id'];
-                'recordings' => $recordings,
+            $chunkIndex = (int) $validated['chunk_index'];
+            $isFinal = filter_var($validated['is_final'] ?? false, FILTER_VALIDATE_BOOLEAN);
+
+            if ($request->hasFile('chunk')) {
+                $file = $request->file('chunk');
+                $storeChunkAction->execute($interview, $sessionId, $chunkIndex, $file);
+            }
+
+            if ($isFinal) {
+                $totalChunks = (int) ($validated['total_chunks'] ?? ($chunkIndex + 1));
+                $duration = isset($validated['duration']) ? (int) $validated['duration'] : null;
+                $finalizeRecordingAction->execute($interview, $sessionId, $totalChunks, null, null, $duration);
+
+                return new RecordingFinalizedResponse($sessionId);
+            }
+
+            return new RecordingChunkReceivedResponse($sessionId, $chunkIndex);
+        } catch (\Throwable $e) {
+            \Log::error('Recording chunk upload failed: ' . $e->getMessage(), [
+                'id' => $id,
+                'session_id' => $request->input('session_id'),
+                'chunk_index' => $request->input('chunk_index'),
+                'trace' => $e->getTraceAsString(),
             ]);
 
-            return response()->json(['success' => true, 'path' => $relativePath, 'url' => $url, 'recordings' => $recordings]);
+            return response()->json([
+                'success' => false,
+                'message' => 'Error processing recording chunk: ' . $e->getMessage()
+            ], 500);
         }
-
-        return response()->json(['success' => false, 'message' => 'No video payload received']);
     }
 
     /**

app/Http/Requests/Interview/UploadRecordingChunkRequest.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Http\Requests\Interview;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class UploadRecordingChunkRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'session_id' => ['required', 'string', 'max:255'],
+            'chunk_index' => ['required', 'integer', 'min:0'],
+            'is_final' => ['nullable', 'boolean'],
+            'total_chunks' => ['nullable', 'integer', 'min:0'],
+            'duration' => ['nullable', 'integer', 'min:0'],
+            'chunk' => ['nullable', 'file', 'max:25600'], // 25MB max per chunk
+        ];
+    }
+
+    /**
+     * Get custom messages for validator errors.
+     *
+     * @return array<string, string>
+     */
+    public function messages(): array
+    {
+        return [
+            'session_id.required' => 'A valid recording session identifier is required.',
+            'chunk_index.required' => 'Chunk index must be provided.',
+        ];
+    }
+}

app/Http/Responses/Interview/RecordingChunkReceivedResponse.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Http\Responses\Interview;
+
+use Illuminate\Contracts\Support\Responsable;
+use Illuminate\Http\JsonResponse;
+
+class RecordingChunkReceivedResponse implements Responsable
+{
+    /**
+     * Create a new response instance.
+     *
+     * @param string $sessionId
+     * @param int $chunkIndex
+     */
+    public function __construct(
+        protected string $sessionId,
+        protected int $chunkIndex
+    ) {}
+
+    /**
+     * Create an HTTP response that represents the object.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @return \Illuminate\Http\JsonResponse
+     */
+    public function toResponse($request): JsonResponse
+    {
+        return response()->json([
+            'success' => true,
+            'chunk_index' => $this->chunkIndex,
+            'is_final' => false,
+            'session_id' => $this->sessionId,
+        ], 200);
+    }
+}

app/Http/Responses/Interview/RecordingFinalizedResponse.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Http\Responses\Interview;
+
+use Illuminate\Contracts\Support\Responsable;
+use Illuminate\Http\JsonResponse;
+
+class RecordingFinalizedResponse implements Responsable
+{
+    /**
+     * Create a new response instance.
+     *
+     * @param string $sessionId
+     * @param string $message
+     */
+    public function __construct(
+        protected string $sessionId,
+        protected string $message = 'Final recording chunk received. Video assembly queued in background.'
+    ) {}
+
+    /**
+     * Create an HTTP response that represents the object.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @return \Illuminate\Http\JsonResponse
+     */
+    public function toResponse($request): JsonResponse
+    {
+        return response()->json([
+            'success' => true,
+            'is_final' => true,
+            'processing' => true,
+            'session_id' => $this->sessionId,
+            'message' => $this->message,
+        ], 200);
+    }
+}

app/Jobs/MergeRecordingChunksJob.php

@@ -0,0 +1,98 @@
+<?php
+
+namespace App\Jobs;
+
+use App\Actions\Interview\MergeRecordingChunksAction;
+use App\Models\Interview;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldBeUnique;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Foundation\Bus\Dispatchable;
+use Illuminate\Queue\Attributes\Backoff;
+use Illuminate\Queue\Attributes\Timeout;
+use Illuminate\Queue\Attributes\Tries;
+use Illuminate\Queue\Attributes\UniqueFor;
+use Illuminate\Queue\Attributes\WithoutRelations;
+use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Queue\SerializesModels;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Facades\Log;
+use Throwable;
+
+#[Timeout(300)]
+#[Tries(3)]
+#[Backoff(5, 15, 30)]
+#[UniqueFor(1800)]
+#[WithoutRelations]
+class MergeRecordingChunksJob implements ShouldQueue, ShouldBeUnique
+{
+    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
+
+    /**
+     * Create a new job instance.
+     *
+     * @param int|string $interviewId
+     * @param string $sessionId
+     * @param string|null $tempDir
+     * @param string|null $folderName
+     * @param int $totalChunks
+     * @param int|null $duration
+     */
+    public function __construct(
+        public int|string $interviewId,
+        public string $sessionId,
+        public ?string $tempDir = null,
+        public ?string $folderName = null,
+        public int $totalChunks = 0,
+        public ?int $duration = null
+    ) {}
+
+    /**
+     * The unique ID of the job.
+     */
+    public function uniqueId(): string
+    {
+        return 'merge_rec_' . $this->interviewId . '_' . $this->sessionId;
+    }
+
+    /**
+     * Execute the job.
+     */
+    public function handle(MergeRecordingChunksAction $mergeAction): void
+    {
+        Cache::lock('interview_merge_lock_' . $this->interviewId, 60)->block(15, function () use ($mergeAction) {
+            $interview = Interview::where('id', $this->interviewId)
+                ->orWhere('submission_unique_id', $this->interviewId)
+                ->first();
+
+            if (!$interview) {
+                Log::warning('[MergeRecordingChunksJob] Interview not found', [
+                    'interview_id' => $this->interviewId,
+                    'session_id' => $this->sessionId,
+                ]);
+                return;
+            }
+
+            $mergeAction->execute(
+                $interview,
+                $this->sessionId,
+                $this->tempDir,
+                $this->folderName,
+                $this->duration
+            );
+        });
+    }
+
+    /**
+     * Handle a job failure.
+     */
+    public function failed(?Throwable $exception): void
+    {
+        Log::error('[MergeRecordingChunksJob] Recording merge job failed', [
+            'interview_id' => $this->interviewId,
+            'session_id' => $this->sessionId,
+            'error' => $exception?->getMessage(),
+            'trace' => $exception?->getTraceAsString(),
+        ]);
+    }
+}

config/interview.php

@@ -7,5 +7,18 @@
     |--------------------------------------------------------------------------
     |
     */
-    'max_interviewer' => (int) env('MAX_INTERVIEWER', 2)
+    'max_interviewer' => (int) env('MAX_INTERVIEWER', 2),
+
+    /*
+    |--------------------------------------------------------------------------
+    | Candidate Recordings Storage Configuration
+    |--------------------------------------------------------------------------
+    |
+    | Base folder and temporary chunk storage locations for session recordings.
+    |
+    */
+    'recordings' => [
+        'base_folder' => env('INTERVIEW_RECORDINGS_FOLDER', 'uploads/candidate_recordings'),
+        'temp_folder' => env('INTERVIEW_RECORDINGS_TEMP_FOLDER', 'app/temp_recordings'),
+    ],
 ];

resources/js/candidate-proctor.js

@@ -446,19 +446,18 @@ export function broadcastCandidateScreenStream(stream) {
 
     const targetPeerIds = new Set();
 
-    // Collect dedicated screen receiver targets from active interviewers
+    // Collect dedicated screen receiver targets and main interviewer peers
     if (typeof window.latestActivePeers !== 'undefined' && Array.isArray(window.latestActivePeers)) {
         window.latestActivePeers.forEach(p => {
             if (p.peer_id && (p.peer_id.startsWith('interviewer_') || p.role === 'admin' || p.role === 'interviewer')) {
                 const screenTargetId = p.peer_id.replace('interviewer_', 'interviewer_screen_');
                 targetPeerIds.add(screenTargetId);
+                targetPeerIds.add(p.peer_id);
             }
         });
     }
 
-    if (targetPeerIds.size === 0) {
+    targetPeerIds.add(legacyScreenPeerId);
-        targetPeerIds.add(legacyScreenPeerId);
-    }
 
     const makeCalls = (peer) => {
         targetPeerIds.forEach(targetId => {

resources/js/interview-call.js

@@ -6,6 +6,7 @@
 
 import { initMeteredIceServers } from './metered.js';
 import { globalAudioMonitor, AudioActivityMonitor, SPEAKING_ACTIVE_CLASSES } from './audio-monitor.js';
+import { RecordingCompositor } from './recording-compositor.js';
 
 // --- Global Audio Ringtone Synthesizer Engine ---
 export class CallRingtoneEngine {
@@ -982,6 +983,77 @@ export function pollReviewData() {
                     recList = [{ url: recPath, created_at: new Date().toISOString(), original_index: 0 }];
                 }
 
+                // Auto-clear one-time processing notice if new recordings arrived
+                if (isRecordingProcessing && recList.length > recordingKnownCountBeforeProcessing) {
+                    isRecordingProcessing = false;
+                    recordingProcessingSessionId = null;
+                }
+
+                let processingBannerHtml = '';
+                if (isRecordingProcessing) {
+                    processingBannerHtml = `
+                    <div id="recording-processing-banner" class="bg-indigo-500/10 border border-indigo-500/30 text-indigo-200 text-xs rounded-xl p-3.5 mb-2.5 flex items-start gap-2.5 shadow-sm">
+                        <i class="fa-solid fa-circle-notch fa-spin text-indigo-400 mt-0.5 text-sm shrink-0"></i>
+                        <div class="flex-1 min-w-0">
+                            <strong class="text-white text-xs block">Processing Call Recording&hellip;</strong>
+                            <div class="text-[11px] text-indigo-300/80 mt-0.5">Your video recording is currently being assembled on the server. It will appear here shortly with a download link once ready.</div>
+                        </div>
+                        <button type="button" onclick="window.dismissRecordingProcessingBanner && window.dismissRecordingProcessingBanner()" class="text-indigo-400 hover:text-white text-sm shrink-0 leading-none">&times;</button>
+                    </div>`;
+                }
+
+function formatDurationBadgeText(sec) {
+    if (!sec || isNaN(sec) || sec <= 0) return null;
+    const m = Math.floor(sec / 60);
+    const s = Math.round(sec % 60);
+    return m > 0 ? `${m}m ${String(s).padStart(2, '0')}s` : `${s}s`;
+}
+
+function resolveMediaDuration(videoUrl, badgeElementId, fallbackDuration = 0) {
+    const el = document.getElementById(badgeElementId);
+    if (!el) return;
+
+    if (fallbackDuration && fallbackDuration > 0) {
+        const text = formatDurationBadgeText(fallbackDuration);
+        if (text) {
+            el.innerHTML = `<i class="fa-regular fa-clock text-[9px]"></i> ${text}`;
+            el.style.display = 'inline-flex';
+            return;
+        }
+    }
+
+    if (!videoUrl) return;
+
+    const v = document.createElement('video');
+    v.preload = 'metadata';
+    v.src = videoUrl;
+
+    const applyDuration = (d) => {
+        if (!d || isNaN(d) || d <= 0) return;
+        const text = formatDurationBadgeText(d);
+        const targetEl = document.getElementById(badgeElementId);
+        if (text && targetEl) {
+            targetEl.innerHTML = `<i class="fa-regular fa-clock text-[9px]"></i> ${text}`;
+            targetEl.style.display = 'inline-flex';
+        }
+    };
+
+    v.onloadedmetadata = function() {
+        if (v.duration && !isNaN(v.duration) && v.duration !== Infinity && v.duration > 0) {
+            applyDuration(v.duration);
+        } else {
+            // Workaround for WebM streaming containers where duration is Infinity until seeked
+            v.currentTime = 1e101;
+            v.ontimeupdate = function() {
+                v.ontimeupdate = null;
+                if (v.currentTime && !isNaN(v.currentTime) && v.currentTime > 0) {
+                    applyDuration(v.currentTime);
+                }
+            };
+        }
+    };
+}
+
                 if (recList.length > 0) {
                     recList.sort((a, b) => {
                         const timeA = a.created_at ? new Date(a.created_at).getTime() : 0;
@@ -989,12 +1061,11 @@ export function pollReviewData() {
                         return timeB - timeA;
                     });
 
-                    let recHtml = `<div class="text-xs text-sky-400 font-bold mb-2.5 flex justify-between items-center">
+                    let recHtml = processingBannerHtml + `<div class="space-y-2">`;
-                        <span>📹 Stored Video Sessions (${recList.length} recording${recList.length > 1 ? 's' : ''})</span>
-                        <span class="text-[0.65rem] text-slate-400">📜 Scroll to view older recordings</span>
-                    </div>`;
 
                     recList.forEach((r, displayIdx) => {
+                        const recNum = recList.length - displayIdx;
+                        const origIdx = (typeof r === 'object' && r.original_index !== undefined) ? r.original_index : displayIdx;
                         let videoUrl = typeof r === 'string' ? r : (r.stream_url || r.url || recPath);
                         if (videoUrl && !videoUrl.startsWith('http') && !videoUrl.startsWith('/')) {
                             videoUrl = '/' + videoUrl;
@@ -1002,32 +1073,84 @@ export function pollReviewData() {
                         if (videoUrl && videoUrl.includes('/storage/')) {
                             videoUrl = videoUrl.replace('/storage/', '/media-stream/');
                         }
-                        const origIdx = (typeof r === 'object' && r.original_index !== undefined) ? r.original_index : displayIdx;
                         const dateObj = (r && r.created_at) ? new Date(r.created_at) : new Date();
-                        const dateStr = dateObj.toLocaleDateString() + ' ' + dateObj.toLocaleTimeString();
+                        const dateFormatted = dateObj.toLocaleDateString(undefined, {
+                            month: 'short',
+                            day: 'numeric',
+                            year: 'numeric'
+                        });
+                        const timeFormatted = dateObj.toLocaleTimeString(undefined, {
+                            hour: '2-digit',
+                            minute: '2-digit',
+                            second: '2-digit',
+                            hour12: true
+                        });
                         const downloadUrl = (typeof r === 'object' && r.download_url) ? r.download_url : (`/interviews/${currentInterviewId}/download-recording?index=${origIdx}`);
-                        const mimeType = (typeof r === 'object' && r.mime_type) ? r.mime_type : ((videoUrl && videoUrl.includes('.mp4')) ? 'video/mp4' : 'video/webm');
+                        const badgeId = `rec-duration-badge-${origIdx}-${displayIdx}`;
+                        const initialDuration = (r && r.duration && r.duration > 0) ? r.duration : 0;
+                        const initialDurationText = formatDurationBadgeText(initialDuration);
 
-                        recHtml += `<div class="bg-white/5 border border-slate-700/60 rounded-xl p-3 mb-3">
+                        recHtml += `
-                            <div class="flex justify-between items-center mb-2">
+                        <div class="recording-card group bg-slate-900/80 hover:bg-slate-900 border border-slate-800 hover:border-slate-700/80 rounded-xl p-3 flex items-center justify-between gap-3 transition-all shadow-sm">
-                                <div>
+                            <div class="flex items-center gap-3 min-w-0">
-                                    <strong class="text-white text-xs">📹 Session Recording #${recList.length - displayIdx}</strong>
+                                <div class="w-9 h-9 rounded-lg bg-indigo-500/10 border border-indigo-500/20 text-indigo-400 flex items-center justify-center shrink-0 group-hover:scale-105 transition-transform">
-                                    <span class="text-[0.7rem] text-slate-400 ml-2">📅 ${dateStr}</span>
+                                    <i class="fa-solid fa-video text-xs"></i>
                                 </div>
-                                <a href="${downloadUrl}" target="_blank" download class="bg-emerald-600 hover:bg-emerald-500 text-white font-bold text-xs px-3 py-1 rounded-md text-decoration-none inline-flex items-center gap-1">
+                                <div class="min-w-0">
-                                    📥 Download Video
+                                    <div class="flex items-center gap-2 flex-wrap">
+                                        <span class="text-xs font-semibold text-slate-100">Recording #${recNum}</span>
+                                        <span id="${badgeId}" class="${initialDurationText ? 'inline-flex' : 'hidden'} items-center gap-1 text-[10px] font-semibold px-2 py-0.5 rounded-md bg-indigo-500/10 text-indigo-300 border border-indigo-500/20">
+                                            <i class="fa-regular fa-clock text-[9px]"></i> ${initialDurationText || ''}
+                                        </span>
+                                        <span class="text-[9.5px] font-medium px-1.5 py-0.5 rounded bg-slate-800 text-slate-400 border border-slate-700/50">WebM</span>
+                                    </div>
+                                    <div class="flex items-center gap-2 text-[11px] text-slate-400 mt-0.5">
+                                        <span class="inline-flex items-center gap-1 text-slate-400">
+                                            <i class="fa-regular fa-calendar text-[10px] text-slate-500"></i>
+                                            ${dateFormatted}
+                                        </span>
+                                        <span class="text-slate-600 font-bold">•</span>
+                                        <span class="inline-flex items-center gap-1 text-slate-400">
+                                            <i class="fa-regular fa-clock text-[10px] text-slate-500"></i>
+                                            ${timeFormatted}
+                                        </span>
+                                    </div>
+                                </div>
+                            </div>
+                            <div class="shrink-0">
+                                <a href="${downloadUrl}" target="_blank" download class="inline-flex items-center gap-1.5 px-3 py-1.5 text-xs font-semibold text-emerald-300 bg-emerald-500/10 hover:bg-emerald-500/20 border border-emerald-500/30 hover:border-emerald-500/50 rounded-lg transition-all shadow-sm hover:shadow-emerald-950/40">
+                                    <i class="fa-solid fa-arrow-down-to-bracket text-xs"></i>
+                                    <span>Download</span>
                                 </a>
                             </div>
-                            <video controls preload="metadata" class="w-full max-h-[240px] rounded-lg bg-black outline-none border border-white/10">
-                                <source src="${videoUrl}" type="${mimeType}">
-                                <source src="${videoUrl}">
-                                Your browser does not support video playback.
-                            </video>
                         </div>`;
                     });
+                    recHtml += `</div>`;
                     recContainer.innerHTML = recHtml;
+
+                    // Dynamically resolve media duration for all cards
+                    recList.forEach((r, displayIdx) => {
+                        const origIdx = (typeof r === 'object' && r.original_index !== undefined) ? r.original_index : displayIdx;
+                        let videoUrl = typeof r === 'string' ? r : (r.stream_url || r.url || recPath);
+                        if (videoUrl && !videoUrl.startsWith('http') && !videoUrl.startsWith('/')) {
+                            videoUrl = '/' + videoUrl;
+                        }
+                        if (videoUrl && videoUrl.includes('/storage/')) {
+                            videoUrl = videoUrl.replace('/storage/', '/media-stream/');
+                        }
+                        const badgeId = `rec-duration-badge-${origIdx}-${displayIdx}`;
+                        const initialDuration = (r && r.duration && r.duration > 0) ? r.duration : 0;
+                        resolveMediaDuration(videoUrl, badgeId, initialDuration);
+                    });
                 } else {
-                    recContainer.innerHTML = '<div class="text-slate-400 text-xs text-center pt-10">No video recordings saved for this candidate yet.</div>';
+                    recContainer.innerHTML = processingBannerHtml + `
+                    <div class="flex flex-col items-center justify-center py-10 text-center">
+                        <div class="w-10 h-10 rounded-xl bg-slate-900 border border-slate-800 flex items-center justify-center text-slate-500 mb-2.5">
+                            <i class="fa-solid fa-video-slash text-sm"></i>
+                        </div>
+                        <p class="text-xs font-medium text-slate-400">No video recordings saved yet</p>
+                        <p class="text-[11px] text-slate-500 mt-0.5 max-w-[240px]">Recordings captured during the call will appear here for download.</p>
+                    </div>`;
                 }
             }
 
@@ -2095,6 +2218,10 @@ export function leaveInterviewerCall(isEndAll = false) {
 
     const recStopBtn = document.getElementById('btn-stop-recording');
     if (recStopBtn) recStopBtn.style.display = 'none';
+
+    const recUploadBtn = document.getElementById('btn-uploading-recording');
+    if (recUploadBtn) recUploadBtn.style.display = 'none';
+
     if (adminMediaRecorder && adminMediaRecorder.state !== 'inactive') {
         try { adminMediaRecorder.stop(); } catch(e) {}
     }
@@ -2140,10 +2267,199 @@ export function endCallForAll() {
     }
 }
 
-// MediaRecorder recording
+// MediaRecorder, Chunked Uploader & Recording Compositor
 let adminMediaRecorder = null;
-let adminRecordedChunks = [];
+let recordingCompositor = null;
-let recAudioContext = null;
+let recordingTimerInterval = null;
+let recordingStartTime = null;
+
+let isRecordingProcessing = false;
+let recordingProcessingSessionId = null;
+let recordingKnownCountBeforeProcessing = 0;
+let currentChunkIndex = 0;
+let chunkUploadQueue = [];
+let currentRecordingSessionId = null;
+let isStopRecordingRequested = false;
+let totalRecordedChunksCount = 0;
+let isFinalizingRecording = false;
+const MAX_CONCURRENT_UPLOADS = 2;
+let activeUploadsCount = 0;
+
+window.dismissRecordingProcessingBanner = function() {
+    isRecordingProcessing = false;
+    recordingProcessingSessionId = null;
+    const b = document.getElementById('recording-processing-banner');
+    if (b) b.remove();
+};
+
+function updateRecordingButtonProgress(isFinalStep = false) {
+    const total = Math.max(1, totalRecordedChunksCount || currentChunkIndex || 1);
+    const uploaded = chunkUploadQueue.filter(item => item.isUploaded && !item.isFinal).length;
+
+    let pct = isFinalStep ? 100 : Math.min(92, Math.max(15, Math.round((uploaded / total) * 90)));
+
+    const recStopBtn = document.getElementById('btn-stop-recording');
+    if (!recStopBtn) return;
+
+    if (isFinalStep) {
+        recStopBtn.innerHTML = '<i class="fa-solid fa-circle-check text-emerald-300 mr-1.5"></i><span class="text-emerald-200 font-bold">Saved!</span>';
+    } else {
+        recStopBtn.innerHTML = '<i class="fa-solid fa-circle-notch fa-spin text-indigo-200"></i><span>Saving <span id="rec-upload-progress-text" class="font-mono font-bold text-sky-200">' + pct + '%</span></span><span class="absolute -top-1 -right-1 flex h-2.5 w-2.5"><span class="animate-ping absolute inline-flex h-full w-full rounded-full bg-sky-400 opacity-75"></span><span class="relative inline-flex rounded-full h-2.5 w-2.5 bg-sky-500"></span></span>';
+    }
+}
+
+let currentSessionDuration = 0;
+
+function queueChunkUpload(chunkBlob, isFinal = false, duration = null) {
+    if (!currentRecordingSessionId) return;
+
+    if (chunkBlob && chunkBlob.size > 0) {
+        const index = currentChunkIndex++;
+        chunkUploadQueue.push({
+            sessionId: currentRecordingSessionId,
+            index: index,
+            blob: chunkBlob,
+            isFinal: false,
+            isUploading: false,
+            isUploaded: false,
+            retries: 0
+        });
+    }
+
+    if (isFinal) {
+        totalRecordedChunksCount = currentChunkIndex;
+        chunkUploadQueue.push({
+            sessionId: currentRecordingSessionId,
+            index: currentChunkIndex,
+            blob: null,
+            isFinal: true,
+            totalChunks: currentChunkIndex,
+            duration: duration || currentSessionDuration || 0,
+            isUploading: false,
+            isUploaded: false,
+            retries: 0
+        });
+    }
+
+    if (isStopRecordingRequested) {
+        updateRecordingButtonProgress(false);
+    }
+
+    triggerChunkQueueProcessing();
+}
+
+function triggerChunkQueueProcessing() {
+    // 1. Dispatch concurrent data uploads
+    while (activeUploadsCount < MAX_CONCURRENT_UPLOADS) {
+        const nextItem = chunkUploadQueue.find(item => !item.isUploading && !item.isUploaded && !item.isFinal);
+        if (!nextItem) break;
+        uploadSingleChunk(nextItem);
+    }
+
+    // 2. Dispatch finalization trigger once all data chunks are confirmed uploaded
+    const hasPendingDataChunks = chunkUploadQueue.some(item => !item.isUploaded && !item.isFinal);
+    const finalMarker = chunkUploadQueue.find(item => item.isFinal && !item.isUploading && !item.isUploaded);
+
+    if (!hasPendingDataChunks && finalMarker && activeUploadsCount === 0 && !isFinalizingRecording) {
+        isFinalizingRecording = true;
+        uploadSingleChunk(finalMarker);
+    }
+}
+
+async function uploadSingleChunk(item) {
+    item.isUploading = true;
+    activeUploadsCount++;
+
+    if (!currentInterviewId && typeof document !== 'undefined') {
+        currentInterviewId = document.body?.dataset?.interviewId || window.interviewId;
+    }
+    if (!currentInterviewId) {
+        console.error('[Recording Chunk] Missing currentInterviewId');
+        item.isUploading = false;
+        activeUploadsCount--;
+        return;
+    }
+
+    const csrfToken = document.querySelector('meta[name="csrf-token"]')?.content || window.csrfToken;
+    const formData = new FormData();
+    formData.append('session_id', item.sessionId);
+    formData.append('chunk_index', item.index);
+    formData.append('is_final', item.isFinal ? '1' : '0');
+    formData.append('total_chunks', item.totalChunks || currentChunkIndex);
+    if (item.duration) {
+        formData.append('duration', item.duration);
+    }
+    formData.append('_token', csrfToken);
+    if (item.blob && item.blob.size > 0) {
+        formData.append('chunk', item.blob, `part_${item.index}.webm`);
+    }
+
+    try {
+        const response = await fetch(`/candidate/upload-recording-chunk/${currentInterviewId}`, {
+            method: 'POST',
+            headers: {
+                'Accept': 'application/json',
+                'X-CSRF-TOKEN': csrfToken,
+                'X-Requested-With': 'XMLHttpRequest'
+            },
+            body: formData
+        });
+
+        if (!response.ok) {
+            const errText = await response.text();
+            throw new Error(`HTTP ${response.status}: ${errText}`);
+        }
+
+        const resJson = await response.json();
+        item.isUploading = false;
+        item.isUploaded = true;
+        activeUploadsCount--;
+
+        if (isStopRecordingRequested) {
+            updateRecordingButtonProgress(item.isFinal);
+        }
+
+        if (item.isFinal) {
+            console.log('[Recording Chunk] Final chunk processed by server:', resJson);
+            isRecordingProcessing = true;
+            recordingProcessingSessionId = item.sessionId;
+            isStopRecordingRequested = false;
+            isFinalizingRecording = false;
+            updateRecordingButtonProgress(true);
+            pollReviewData();
+
+            setTimeout(() => {
+                const stopBtn = document.getElementById('btn-stop-recording');
+                const startBtn = document.getElementById('btn-start-recording');
+                if (stopBtn) {
+                    stopBtn.style.display = 'none';
+                    stopBtn.disabled = false;
+                    stopBtn.className = 'hidden inline-flex items-center gap-1.5 px-3 py-1.5 rounded-lg text-xs font-semibold bg-rose-600 hover:bg-rose-700 text-white shadow-sm animate-pulse transition-all cursor-pointer';
+                    stopBtn.innerHTML = '<i class="fa-solid fa-square text-xs mr-1.5"></i> <span>Recording <span id="rec-live-timer" class="font-mono text-xs font-bold">(00:00)</span> - Stop</span>';
+                }
+                if (startBtn) startBtn.style.display = 'inline-flex';
+            }, 1200);
+        }
+
+        triggerChunkQueueProcessing();
+    } catch(err) {
+        console.warn(`[Recording Chunk] Upload failed for chunk ${item.index} (attempt ${item.retries + 1}):`, err);
+        item.isUploading = false;
+        activeUploadsCount--;
+        item.retries++;
+
+        if (item.retries < 5) {
+            setTimeout(() => {
+                triggerChunkQueueProcessing();
+            }, item.retries * 800);
+        } else {
+            console.error(`[Recording Chunk] Critical upload failure for chunk ${item.index}. Retrying after delay...`);
+            setTimeout(() => {
+                triggerChunkQueueProcessing();
+            }, 2500);
+        }
+    }
+}
 
 export function startCallRecording() {
     if (!currentInterviewId) {
@@ -2156,75 +2472,88 @@ export function startCallRecording() {
     }
 
     const candVid = document.getElementById('interviewer-cand-video');
-    const candidateStream = (candVid && candVid.srcObject) ? candVid.srcObject : null;
+    const candNameEl = document.getElementById('modal-cand-name');
-    const streamToRecord = new MediaStream();
+    const candidateName = candNameEl ? candNameEl.innerText.trim() : 'Candidate';
 
-    if (candidateStream) {
+    // 1. Initialize RecordingCompositor (1280x720 @ 24fps for ultra-fast, smooth streaming)
-        candidateStream.getVideoTracks().forEach(track => {
+    recordingCompositor = new RecordingCompositor({
-            if (track.readyState === 'live') {
+        width: 1280,
-                try { streamToRecord.addTrack(track); } catch(e) {}
+        height: 720,
-            }
+        fps: 24,
-        });
+        getParticipantsData: () => {
-    }
+            const candStream = (candVid && candVid.srcObject) ? candVid.srcObject : null;
+            const candCamIcon = document.getElementById('cand-cam-status');
+            const candMicIcon = document.getElementById('cand-mic-status');
+            const isCandCamOn = candCamIcon ? candCamIcon.classList.contains('fa-video') : true;
+            const isCandMicOn = candMicIcon ? candMicIcon.classList.contains('fa-microphone') : true;
 
-    if (streamToRecord.getVideoTracks().length === 0 && interviewerLocalStream) {
+            const panelistsList = [];
-        interviewerLocalStream.getVideoTracks().forEach(track => {
+            const panelistStreamsList = [];
-            if (track.readyState === 'live') {
-                try { streamToRecord.addTrack(track); } catch(e) {}
-            }
-        });
-    }
 
-    const candAudioTracks = candidateStream ? candidateStream.getAudioTracks().filter(t => t.readyState === 'live') : [];
+            panelistMeshTiles.forEach((stream, pid) => {
-    const adminAudioTracks = interviewerLocalStream ? interviewerLocalStream.getAudioTracks().filter(t => t.readyState === 'live') : [];
+                const peerInfo = latestActivePeers.find(p => p.peer_id === pid);
+                const pMicEl = document.getElementById('mesh-mic-' + pid);
+                const pCamEl = document.getElementById('mesh-cam-' + pid);
+                const isMicOn = pMicEl ? pMicEl.classList.contains('fa-microphone') : (peerInfo ? isTrueVal(peerInfo.mic_on) : true);
+                const isCamOn = pCamEl ? pCamEl.classList.contains('fa-video') : (peerInfo ? isTrueVal(peerInfo.cam_on) : true);
+                const pName = peerInfo ? (peerInfo.name || 'Panelist') : 'Panelist';
+                const pRole = peerInfo ? (peerInfo.role === 'admin' ? 'Admin' : 'Panelist') : 'Panelist';
 
-    if (candAudioTracks.length > 0 || adminAudioTracks.length > 0) {
+                panelistsList.push({
-        try {
+                    peerId: pid,
-            const AudioContextClass = window.AudioContext || window.webkitAudioContext;
+                    name: pName,
-            if (recAudioContext) {
+                    role: pRole,
-                try { recAudioContext.close(); } catch(e) {}
+                    micOn: isMicOn,
-            }
+                    camOn: isCamOn
-            recAudioContext = new AudioContextClass();
+                });
-            const audioDestination = recAudioContext.createMediaStreamDestination();
 
-            if (candAudioTracks.length > 0) {
+                if (stream) {
-                const candAudioStream = new MediaStream(candAudioTracks);
+                    panelistStreamsList.push({ peerId: pid, stream: stream });
-                const candSource = recAudioContext.createMediaStreamSource(candAudioStream);
+                }
-                candSource.connect(audioDestination);
+            });
-            }
 
-            if (adminAudioTracks.length > 0) {
+            return {
-                const adminAudioStream = new MediaStream(adminAudioTracks);
+                candidateStream: candStream,
-                const adminSource = recAudioContext.createMediaStreamSource(adminAudioStream);
+                candidateName: candidateName,
-                adminSource.connect(audioDestination);
+                candidateCamOn: isCandCamOn,
-            }
+                candidateMicOn: isCandMicOn,
-
+                selfStream: interviewerLocalStream,
-            const mixedAudioTrack = audioDestination.stream.getAudioTracks()[0];
+                selfName: window.currentUserName || 'Interviewer',
-            if (mixedAudioTrack) {
+                selfCamOn: isInterviewerCamOn,
-                streamToRecord.addTrack(mixedAudioTrack);
+                selfMicOn: isInterviewerMicOn,
-            }
+                panelists: panelistsList,
-        } catch(e) {
+                panelistStreams: panelistStreamsList
-            const fallbackAudio = candAudioTracks[0] || adminAudioTracks[0];
+            };
-            if (fallbackAudio) {
-                try { streamToRecord.addTrack(fallbackAudio); } catch(err) {}
-            }
         }
-    }
+    });
 
-    const activeTracks = streamToRecord.getTracks().filter(t => t.readyState === 'live');
-    if (activeTracks.length === 0) {
-        alert('No active video/audio stream available to record. Please start or join the call first.');
-        return;
-    }
-
-    adminRecordedChunks = [];
     try {
-        let options = {};
+        recordingCompositor.start();
+        const streamToRecord = recordingCompositor.getStream();
+
+        currentRecordingSessionId = 'rec_' + currentInterviewId + '_' + Date.now() + '_' + Math.random().toString(36).substring(2, 7);
+        currentChunkIndex = 0;
+        chunkUploadQueue = [];
+        isStopRecordingRequested = false;
+        totalRecordedChunksCount = 0;
+        isFinalizingRecording = false;
+        activeUploadsCount = 0;
+        currentSessionDuration = 0;
+
+        const existingCards = document.querySelectorAll('#modal-recordings-container .recording-card, #modal-recordings-container video');
+        recordingKnownCountBeforeProcessing = existingCards ? existingCards.length : 0;
+
+        // Controlled bitrate configuration (1.2 Mbps video, 64 kbps audio)
+        let options = {
+            videoBitsPerSecond: 1200000,
+            audioBitsPerSecond: 64000
+        };
+
         if (typeof MediaRecorder.isTypeSupported === 'function') {
             if (MediaRecorder.isTypeSupported('video/webm;codecs=vp8,opus')) {
-                options = { mimeType: 'video/webm;codecs=vp8,opus' };
+                options.mimeType = 'video/webm;codecs=vp8,opus';
             } else if (MediaRecorder.isTypeSupported('video/webm')) {
-                options = { mimeType: 'video/webm' };
+                options.mimeType = 'video/webm';
             }
         }
 
@@ -2234,62 +2563,93 @@ export function startCallRecording() {
             adminMediaRecorder = new MediaRecorder(streamToRecord);
         }
 
+        // Real-time chunk slice handler
         adminMediaRecorder.ondataavailable = function(e) {
             if (e.data && e.data.size > 0) {
-                adminRecordedChunks.push(e.data);
+                queueChunkUpload(e.data, false);
             }
         };
 
         adminMediaRecorder.onstop = function() {
-            if (recAudioContext) {
+            if (recordingCompositor) {
-                try { recAudioContext.close(); } catch(e) {}
+                recordingCompositor.stop();
-                recAudioContext = null;
+                recordingCompositor = null;
             }
-            if (adminRecordedChunks.length === 0) return;
+            // Signal finalization after the final slice is recorded
-            const recMime = adminMediaRecorder.mimeType || 'video/webm';
+            queueChunkUpload(null, true, currentSessionDuration);
-            const isMp4 = recMime.includes('mp4');
-            const ext = isMp4 ? 'mp4' : 'webm';
-            const blobType = isMp4 ? 'video/mp4' : 'video/webm';
-
-            const blob = new Blob(adminRecordedChunks, { type: blobType });
-            uploadRecordedBlob(blob, ext);
         };
 
-        adminMediaRecorder.start(1000);
+        // Start timeslice recording (6,000ms = 6s chunks ~800KB each for near-instant concurrent background uploads)
+        adminMediaRecorder.start(6000);
+        recordingStartTime = Date.now();
 
+        // Update UI buttons & Live Timer
         const recStartBtn = document.getElementById('btn-start-recording');
         const recStopBtn = document.getElementById('btn-stop-recording');
         if (recStartBtn) recStartBtn.style.display = 'none';
-        if (recStopBtn) recStopBtn.style.display = 'inline-flex';
+        if (recStopBtn) {
-
+            recStopBtn.style.display = 'inline-flex';
-        if (typeof window.Swal !== 'undefined') {
+            recStopBtn.disabled = false;
-            window.Swal.fire({
+            recStopBtn.className = 'inline-flex items-center gap-1.5 px-3 py-1.5 rounded-lg text-xs font-semibold bg-rose-600 hover:bg-rose-700 text-white shadow-sm animate-pulse transition-all';
-                icon: 'info',
+            recStopBtn.innerHTML = '<i class="fa-solid fa-square text-xs mr-1.5"></i> <span>Recording <span id="rec-live-timer" class="font-mono text-xs font-bold">(00:00)</span> - Stop</span>';
-                title: 'Recording Started',
-                text: 'Interview call recording is active (silent mode - candidate is not notified).',
-                toast: true,
-                position: 'top-end',
-                timer: 3000,
-                showConfirmButton: false
-            });
         }
+
+        if (recordingTimerInterval) clearInterval(recordingTimerInterval);
+        recordingTimerInterval = setInterval(() => {
+            const timerEl = document.getElementById('rec-live-timer');
+            if (timerEl && recordingStartTime) {
+                const totalSec = Math.floor((Date.now() - recordingStartTime) / 1000);
+                const mins = String(Math.floor(totalSec / 60)).padStart(2, '0');
+                const secs = String(totalSec % 60).padStart(2, '0');
+                timerEl.innerText = `(${mins}:${secs})`;
+            }
+        }, 1000);
     } catch(e) {
+        if (recordingCompositor) {
+            recordingCompositor.stop();
+            recordingCompositor = null;
+        }
         alert('Recording failed to initialize: ' + e.message);
     }
 }
 
 export function stopCallRecording() {
+    if (recordingTimerInterval) {
+        clearInterval(recordingTimerInterval);
+        recordingTimerInterval = null;
+    }
+    isStopRecordingRequested = true;
+
+    currentSessionDuration = recordingStartTime ? Math.max(1, Math.round((Date.now() - recordingStartTime) / 1000)) : 0;
+
+    const recStartBtn = document.getElementById('btn-start-recording');
+    const recStopBtn = document.getElementById('btn-stop-recording');
+
+    if (recStartBtn) recStartBtn.style.display = 'none';
+    if (recStopBtn) {
+        recStopBtn.style.display = 'inline-flex';
+        recStopBtn.disabled = true;
+        recStopBtn.className = 'relative inline-flex items-center gap-2 px-3.5 py-1.5 text-xs font-semibold text-white bg-indigo-600 rounded-lg shadow-lg shadow-indigo-500/50 ring-2 ring-indigo-400 ring-offset-2 ring-offset-slate-900 animate-pulse transition-all';
+        recStopBtn.innerHTML = '<i class="fa-solid fa-circle-notch fa-spin text-indigo-200"></i><span>Saving <span id="rec-upload-progress-text" class="font-mono font-bold text-sky-200">15%</span></span><span class="absolute -top-1 -right-1 flex h-2.5 w-2.5"><span class="animate-ping absolute inline-flex h-full w-full rounded-full bg-sky-400 opacity-75"></span><span class="relative inline-flex rounded-full h-2.5 w-2.5 bg-sky-500"></span></span>';
+    }
+
     if (adminMediaRecorder && adminMediaRecorder.state !== 'inactive') {
         adminMediaRecorder.stop();
     }
-    const recStartBtn = document.getElementById('btn-start-recording');
+    if (recordingCompositor) {
-    const recStopBtn = document.getElementById('btn-stop-recording');
+        recordingCompositor.stop();
-    if (recStartBtn) recStartBtn.style.display = 'inline-flex';
+        recordingCompositor = null;
-    if (recStopBtn) recStopBtn.style.display = 'none';
+    }
 }
 
 export function uploadRecordedBlob(blob, ext = 'webm') {
-    if (!currentInterviewId) return;
+    if (!currentInterviewId && typeof document !== 'undefined') {
+        currentInterviewId = document.body?.dataset?.interviewId || window.interviewId;
+    }
+    if (!currentInterviewId) {
+        console.error('Cannot upload recording: missing interview ID');
+        return;
+    }
     const csrfToken = document.querySelector('meta[name="csrf-token"]')?.content || window.csrfToken;
 
     const formData = new FormData();
@@ -2298,16 +2658,44 @@ export function uploadRecordedBlob(blob, ext = 'webm') {
 
     fetch(`/candidate/upload-recording/${currentInterviewId}`, {
         method: 'POST',
+        headers: {
+            'Accept': 'application/json',
+            'X-CSRF-TOKEN': csrfToken,
+            'X-Requested-With': 'XMLHttpRequest'
+        },
         body: formData
     })
-    .then(r => r.json())
+    .then(async r => {
+        const contentType = r.headers.get('content-type') || '';
+        const isJson = contentType.includes('application/json');
+        if (!r.ok) {
+            const errText = await r.text();
+            let errMsg = `Upload failed (HTTP ${r.status})`;
+            if (isJson) {
+                try {
+                    const errJson = JSON.parse(errText);
+                    if (errJson && errJson.message) errMsg = errJson.message;
+                } catch(e) {}
+            }
+            throw new Error(errMsg);
+        }
+        if (isJson) {
+            return r.json();
+        }
+        const text = await r.text();
+        try {
+            return JSON.parse(text);
+        } catch(e) {
+            return { success: true };
+        }
+    })
     .then(res => {
-        if (res.success) {
+        if (res && res.success) {
             if (typeof window.Swal !== 'undefined') {
                 window.Swal.fire({
                     icon: 'success',
                     title: 'Recording Saved!',
-                    text: 'Call recording saved successfully under Candidate Profile and Report.',
+                    text: 'Call recording saved successfully to server and candidate report.',
                     toast: true,
                     position: 'top-end',
                     timer: 3500,
@@ -2315,9 +2703,34 @@ export function uploadRecordedBlob(blob, ext = 'webm') {
                 });
             }
             pollReviewData();
+        } else if (res && res.message) {
+            if (typeof window.Swal !== 'undefined') {
+                window.Swal.fire({
+                    icon: 'warning',
+                    title: 'Recording Notice',
+                    text: res.message,
+                    toast: true,
+                    position: 'top-end',
+                    timer: 4000,
+                    showConfirmButton: false
+                });
+            }
         }
     })
-    .catch(err => console.log('Recording upload error:', err));
+    .catch(err => {
+        console.error('Recording upload error:', err);
+        if (typeof window.Swal !== 'undefined') {
+            window.Swal.fire({
+                icon: 'error',
+                title: 'Recording Upload Failed',
+                text: err.message || 'Failed to save recording to server.',
+                toast: true,
+                position: 'top-end',
+                timer: 4500,
+                showConfirmButton: false
+            });
+        }
+    });
 }
 
 export function toggleInterviewerMic() {

resources/js/recording-compositor.js

@@ -0,0 +1,685 @@
+/**
+ * Recording Compositor & Multi-Track Audio Mixer Engine
+ *
+ * Creates a unified 1920x1080 composite video stream from multiple WebRTC video sources
+ * (Candidate Webcam, Screen Share, Self Interviewer, Remote Mesh Panelists)
+ * matching the interviewer layout:
+ * - Large Main Area: Candidate Webcam (or Screen Share when active)
+ * - Right Sidebar: Stacked Peers (and Candidate Webcam at top when screen share is active)
+ * - Camera-off Avatar Placeholders with initials and badges
+ * - Bottom Overflow Row: Placed horizontally below main area if peers > 3
+ * - AudioContext multi-track audio mixing
+ */
+
+export class RecordingCompositor {
+    /**
+     * @param {{width:number, height:number, fps: number, getParticipantsData: () => {}}} options
+     */
+    constructor(options = {}) {
+        this.width = options.width || 1920;
+        this.height = options.height || 1080;
+        this.fps = options.fps || 30;
+
+        this.canvas = document.createElement("canvas");
+        this.canvas.width = this.width;
+        this.canvas.height = this.height;
+        this.ctx = this.canvas.getContext("2d", { alpha: false });
+
+        this.audioCtx = null;
+        this.audioDestination = null;
+        this.audioSourceNodes = [];
+        this.mixedAudioTrack = null;
+
+        this.animationFrameId = null;
+        this.isRunning = false;
+        this.startTime = null;
+        this.speakingStates = new Map();
+
+        // Metadata provider function
+        this.getParticipantsData = options.getParticipantsData || (() => ({}));
+    }
+
+    start() {
+        if (this.isRunning) return;
+        this.isRunning = true;
+        this.startTime = Date.now();
+
+        this.initAudioMixer();
+        this.renderLoop();
+    }
+
+    stop() {
+        this.isRunning = false;
+        if (this.animationFrameId) {
+            cancelAnimationFrame(this.animationFrameId);
+            this.animationFrameId = null;
+        }
+
+        if (this.audioSourceNodes.length > 0) {
+            this.audioSourceNodes.forEach((node) => {
+                try {
+                    node.disconnect();
+                } catch (e) {}
+            });
+            this.audioSourceNodes = [];
+        }
+
+        if (this.audioCtx) {
+            try {
+                this.audioCtx.close();
+            } catch (e) {}
+            this.audioCtx = null;
+        }
+        this.audioDestination = null;
+        this.mixedAudioTrack = null;
+    }
+
+    getStream() {
+        const videoTrack = this.canvas
+            .captureStream(this.fps)
+            .getVideoTracks()[0];
+        const tracks = [];
+        if (videoTrack) tracks.push(videoTrack);
+        if (this.mixedAudioTrack) tracks.push(this.mixedAudioTrack);
+        return new MediaStream(tracks);
+    }
+
+    setSpeakingState(key, isSpeaking) {
+        this.speakingStates.set(key, Boolean(isSpeaking));
+    }
+
+    initAudioMixer() {
+        try {
+            const AudioCtxClass =
+                window.AudioContext || window.webkitAudioContext;
+            if (!AudioCtxClass) return;
+
+            this.audioCtx = new AudioCtxClass();
+            this.audioDestination =
+                this.audioCtx.createMediaStreamDestination();
+
+            const data = this.getParticipantsData();
+            const audioStreams = [];
+
+            // 1. Candidate Audio
+            if (
+                data.candidateStream &&
+                data.candidateStream.getAudioTracks().length > 0
+            ) {
+                audioStreams.push(data.candidateStream);
+            }
+            // 2. Interviewer Self Audio
+            if (
+                data.selfStream &&
+                data.selfStream.getAudioTracks().length > 0
+            ) {
+                audioStreams.push(data.selfStream);
+            }
+            // 3. Panelist Mesh Audios
+            if (data.panelistStreams && Array.isArray(data.panelistStreams)) {
+                data.panelistStreams.forEach((ps) => {
+                    if (
+                        ps &&
+                        ps.stream &&
+                        ps.stream.getAudioTracks().length > 0
+                    ) {
+                        audioStreams.push(ps.stream);
+                    }
+                });
+            }
+
+            audioStreams.forEach((stream) => {
+                try {
+                    const source =
+                        this.audioCtx.createMediaStreamSource(stream);
+                    source.connect(this.audioDestination);
+                    this.audioSourceNodes.push(source);
+                } catch (e) {}
+            });
+
+            this.mixedAudioTrack =
+                this.audioDestination.stream.getAudioTracks()[0] || null;
+        } catch (e) {
+            console.warn("[RecordingCompositor] Audio mixing error:", e);
+        }
+    }
+
+    renderLoop() {
+        if (!this.isRunning) return;
+        this.renderFrame();
+        this.animationFrameId = requestAnimationFrame(() => this.renderLoop());
+    }
+
+    renderFrame() {
+        const ctx = this.ctx;
+        const W = this.width;
+        const H = this.height;
+
+        // Dark background
+        ctx.fillStyle = "#090d16";
+        ctx.fillRect(0, 0, W, H);
+
+        const data = this.getParticipantsData();
+
+        // 1. Candidate Feed
+        const candVideo = document.getElementById("interviewer-cand-video");
+        const isCandCamOn = data.candidateCamOn !== false;
+        const isCandMicOn = data.candidateMicOn !== false;
+        const candidateFeed = {
+            id: "candidate",
+            type: "candidate",
+            name: data.candidateName || "Candidate",
+            initials: this.extractInitials(data.candidateName || "Candidate"),
+            video: candVideo,
+            hasVideo: isCandCamOn && this.isVideoPlaying(candVideo),
+            isCamOn: isCandCamOn,
+            isMicOn: isCandMicOn,
+            isSpeaking:
+                this.speakingStates.get("interviewer-cand-video") || false,
+            badge: "Candidate",
+        };
+
+        // 2. Screen Share Feed
+        const screenVideo = document.getElementById("interviewer-screen-video");
+        const isScreenSharing = this.isScreenShareActive(screenVideo);
+        const screenFeed = {
+            id: "screen",
+            type: "screen",
+            name: "Candidate Live Screen",
+            initials: "SCR",
+            video: screenVideo,
+            hasVideo: isScreenSharing,
+            isCamOn: true,
+            isMicOn: false,
+            isSpeaking: false,
+            badge: "Shared Screen",
+        };
+
+        // 3. Self Interviewer Feed
+        const selfVideo = document.getElementById("interviewer-self-video");
+        const isSelfCamOn = data.selfCamOn !== false;
+        const isSelfMicOn = data.selfMicOn !== false;
+        const selfFeed = {
+            id: "self",
+            type: "interviewer",
+            name: data.selfName
+                ? `${data.selfName} (You)`
+                : "Interviewer (You)",
+            initials: this.extractInitials(data.selfName || "IV"),
+            video: selfVideo,
+            hasVideo: isSelfCamOn && this.isVideoPlaying(selfVideo),
+            isCamOn: isSelfCamOn,
+            isMicOn: isSelfMicOn,
+            isSpeaking: false,
+            badge: "Interviewer",
+        };
+
+        // 4. Panelist Feeds
+        const panelistFeeds = [];
+        if (data.panelists && Array.isArray(data.panelists)) {
+            data.panelists.forEach((p) => {
+                const pVid = document.getElementById(
+                    "panelist-video-" + p.peerId,
+                );
+                const isCamOn = p.camOn !== false;
+                const isMicOn = p.micOn !== false;
+                panelistFeeds.push({
+                    id: p.peerId,
+                    type: "panelist",
+                    name: p.name || "Panelist",
+                    initials: this.extractInitials(p.name || "Panelist"),
+                    video: pVid,
+                    hasVideo: isCamOn && this.isVideoPlaying(pVid),
+                    isCamOn: isCamOn,
+                    isMicOn: isMicOn,
+                    isSpeaking: false,
+                    badge: p.role || "Panelist",
+                });
+            });
+        }
+
+        // Layout determination
+        let mainFeed;
+        let secondaryFeeds = [];
+
+        if (isScreenSharing) {
+            // When screen share is active:
+            // Main = Screen Share
+            // Right Sidebar Top = Candidate Webcam
+            // Followed by Self and Panelists
+            mainFeed = screenFeed;
+            secondaryFeeds = [candidateFeed, selfFeed, ...panelistFeeds];
+        } else {
+            // Normal Call:
+            // Main = Candidate Webcam
+            // Right Sidebar = Self and Panelists
+            mainFeed = candidateFeed;
+            secondaryFeeds = [selfFeed, ...panelistFeeds];
+        }
+
+        // Compute geometry with strict 16:9 aspect ratio preservation for every tile
+        const gap = 16;
+        const padX = 24;
+        const totalSecondary = secondaryFeeds.length;
+
+        if (totalSecondary === 0) {
+            // Case 0: Only Main Feed (Full Canvas 16:9)
+            const mainH = 1032;
+            const mainW = Math.round(mainH * (16 / 9)); // 1835px
+            const mainX = Math.round((W - mainW) / 2);
+            const mainY = Math.round((H - mainH) / 2);
+            this.renderTile(
+                ctx,
+                mainFeed,
+                { x: mainX, y: mainY, w: mainW, h: mainH },
+                true,
+            );
+        } else if (totalSecondary === 1) {
+            // Case 1: Main + 1 Sidebar Tile (Both 16:9)
+            const sideW = 480;
+            const sideH = Math.round(sideW * (9 / 16)); // 270px
+            const mainW = 1376;
+            const mainH = Math.round(mainW * (9 / 16)); // 774px
+
+            const mainX = padX;
+            const mainY = Math.round((H - mainH) / 2);
+            const sideX = padX + mainW + gap;
+            const sideY = Math.round((H - sideH) / 2);
+
+            this.renderTile(
+                ctx,
+                mainFeed,
+                { x: mainX, y: mainY, w: mainW, h: mainH },
+                true,
+            );
+            this.renderTile(
+                ctx,
+                secondaryFeeds[0],
+                { x: sideX, y: sideY, w: sideW, h: sideH },
+                false,
+            );
+        } else if (totalSecondary === 2) {
+            // Case 2: Main + 2 Sidebar Tiles (All 16:9)
+            const sideW = 480;
+            const sideH = Math.round(sideW * (9 / 16)); // 270px
+            const mainW = 1376;
+            const mainH = Math.round(mainW * (9 / 16)); // 774px
+
+            const mainX = padX;
+            const mainY = Math.round((H - mainH) / 2);
+            const sideX = padX + mainW + gap;
+
+            const totalSideH = 2 * sideH + gap; // 556px
+            const sideYStart = Math.round((H - totalSideH) / 2);
+
+            this.renderTile(
+                ctx,
+                mainFeed,
+                { x: mainX, y: mainY, w: mainW, h: mainH },
+                true,
+            );
+            this.renderTile(
+                ctx,
+                secondaryFeeds[0],
+                { x: sideX, y: sideYStart, w: sideW, h: sideH },
+                false,
+            );
+            this.renderTile(
+                ctx,
+                secondaryFeeds[1],
+                { x: sideX, y: sideYStart + sideH + gap, w: sideW, h: sideH },
+                false,
+            );
+        } else if (totalSecondary === 3) {
+            // Case 3: Main + 3 Sidebar Tiles (All 16:9)
+            const sideH = 330;
+            const sideW = Math.round(sideH * (16 / 9)); // 587px
+            const totalSideH = 3 * sideH + 2 * gap; // 1022px
+            const topY = Math.round((H - totalSideH) / 2); // 29px
+
+            const sideX = W - padX - sideW;
+            const mainW = sideX - gap - padX; // 1270px
+            const mainH = Math.round(mainW * (9 / 16)); // 714px
+
+            const mainX = padX;
+            const mainY = topY;
+
+            this.renderTile(
+                ctx,
+                mainFeed,
+                { x: mainX, y: mainY, w: mainW, h: mainH },
+                true,
+            );
+
+            for (let i = 0; i < 3; i++) {
+                const feed = secondaryFeeds[i];
+                const tileY = topY + i * (sideH + gap);
+                this.renderTile(
+                    ctx,
+                    feed,
+                    { x: sideX, y: tileY, w: sideW, h: sideH },
+                    false,
+                );
+            }
+        } else {
+            // Case 4: Main + 3 Sidebar Tiles + Bottom Overflow Row (All 16:9)
+            const sideH = 330;
+            const sideW = Math.round(sideH * (16 / 9)); // 587px
+            const totalSideH = 3 * sideH + 2 * gap; // 1022px
+            const topY = Math.round((H - totalSideH) / 2); // 29px
+
+            const sideX = W - padX - sideW;
+            const mainW = sideX - gap - padX; // 1270px
+            const mainH = Math.round(mainW * (9 / 16)); // 714px
+
+            const mainX = padX;
+            const mainY = topY;
+
+            // 1. Render Main
+            this.renderTile(
+                ctx,
+                mainFeed,
+                { x: mainX, y: mainY, w: mainW, h: mainH },
+                true,
+            );
+
+            // 2. Render 3 Sidebar Tiles
+            for (let i = 0; i < 3; i++) {
+                const feed = secondaryFeeds[i];
+                const tileY = topY + i * (sideH + gap);
+                this.renderTile(
+                    ctx,
+                    feed,
+                    { x: sideX, y: tileY, w: sideW, h: sideH },
+                    false,
+                );
+            }
+
+            // 3. Render Bottom Overflow Tiles (each 16:9)
+            const overflowFeeds = secondaryFeeds.slice(3);
+            const numOverflow = overflowFeeds.length;
+            const botMaxH = totalSideH - mainH - gap; // 292px
+            const botYBase = topY + mainH + gap; // 759px
+
+            // Calculate width per tile to fit in mainW
+            const candBotW = Math.floor(
+                (mainW - (numOverflow - 1) * gap) / numOverflow,
+            );
+            const candBotH = Math.round(candBotW * (9 / 16));
+
+            let botW, botH;
+            if (candBotH > botMaxH) {
+                botH = botMaxH;
+                botW = Math.round(botH * (16 / 9));
+            } else {
+                botW = candBotW;
+                botH = candBotH;
+            }
+
+            const totalBotW = numOverflow * botW + (numOverflow - 1) * gap;
+            const botXStart = mainX + Math.round((mainW - totalBotW) / 2);
+            const botY = botYBase + Math.round((botMaxH - botH) / 2);
+
+            overflowFeeds.forEach((feed, j) => {
+                const tileX = botXStart + j * (botW + gap);
+                this.renderTile(
+                    ctx,
+                    feed,
+                    { x: tileX, y: botY, w: botW, h: botH },
+                    false,
+                );
+            });
+        }
+    }
+
+    renderTile(ctx, feed, rect, isMain = false) {
+        const { x, y, w, h } = rect;
+        const radius = 12;
+
+        ctx.save();
+        this.drawRoundedClip(ctx, x, y, w, h, radius);
+
+        // Base tile background
+        ctx.fillStyle = "#0d1220";
+        ctx.fillRect(x, y, w, h);
+
+        if (feed.hasVideo && feed.video) {
+            // Draw video frame
+            if (feed.type === "screen") {
+                this.drawVideoContain(ctx, feed.video, x, y, w, h);
+            } else {
+                this.drawVideoCover(ctx, feed.video, x, y, w, h);
+            }
+        } else {
+            // Draw avatar placeholder
+            this.drawPlaceholder(ctx, feed, x, y, w, h, isMain);
+        }
+
+        ctx.restore();
+
+        // Sleek subtle border
+        ctx.save();
+        ctx.lineWidth = 1;
+        ctx.strokeStyle = "rgba(255, 255, 255, 0.08)";
+        this.drawRoundedStroke(ctx, x, y, w, h, radius);
+        ctx.restore();
+
+        // Overlay Pill Tag (Bottom-Left)
+        this.drawPillTag(ctx, feed, x + 10, y + h - 12);
+    }
+
+    drawVideoCover(ctx, video, x, y, w, h) {
+        try {
+            const vw = video.videoWidth || 640;
+            const vh = video.videoHeight || 480;
+
+            const targetRatio = w / h;
+            const videoRatio = vw / vh;
+
+            let sx = 0,
+                sy = 0,
+                sw = vw,
+                sh = vh;
+
+            if (videoRatio > targetRatio) {
+                // Video is wider than 16:9 target: crop horizontally
+                sw = Math.round(vh * targetRatio);
+                sx = Math.round((vw - sw) / 2);
+            } else {
+                // Video is taller than 16:9 target: crop vertically
+                sh = Math.round(vw / targetRatio);
+                sy = Math.round((vh - sh) / 2);
+            }
+
+            ctx.drawImage(video, sx, sy, sw, sh, x, y, w, h);
+        } catch (e) {}
+    }
+
+    drawVideoContain(ctx, video, x, y, w, h) {
+        try {
+            const vw = video.videoWidth || 1920;
+            const vh = video.videoHeight || 1080;
+
+            const targetRatio = w / h;
+            const videoRatio = vw / vh;
+
+            let dw = w;
+            let dh = h;
+            let dx = x;
+            let dy = y;
+
+            if (videoRatio > targetRatio) {
+                // Video is wider than tile
+                dh = Math.round(w / videoRatio);
+                dy = Math.round(y + (h - dh) / 2);
+            } else {
+                // Video is taller than tile
+                dw = Math.round(h * videoRatio);
+                dx = Math.round(x + (w - dw) / 2);
+            }
+
+            ctx.drawImage(video, 0, 0, vw, vh, dx, dy, dw, dh);
+        } catch (e) {}
+    }
+
+    drawPlaceholder(ctx, feed, x, y, w, h, isMain = false) {
+        const cx = x + w / 2;
+        const cy = y + h / 2 - (isMain ? 15 : 8);
+        const circleRadius = isMain
+            ? Math.min(54, h * 0.18)
+            : Math.min(32, h * 0.22);
+
+        // Circular gradient avatar
+        const gradient = ctx.createLinearGradient(
+            cx - circleRadius,
+            cy - circleRadius,
+            cx + circleRadius,
+            cy + circleRadius,
+        );
+        if (feed.type === "candidate") {
+            gradient.addColorStop(0, "#10b981");
+            gradient.addColorStop(1, "#059669");
+        } else {
+            gradient.addColorStop(0, "#5b8bff");
+            gradient.addColorStop(1, "#3b63e0");
+        }
+
+        ctx.fillStyle = gradient;
+        ctx.beginPath();
+        ctx.arc(cx, cy, circleRadius, 0, Math.PI * 2);
+        ctx.fill();
+
+        // Avatar Initials Text
+        ctx.fillStyle = "#ffffff";
+        ctx.font = `bold ${Math.round(circleRadius * 0.85)}px sans-serif`;
+        ctx.textAlign = "center";
+        ctx.textBaseline = "middle";
+        ctx.fillText(feed.initials || "IV", cx, cy);
+
+        // Participant Name
+        ctx.fillStyle = "#ffffff";
+        ctx.font = `600 ${isMain ? 18 : 13}px sans-serif`;
+        ctx.textBaseline = "top";
+        ctx.fillText(feed.name, cx, cy + circleRadius + (isMain ? 14 : 8));
+
+        // Subtitle status
+        ctx.fillStyle = "#94a3b8";
+        ctx.font = `400 ${isMain ? 13 : 10.5}px sans-serif`;
+        ctx.fillText(
+            feed.isCamOn ? "Connecting video..." : "Camera turned off",
+            cx,
+            cy + circleRadius + (isMain ? 36 : 24),
+        );
+    }
+
+    drawPillTag(ctx, feed, x, y) {
+        const text = feed.name;
+        const fontSize = 11;
+        ctx.font = `600 ${fontSize}px sans-serif`;
+
+        const textMetrics = ctx.measureText(text);
+        const tagPaddingX = 8;
+        const tagW = textMetrics.width + tagPaddingX * 2;
+        const tagH = 20;
+
+        const tagX = x;
+        const tagY = y - tagH;
+
+        ctx.save();
+        // Background
+        ctx.fillStyle = "rgba(9, 13, 22, 0.8)";
+        this.drawRoundedFill(ctx, tagX, tagY, tagW, tagH, 5);
+
+        // Border
+        ctx.strokeStyle = "rgba(255, 255, 255, 0.12)";
+        ctx.lineWidth = 1;
+        this.drawRoundedStroke(ctx, tagX, tagY, tagW, tagH, 5);
+
+        // Name text
+        ctx.fillStyle = "#e2e8f0";
+        ctx.textBaseline = "middle";
+        ctx.textAlign = "left";
+        ctx.fillText(text, tagX + tagPaddingX, tagY + tagH / 2);
+
+        ctx.restore();
+    }
+
+    isScreenShareActive(video) {
+        if (!video) return false;
+        const stream = video.srcObject;
+        if (!stream || !stream.active) return false;
+        const tracks = stream.getVideoTracks ? stream.getVideoTracks() : [];
+        if (tracks.length === 0) return false;
+        const hasLiveTrack = tracks.some(
+            (t) => t.readyState === "live" && t.enabled,
+        );
+        if (!hasLiveTrack) return false;
+
+        if (video.paused && typeof video.play === "function") {
+            video.play().catch(() => {});
+        }
+        return true;
+    }
+
+    isVideoPlaying(video) {
+        if (!video) return false;
+        const stream = video.srcObject;
+        if (!stream || !stream.active) return false;
+        const tracks = stream.getVideoTracks ? stream.getVideoTracks() : [];
+        if (tracks.length === 0) return false;
+        const hasLiveTrack = tracks.some(
+            (t) => t.readyState === "live" && t.enabled,
+        );
+        if (!hasLiveTrack) return false;
+
+        if (video.paused && typeof video.play === "function") {
+            video.play().catch(() => {});
+        }
+        return Boolean(
+            video.videoWidth > 0 || video.readyState >= 1 || hasLiveTrack,
+        );
+    }
+
+    extractInitials(name) {
+        if (!name) return "CD";
+        const parts = name.trim().split(/\s+/);
+        if (parts.length >= 2) {
+            return (parts[0][0] + parts[parts.length - 1][0]).toUpperCase();
+        }
+        return name.slice(0, 2).toUpperCase();
+    }
+
+    roundedRectPath(ctx, x, y, w, h, r) {
+        if (typeof ctx.roundRect === "function") {
+            ctx.beginPath();
+            ctx.roundRect(x, y, w, h, r);
+            return;
+        }
+        ctx.beginPath();
+        ctx.moveTo(x + r, y);
+        ctx.lineTo(x + w - r, y);
+        ctx.arcTo(x + w, y, x + w, y + r, r);
+        ctx.lineTo(x + w, y + h - r);
+        ctx.arcTo(x + w, y + h, x + w - r, y + h, r);
+        ctx.lineTo(x + r, y + h);
+        ctx.arcTo(x, y + h, x, y + h - r, r);
+        ctx.lineTo(x, y + r);
+        ctx.arcTo(x, y, x + r, y, r);
+        ctx.closePath();
+    }
+
+    drawRoundedClip(ctx, x, y, w, h, r) {
+        this.roundedRectPath(ctx, x, y, w, h, r);
+        ctx.clip();
+    }
+
+    drawRoundedStroke(ctx, x, y, w, h, r) {
+        this.roundedRectPath(ctx, x, y, w, h, r);
+        ctx.stroke();
+    }
+
+    drawRoundedFill(ctx, x, y, w, h, r) {
+        this.roundedRectPath(ctx, x, y, w, h, r);
+        ctx.fill();
+    }
+}

resources/views/components/interview/call-controls.blade.php

@@ -28,7 +28,10 @@
     <x-button id="btn-start-recording" onclick="startCallRecording()" variant="secondary" icon="fa-solid fa-circle-dot" class="hidden">
         Record Call (Silent)
     </x-button>
-    <x-button id="btn-stop-recording" class="hidden" onclick="stopCallRecording()" variant="danger" icon="fa-solid fa-square" class="hidden animate-pulse" title="Stop &amp; Save Recording"></x-button>
+    <x-button id="btn-stop-recording" onclick="stopCallRecording()" variant="danger" class="hidden animate-pulse" title="Stop &amp; Save Recording">
+        <i class="fa-solid fa-square text-xs mr-1.5"></i>
+        <span>Recording <span id="rec-live-timer" class="font-mono text-xs font-bold">(00:00)</span> - Stop</span>
+    </x-button>
 
     <!-- 5. Leave Call -->
     <x-button id="btn-leave-call" onclick="leaveInterviewerCall()" variant="secondary" icon="fa-solid fa-arrow-right-from-bracket" class="hidden">

resources/views/components/interview/tabs/recordings-tab.blade.php

@@ -1,6 +1,11 @@
 <div id="tab-content-recordings" class="hidden">
-    <div class="text-[11.5px] text-slate-400 mb-2 font-medium">Saved candidate video sessions (sorted by newest first)</div>
+    <div id="modal-recordings-container" class="bg-slate-950/70 border border-slate-800 rounded-lg p-3 min-h-[220px] max-h-[420px] overflow-y-auto space-y-2.5 custom-scrollbar">
-    <div id="modal-recordings-container" class="bg-slate-950/70 border border-slate-800 rounded-lg p-3 min-h-[250px] max-h-[420px] overflow-y-auto">
+        <div class="flex flex-col items-center justify-center py-10 text-center">
-        <div class="text-slate-500 text-xs text-center pt-10">No video recordings saved for this candidate yet.</div>
+            <div class="w-10 h-10 rounded-xl bg-slate-900 border border-slate-800 flex items-center justify-center text-slate-500 mb-2.5">
+                <i class="fa-solid fa-video-slash text-sm"></i>
+            </div>
+            <p class="text-xs font-medium text-slate-400">No video recordings saved yet</p>
+            <p class="text-[11px] text-slate-500 mt-0.5 max-w-[240px]">Recordings captured during the call will appear here for download.</p>
+        </div>
     </div>
 </div>

routes/web.php

@@ -33,6 +33,7 @@
 Route::post('/candidate/submit-code/{id}', [InterviewController::class, 'submitCode'])->name('interview.submit');
 Route::post('/candidate/log-violation/{id}', [InterviewController::class, 'logViolation'])->name('interview.violation');
 Route::post('/candidate/upload-recording/{id}', [InterviewController::class, 'uploadRecording'])->name('interview.upload-recording');
+Route::post('/candidate/upload-recording-chunk/{id}', [InterviewController::class, 'uploadRecordingChunk'])->name('interview.upload-recording-chunk');
 Route::post('/candidate/upload-tab-screenshot/{id}', [InterviewController::class, 'uploadTabScreenshot'])->name('interview.upload-tab-screenshot');
 Route::post('/candidate/sync-code/{id}', [InterviewController::class, 'syncCandidateCode'])->name('interview.candidate.sync-code');
 Route::post('/candidate/notes/{id}', [InterviewController::class, 'saveCandidateNotes'])->name('interview.candidate.notes');