Should the mp4-generator support stts and other atoms? about mux.js

[imbcmdth]

We have experimental support for the edit-list atoms though it seems like all the major MSE implementations ignore them. We don't have any immediate plans to implement the stts atoms. I'm not sure they would help here - I've tried setting them and ctts and neither seem to help.

The problem with the stream is missing video and audio frames. The missing video frames are already "handled" by mux.js - we pull the next frame forward in time (it starts earlier) to cover the gap. The problem here is really the audio frames. The same trick of extending the sample duration does not work.

The audio decoder in Chrome is really, really dumb. Instead of honoring the various offsets it just puts samples after samples as tightly packed as possible without allowing for gaps.

Setting the sample_composition_time_offset for audio samples in the trun actually does work in Firefox but not in Chrome, unfortunately. In Firefox, the spaces are simply silent. It is a shame because that would be preferable to manually inserting silence which I think is currently the best solution.

[forbesjo]

Closing as answered

[Ivshti]

@imbcmdth where is the experimental implementation?