How to play a video in a Seamless loop using media source extensions
Question
I am working on media source extension to play the video in a seamless loop without any delay. I have done an extensive r&d about it and also done different things. Now i am working on this code
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
</head>
<body>
<video controls></video>
<script>
var video = document.querySelector('video');
var assetURL = 'test1.mp4';
// Need to be specific for Blink regarding codecs
// ./mp4info frag_bunny.mp4 | grep Codec
var mimeCodec = 'video/mp4; codecs="avc1.42E01E, mp4a.40.2"';
if ('MediaSource' in window && MediaSource.isTypeSupported(mimeCodec)) {
var mediaSource = new MediaSource;
//console.log(mediaSource.readyState); // closed
video.src = URL.createObjectURL(mediaSource);
mediaSource.addEventListener('sourceopen', sourceOpen);
} else {
console.error('Unsupported MIME type or codec: ', mimeCodec);
}
function sourceOpen (_) {
//console.log(this.readyState); // open
var mediaSource = this;
var sourceBuffer = mediaSource.addSourceBuffer(mimeCodec);
fetchAB(assetURL, function (buf) {
sourceBuffer.addEventListener('updateend', function (_) {
mediaSource.endOfStream();
video.play();
//console.log(mediaSource.readyState); // ended
});
sourceBuffer.appendBuffer(buf);
});
};
function fetchAB (url, cb) {
console.log(url);
var xhr = new XMLHttpRequest;
xhr.open('get', url);
xhr.responseType = 'arraybuffer';
xhr.onload = function () {
cb(xhr.response);
};
xhr.send();
};
</script>
</body>
</html>
It is working fine but the video is playing again with a slight delay. I want to play the video without any delay and I know that it is possible with media source extensions but after spending a lot of time still didn't get any idea that how to do it. Any help would be really appreciated. Thanks
4 answers
solution1
1 2019-12-30 06:25:28
将mode值设置为sequence对我有用，它可以确保连续的媒体播放，无论媒体片段时间戳是否不连续。
sourceBuffer.mode = 'sequence';
solution2
0 2020-01-01 12:02:04
May be this code solve Your Problem ....play the video in a seamless loop without any delay
for (let chunk of media) {
await new Promise(resolve => {
sourceBuffer.appendBuffer(chunk.mediaBuffer);
sourceBuffer.onupdateend = e => {
sourceBuffer.onupdateend = null;
sourceBuffer.timestampOffset += chunk.mediaDuration;
console.log(mediaSource.duration);
resolve()
}
})
}
if you need more information visit this link..... http://www.esjay.org/2020/01/01/videos-play-without-buffering-in-javascript/
solution3
0 2022-05-23 03:39:32
You can't really do that because it really depends on how fast your PC runs. Its delay should only be there if you have a slow PC but if not it shouldn't have a noticeable delay. Maybe the video that you have is big or it just delays inside the video because only thing I could tell you is autoplay loop inside the videos element as a attribute unless you find a way to replay the video before the video ends but even if it doesn't delay for you it may delay big or just play over the video for others
solution4
0 2022-05-27 09:08:51
@CoolOppo
The simplest thing to do is to just rewind the video when it reaches it's end time (duration).
See demo here: https://vc-lut.000webhostapp.com/demos/public/mse_loop_example1.html
(to play video just click the picture part, since no controls for looping background)
The code:
<!DOCTYPE html>
<html>
<head> <meta charset="utf-8"/> </head>
<body>
<div>
<video id="video_mse" > </video>
</div>
<script>
var assetURL = "testloop.mp4";
//# use correct mime/codecs or else Error is "source not open"...
var mimeCodec = 'video/mp4; codecs="avc1.42C01E"';
var mediaSource; var sourceBuffer;
var video = document.getElementById( "video_mse" );
video.onclick = vid_togglePlay; //# for playing/pausing
video.ontimeupdate = vid_checkTime; //# for looping
//# handle play/pause (because controls are hidden)
function vid_togglePlay()
{
if( video.paused == true ) { video.play(); }
else { video.pause(); }
}
//# handle looping...
function vid_checkTime()
{
if( video.currentTime == video.duration)
{
video.currentTime = 0;
video.play();
}
}
if ( 'MediaSource' in window && MediaSource.isTypeSupported(mimeCodec) )
{
mediaSource = new MediaSource;
video.src = URL.createObjectURL(mediaSource);
mediaSource.addEventListener('sourceopen', sourceOpen);
}
else
{ console.error('Unsupported MIME type or codec: ', mimeCodec); }
function sourceOpen()
{
//console.log(this.readyState); // open
var mediaSource = this;
sourceBuffer = mediaSource.addSourceBuffer(mimeCodec);
fetchAB(assetURL, function (buf) {
sourceBuffer.addEventListener('updateend', function() {
mediaSource.endOfStream();
video.play();
});
sourceBuffer.appendBuffer(buf);
});
};
function fetchAB (url, callbackfunc )
{
console.log("loading file: " + url);
var xhr = new XMLHttpRequest;
xhr.open('get', url);
xhr.responseType = 'arraybuffer';
xhr.onload = function() { callbackfunc( xhr.response ); }
xhr.send();
}
</script>
</body>
</html>
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