[Cin] 10bit VAAPI encoding preset

[Andrew Randrianasulu]

ср, 13 нояб. 2024 г., 17:54 Terje J. Hanssen <terjejhanssen at gmail.com>:

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> Den 13.11.2024 14:31, skrev Andrew Randrianasulu:
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> ср, 13 нояб. 2024 г., 15:17 Terje J. Hanssen via Cin <
> cin at lists.cinelerra-gg.org>:
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>> After finishing the three hevc_qsv presets for _8b420, _10b420 and
>> _10b422 mp4
>> https://lists.cinelerra-gg.org/pipermail/cin/2024-November/009039.html
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>> I thought to do the corresponding for hevc_vaapi
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>> However I am struggling to get 10bit 422 output rendered from Cingg,
>> which so far falls back to 10bit 420 chroma subsampling
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>> fprobe -hide_banner hd01_hevc_vaapi_10b422.mp4
>>   Duration: 00:01:11.20, start: 0.000000, bitrate: 11082 kb/s
>>   Stream #0:0[0x1](und): Video: hevc (Main 10) (hev1 / 0x31766568),
>> yuv420p10le(tv, bt709/unknown/unknown, top coded first (swapped)),
>> 1920x1080 [SAR 1:1 DAR 16:9], 11080 kb/s, 25 fps, 25 tbr, 12800 tbn
>> (default)
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>> In a previous thread I proved that ffmpeg hevc_vaapi encoding has this
>> 10bit-422 capability
>> 3) 10-bit yuv422p10le hevc_vaapi encoding using -vf 'format=y210,hwupload'
>> https://lists.cinelerra-gg.org/pipermail/cin/2024-November/008982.html
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>> And yes, there was also issues before hevc_qsv_10b422.mp4 combinations
>> Pixel format/profile finally succeeded.
>> But here are some differences, yet. While hevc_qsv provided a Pixels drop
>> down menu with pixel formats,
>> hevc_vaapi just has a single "vaapi" pixel format.
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>> Any idea why, and what can fulfill the vaapi 10bit 422 encoding here?
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> I have some idea (hack add some pixel formats to hevc_vaapi, will only be
> usable with internal ffmpeg)
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> Just to clarify: my tests vaapi tests and qsv tests are run on Cingg with
> the onevpl patch and internal ffmpeg
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> but for now you can try to modify same place my 10bit encoding patch
> modified, just with yuv422p10 instead of 420p10.
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> Exactly how and where?
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there should be line (after you patch cingg with 10bit patch) in
cinelerra/ffmpeg.C

if (tenbit_enc) frames_ctx->sw_format =  AV_PIX_FMT_P010LE;

you need to replace AV_PX_FMT part...

with AV_PIX_FMT_Y210LE ?

recompile cingg

now when you set

export CIN_10BIT_ENC=1

before launching cin

it *may be* will give you y422 10bit encoding for hevc_vaapi.


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> sorry, a bit busy with other issues.
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