[Bug 104920] Broken hardware video encoding with vaapi/ffmpeg

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104920

--- Comment #3 from Luke McKee <hojuruku at gmail.com> ---
it's -profile v: constrained_baseline --level 3.1 or 3.0 on newer ffmpeg
versions.

Even with that I'm having corrupted encoding so I'll open a new ticket.

As a favour can you test your hardware encoded videos with totem (it uses
gstreamer) and see if they load. vlc says the first 2 frames don't work but
plays, and mpv can play it fine. Hardware players also bork at the encoded
content. This is the ffmeg command line I'm using...

GST_DEBUG=3 reports this:
qtdemux qtdemux.c:9719:qtdemux_parse_trak:<qtdemux0> Track shorter than 20%
(2881879/24000 vs. 5834998/1000) of the stream found, assuming preview image or
something; skipping track

ffmpeg -hwaccel vaapi -hwaccel_device /dev/dri/renderD128
-hwaccel_output_format vaapi -ss 120 -t 120 -i a-movie.mkv -map 0:0 -map 0:1
-c:v h264_vaapi -b:v 4000k -qp 20 -bf 0 -profile:v 578 (or constrained_baseline
in ffmpeg-git) -movflags +faststart -quality:v 0 -level:v 3.1 -coder:v cavlc
-c:a aac -ab 128k -ar 48000 -ac 2 vaapitest.mp4

Here's the full specs on the created ffmpeg file using ffprobe:

https://pastebin.com/TRVM9XiH

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