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av-merge: buffer same duration of audio and video

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Signed-off-by: Jesús <heckyel@hyperbola.info>
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James Taylor 2021-08-27 19:39:44 -07:00 committed by Jesús
parent ae68c84a26
commit 81e61f9893
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GPG Key ID: F6EE7BC59A315766
1 changed files with 10 additions and 4 deletions
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14
youtube/static/js/av-merge.js
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@ -29,6 +29,10 @@ function avInitialize(...args){
function AVMerge(video, srcPair, startTime){ function AVMerge(video, srcPair, startTime){
this.videoSource = srcPair[0]; this.videoSource = srcPair[0];
this.audioSource = srcPair[1]; this.audioSource = srcPair[1];
if (this.videoSource.bitrate && this.audioSource.bitrate)
this.avRatio = this.audioSource.bitrate/this.videoSource.bitrate;
else
this.avRatio = 1/10;
this.videoStream = null; this.videoStream = null;
this.audioStream = null; this.audioStream = null;
this.seeking = false; this.seeking = false;
@ -64,8 +68,10 @@ AVMerge.prototype.sourceOpen = function(_) {
if (this.opened) if (this.opened)
return; return;
this.opened = true; this.opened = true;
this.videoStream = new Stream(this, this.videoSource, this.startTime); this.videoStream = new Stream(this, this.videoSource, this.startTime,
this.audioStream = new Stream(this, this.audioSource, this.startTime); this.avRatio);
this.audioStream = new Stream(this, this.audioSource, this.startTime,
this.avRatio);
this.videoStream.setup(); this.videoStream.setup();
this.audioStream.setup(); this.audioStream.setup();
@ -116,7 +122,7 @@ AVMerge.prototype.videoEndOfStream = function() {
this.videoEndOfStreamCalled = true; this.videoEndOfStreamCalled = true;
} }
function Stream(avMerge, source, startTime) { function Stream(avMerge, source, startTime, avRatio) {
this.avMerge = avMerge; this.avMerge = avMerge;
this.video = avMerge.video; this.video = avMerge.video;
this.url = source['url']; this.url = source['url'];
@ -124,7 +130,7 @@ function Stream(avMerge, source, startTime) {
this.mimeCodec = source['mime_codec'] this.mimeCodec = source['mime_codec']
this.streamType = source['acodec'] ? 'audio' : 'video'; this.streamType = source['acodec'] ? 'audio' : 'video';
if (this.streamType == 'audio') { if (this.streamType == 'audio') {
this.bufferTarget = 5*10**6; // 5 megabytes this.bufferTarget = avRatio*50*10**6;
} else { } else {
this.bufferTarget = 50*10**6; // 50 megabytes this.bufferTarget = 50*10**6; // 50 megabytes
} }