[Webkit-unassigned] [Bug 200949] Media Source Extensions performance during seek

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=200949

--- Comment #10 from Jer Noble <jer.noble at apple.com> ---
All that said, if I were you, I'd do some experimenting with re-writing your mp4 stream so that, even when playback was proceeding visually in the negative direction, you keep appending I-frames whose PTSs monotonically increased. Since all your samples are I-frames, this should be trivial re-muxing work without having to re-encode anything. Then rather than seeking at 60fps, you could just modulate the media's forward playback rate to achieve your desired "play backwards" behavior.  It would mean having to re-mux whenever the user changed playback direction with a swipe, but that should be much less expensive than repeatedly seeking.

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