[FFmpeg-devel] [PATCH] Setup for extracting quantization parameters from encoded streams

[Moritz Barsnick]

On Fri, Jul 19, 2019 at 10:00:52 +0200, Nicolas George wrote:
> I do not judge whether this filter would be useful and should be
> included, but if so, then I would appreciate that the output be done
> using AVIO, so that it can go to any supported protocol.

The metadata filter has a nice example of how to use avio, incl.
mapping to stdout:

https://github.com/FFmpeg/FFmpeg/blob/f102a4efcef33014d414f9bf4492a04feab20c82/libavfilter/f_metadata.c#L250

I suppose this can been used as a reference.

Moritz