[Cin] Found hw transcoding line for ffmpeg!

[Andrew Randrianasulu]

пт, 25 апр. 2025 г., 22:38 Андрей Спицын via Cin <cin at lists.cinelerra-gg.org
>:

> >and h264->hevc at 90 fps
>
> Oh, that's amazing!
>
> I should definitely try it on my rx6600.
>


And this line scales from FHD to 4k on gpu and encodes at nearly 40 fps!

./ffmpeg -hwaccel_output_format vaapi  -hwaccel vaapi  -i
~/botva/vid/MMC_14_may_2011_four_pilot_whales.mp4 -vf scale_vaapi=-2:2160
-c:a copy -c:s copy -c:v hevc_vaapi -f mp4 /dev/null

exact vaapi_scale line from

https://stackoverflow.com/questions/69243696/ffmpeg-vaapi-scale-a-video-keeping-the-aspect-ratio-and-padding-with-black-lin

h264 encodes in this scenario at 10 fps.

And vaapi_tonemap asserts in mesa:

./ffmpeg -hwaccel_output_format vaapi  -hwaccel vaapi  -i
~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov  -vf
tonemap_vaapi  -c:a copy -c:s copy -c:v h264_vaapi -f mp4 /dev/null


ffmpeg: ../src/gallium/frontends/va/surface.c:1394:
vlVaQueryVideoProcFilterCaps: Assertion `0' failed.

 Aborted



> Regards,
> Andrey
>
> пт, 25 апр. 2025 г., 22:34 Andrew Randrianasulu via Cin <
> cin at lists.cinelerra-gg.org>:
>
>> ./ffmpeg -hwaccel_output_format vaapi -hwaccel vaapi -i
>> ~/New_hdd/Swimming\ with\ orca\ in\ New\ Zealand-JQ3mDXF3bcE.mkv -c:a copy
>> -c:s copy -c:v h264_vaapi -f mp4   /dev/null -loglevel verbose
>>
>>
>> main detail missing was "-hwaccel_output_format vaapi".
>>
>> with it I can transcode h264->h264 FHD at 42 fps and h264->hevc at 90 fps
>> (know feature of Polaris based encoder at least under Linux).
>> --
>> Cin mailing list
>> Cin at lists.cinelerra-gg.org
>> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>>
> --
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> Cin at lists.cinelerra-gg.org
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>
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