Steps to reproduce: * Enable WebM MSE * Navigate to link Actual results: Playback stalls at 19 seconds Expected results: Video plays through

what resolution was it using at the time? can you reproduce if you force the resolution to a specific value ; if so, which resolution?

WFM with any of the resolutions. I try with the following: start the video, let it play sees if it stalls @19s : nope Seek to 0, set resolution to [240,360,480], let it play to see if it stalls at 19s: nope.

I reproduced it, but not a stall, just no audio: Dumping data for demuxer 1461deab0: Dumping Audio Track Buffer(audio/mp4a-latm): - mLastAudioTime: 17.716825 NumSamples:10596 Size:6384370 NextGetSampleIndex:763 NextInsertionIndex:10596 Buffered: ranges=[(0.000000, 20.015600), (40.007959, 266.031020)] Dumping Video Track Buffer(video/webm; codecs=vp9) - mLastVideoTime: 17.184000 NumSamples:6377 Size:10799089 NextGetSampleIndex:412 NextInsertionIndex:6377 Buffered: ranges=[(0.000000, 265.973000)] what is very surprising however, is that it didn't stall despite the lack of audio, it should have

STR: Seek to 0. Pause. Change resolution to 360p. It's the 360p stream that has issues.

The cause for the stall is bug 1199573. However, with that fixed, I now get a demuxing error upon parsing video range 194611000 to 195194000.

Looks like 360p is your resolution of choice. I must have a slow Internet connection or at least competition for using it.