GNU bug report logs - #39719
FFmpeg library preference for dav1d

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Leo Famulari <leo <at> famulari.name>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#39714: closed (Real-time AV1 playback in VLC)
Date: Fri, 20 Mar 2020 22:55:02 +0000

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Your message dated Fri, 20 Mar 2020 18:54:51 -0400
with message-id <20200320225451.GA20888 <at> jasmine.lan>
and subject line Re: bug#39719: Acknowledgement (FFmpeg library preference for dav1d)
has caused the debbugs.gnu.org bug report #39719,
regarding Real-time AV1 playback in VLC
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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39719: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=39719
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From: Leo Famulari <leo <at> famulari.name>
To: guix-patches <at> gnu.org
Subject: Real-time AV1 playback in VLC
Date: Fri, 21 Feb 2020 11:25:58 -0500

On my Thinkpad x230, VLC cannot play back AV1 videos in real-time. They
stutter and drop frames.

This is because our VLC's AV1 playback is being provided by FFmpeg,
which by default chooses libaom, which is too slow.

By building VLC with the dav1d AV1 decoder, VLC chooses to use dav1d for
playback, and everything is fine.

Here are some AV1 samples; I like the 1080 "Summer Nature" clip:

https://www.elecard.com/videos

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From: Leo Famulari <leo <at> famulari.name>
To: 39719-done <at> debbugs.gnu.org
Subject: Re: bug#39719: Acknowledgement (FFmpeg library preference for dav1d)
Date: Fri, 20 Mar 2020 18:54:51 -0400

I pushed fixes for FFmpeg and VLC as commit
f08040c5f864df1e85573172aa921e42ceef6859.

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