On 11/25/2022 8:26 PM, Dong, Ruijing wrote:
[AMD Official Use Only - General]

Will it make sense to accept P010 input, however encode to h264 8bit?

If it works (the encoder accepts the 10 bit input even if it encodes it as 8bit), then i don't see why not. I assume it would also be faster than using swscale to convert said 10bit input to nv12 before passing that to the encoder.

Removing support for a pixel format as input in an encoder needs a reason other than "It's rarely used", more so when it's a single line. It either needs to not work, or somehow get in the way of further improvements.


Thanks,
Ruijing

-----Original Message-----
From: ffmpeg-devel <ffmpeg-devel-boun...@ffmpeg.org> On Behalf Of James Almer
Sent: Friday, November 25, 2022 6:25 PM
To: ffmpeg-devel@ffmpeg.org
Subject: Re: [FFmpeg-devel] [PATCH] lavc/qsvenc_h264: don't support P010 format

On 11/25/2022 8:20 PM, Soft Works wrote:


-----Original Message-----
From: ffmpeg-devel <ffmpeg-devel-boun...@ffmpeg.org> On Behalf Of
James Almer
Sent: Friday, November 25, 2022 8:48 PM
To: ffmpeg-devel@ffmpeg.org
Subject: Re: [FFmpeg-devel] [PATCH] lavc/qsvenc_h264: don't support
P010 format

On 11/25/2022 3:03 PM, Soft Works wrote:


-----Original Message-----
From: ffmpeg-devel <ffmpeg-devel-boun...@ffmpeg.org> On Behalf Of
Anton Khirnov
Sent: Friday, November 25, 2022 2:46 PM
To: FFmpeg development discussions and patches <ffmpeg-
de...@ffmpeg.org>
Cc: Haihao Xiang <haihao.xi...@intel.com>
Subject: Re: [FFmpeg-devel] [PATCH] lavc/qsvenc_h264: don't
support
P010 format

Why?

It's rarely used. There's not even a hwaccel that can decode this.

The dxva2/d3d11 hwaccels seemingly do

No, only for HEVC and VP9. Probably for AV1 as well  in the near future.

Well, then that is a good reason to not remove support in this encoder for a 
pixel format that not only our software scaler can generate, but decoders using 
hwaccel backends can output too.
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