1422660 - Frames displayed out of order on Windows

Status: NEW

(Core :: Audio/Video: Playback, defect, P2)

Description

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

Steps to reproduce:

* Ensure hardware video decoding is working
* Navigate to https://www.jwz.org/blog/2017/10/anime-floppy-disks/

Expected results:

Videos should play smoothly

Actual results:

Video frames out of sequence. It is easy to spot on the 2nd video on the 2nd row.

Comment 1

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

I did a mozregression and got https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=acacb9c914f1deb3cc6f879abc8587d6a023b9f6&tochange=3118b9ee9db8f10d53b9352efe3796b917b8930e

Bug 1371202 is a likely suspect given that it relates to looping video.

Comment 2

[JW Wang [:jwwang] [:jw_wang]]

What bug 1371202 did is not releasing the underlying decoders if looping is on. It is exactly the same behavior we had before any optimization is applied to release decoders to save memory/CPU. I will give it a try when I get a Windows machine.

Comment 3

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

(In reply to JW Wang [:jwwang] [:jw_wang] from comment #2)
> What bug 1371202 did is not releasing the underlying decoders if looping is
> on. It is exactly the same behavior we had before any optimization is
> applied to release decoders to save memory/CPU. I will give it a try when I
> get a Windows machine.

Perhaps something is racing when we seek back to the beginning.

Comment 4

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

I've seen this on YouTube on the same machine when starting VP9 playback on YouTube.