Re: [FFmpeg-devel] [PATCH] Added support for MB_INFO

["Carotti, Elias" <eliascrt@amazon.it>]

Hi,

extending AVVideoEncParams was the first hypothesis I made but it
didn't seem it was the proper place to add the mb_info flags.

I may be wrong but my impression is that AVVideoEncParams is used to
carry encoding parameters read from the bitstream at the decoder side
while here were going the other direction, i.e., were passing
information from the application to the encoder.

Secondly, mb_info can't be strictly considered encoding parameters and
it's not present in the bitstream at all. 
It's just a way to give hints to the libx264 encoder on which
macroblock we know have not changed since the previous frame and could
be coded as P_SKIPs. Libx264 however, may or may not oblige according
to its logic, and this specific information is not transmitted in the
bitstream nor can be recovered at the decoder.

Elias



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From: ffmpeg-devel <ffmpeg-devel-bounces@ffmpeg.org> on behalf of Anton
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Sent: Saturday, June 18, 2022 5:06 PM
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Subject: RE: [EXTERNAL][FFmpeg-devel] [PATCH] Added support for MB_INFO

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Quoting Carotti, Elias (2022-06-17 10:41:30)
> Hi all,
> any chance someone could possibly have a look at this patch, please?
> Thanks in advance

This looks like it belongs in AVVideoEncParams.

--
Anton Khirnov
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