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Chrome - Audio looses synchronization after few transitions

We use "#EXT-X-DISCONTINUITY" for transitioning from one asset to other. After few of this tags player loosed synchronization.

Here is a link for testing:


We can reproduce this problem on all platforms (Mac,Windows, iOS, Android)

Please help.


<html> <head> <script type="text/javascript" src=""></script> </head> <body> <video controls height="400" width="550" src="" data-viblast-key="A3EG3O59B1" data-viblast-he-aac="true" data-viblast-enable-realtime-logger="true" autoplay > </video> </body> </html>

1 Comment


Viblast Player supports EXT-X-DISCONTINUITY tag and the issue you have is not related to it.

Chrome has well known bug with the audio/video sync, when the audio stream has a different length from the video stream. In your case, the "live" stream is constructed by a couple of short streams. I guess one of them has different audio and  video stream length. Even the difference is 1-2 ms, during the long playback you will be able to see the lip sync. As this is a Chrome decoder issue, Viblast Player can not handle it, but there is a workaround. It is possible to force Chrome to sync audio/video streams from JS, by performing a "seek" operation to the "currentTime" . If you execute the code from console:


you will see that the lip sync disappears. 

In your case, you can create a timer function, which can be executed on every 1-2 minutes and calls the code above.

Best regards,

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