video/external: Bump OpenH264 to 2.5.0

[torokati44]

I suppose we can wait with this until FlatHub also updates org.freedesktop.Platform.openh264, so our Flatpak app doesn't regress.

Also note that this adds (untested) Windows on ARM64 support!

See for changelog: https://github.com/cisco/openh264/releases/tag/v2.5.0

[kjarosh]

Filed an issue: https://gitlab.com/freedesktop-sdk/openh264-extension/-/issues/20

[torokati44]

Also I think 2.5.0 yields frames later than 2.4.1, will have to investigate further and report upstream...
EDIT: This may be related to cisco/openh264#3752, but I'm not sure yet.

[tsunamistate]

@kjarosh @torokati44 issue to update flatpak OpenH264 extension was closed, and it was updated!

[normalcea]

Hi, I am one of the maintainers of the ruffle package in nixpkgs, this version bump would make our package code much cleaner as nixpkgs master has openh264 2.5.0.

Thank you.

[torokati44]

I was thinking of creating a small standalone C program that decodes the frames in the h264 visual test FLV using 2.4.1 and 2.5.0, to use it to file a bug report to OpenH264 about the increased latency... But tiiimeee... 😮‍💨

[torokati44]

The raw config and frame data are already available in byte array literal form here: https://bugzilla.mozilla.org/show_bug.cgi?id=1896869 (in the test_standalone.html attachment)