Hi,

On Sun, 15. Aug 18:32, Adam Nielsen via ffmpeg-user wrote:
> Hi all,
> 
> I'm using the h264_v4l2m2m codec to do hardware accelerated encoding on
> a Raspberry Pi.  This is working well, except I am unable to set any
> encoder options such as bitrate, as I cannot find how to tell ffmpeg to
> set V4L2 control options.
> 

You can use -b:v option to set the bitrate, i.e.
./ffmpeg -i input -codec:v h264_v4l2m2m -b:v 2M out.mp4

There is a patch for documentation that I need to update. It may be useful
to you:
https://patchwork.ffmpeg.org/project/ffmpeg/patch/20200117034211.12142-1-andriy.gel...@gmail.com/

-- 
Andriy
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