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fix: multiple audio track issue

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kushal.saha 2026-08-06 12:47:10 +00:00
parent 686cebe577
commit 2c0f2a4a41
1 changed files with 48 additions and 12 deletions
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56
resources/views/interview/index.blade.php
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@ -2149,6 +2149,7 @@ function endCallForAll() {
// --- SILENT CALL RECORDING ENGINE FOR INTERVIEWERS & ADMINS ---
let adminMediaRecorder = null;
let adminRecordedChunks = [];
let recAudioContext = null;
function startCallRecording() {
if (!currentInterviewId) {
@ -2160,29 +2161,60 @@ function startCallRecording() {
let candidateStream = (candVid && candVid.srcObject) ? candVid.srcObject : null;
let streamToRecord = new MediaStream();
// Add live Candidate Video and Audio tracks
// 1. Add Video Track (Candidate video or Interviewer fallback)
if (candidateStream) {
candidateStream.getTracks().forEach(track => {
candidateStream.getVideoTracks().forEach(track => {
if (track.readyState === 'live') {
try { streamToRecord.addTrack(track); } catch(e) {}
}
});
}
// Add Interviewer Local Microphone Audio track for 2-way call recording
if (interviewerLocalStream) {
interviewerLocalStream.getAudioTracks().forEach(track => {
if (track.readyState === 'live' && !streamToRecord.getAudioTracks().includes(track)) {
try { streamToRecord.addTrack(track); } catch(e) {}
}
});
if (streamToRecord.getVideoTracks().length === 0) {
if (streamToRecord.getVideoTracks().length === 0 && interviewerLocalStream) {
interviewerLocalStream.getVideoTracks().forEach(track => {
if (track.readyState === 'live') {
try { streamToRecord.addTrack(track); } catch(e) {}
}
});
}
// 2. Mix Multiple Audio Tracks into a SINGLE Audio Track via Web Audio API
// (MediaRecorder standard throws DOMException if streamToRecord has >1 audio track)
const candAudioTracks = candidateStream ? candidateStream.getAudioTracks().filter(t => t.readyState === 'live') : [];
const adminAudioTracks = interviewerLocalStream ? interviewerLocalStream.getAudioTracks().filter(t => t.readyState === 'live') : [];
if (candAudioTracks.length > 0 || adminAudioTracks.length > 0) {
try {
const AudioContextClass = window.AudioContext || window.webkitAudioContext;
if (recAudioContext) {
try { recAudioContext.close(); } catch(e) {}
}
recAudioContext = new AudioContextClass();
const audioDestination = recAudioContext.createMediaStreamDestination();
if (candAudioTracks.length > 0) {
const candAudioStream = new MediaStream(candAudioTracks);
const candSource = recAudioContext.createMediaStreamSource(candAudioStream);
candSource.connect(audioDestination);
}
if (adminAudioTracks.length > 0) {
const adminAudioStream = new MediaStream(adminAudioTracks);
const adminSource = recAudioContext.createMediaStreamSource(adminAudioStream);
adminSource.connect(audioDestination);
}
const mixedAudioTrack = audioDestination.stream.getAudioTracks()[0];
if (mixedAudioTrack) {
streamToRecord.addTrack(mixedAudioTrack);
}
} catch(e) {
console.warn('Web Audio API mixing fallback:', e);
const fallbackAudio = candAudioTracks[0] || adminAudioTracks[0];
if (fallbackAudio) {
try { streamToRecord.addTrack(fallbackAudio); } catch(err) {}
}
}
}
const activeTracks = streamToRecord.getTracks().filter(t => t.readyState === 'live');
@ -2215,6 +2247,10 @@ function startCallRecording() {
};
adminMediaRecorder.onstop = function() {
if (recAudioContext) {
try { recAudioContext.close(); } catch(e) {}
recAudioContext = null;
}
if (adminRecordedChunks.length === 0) return;
const recMime = adminMediaRecorder.mimeType || 'video/webm';
const isMp4 = recMime.includes('mp4');