[FFmpeg-soc] access to input file metadata from within avfilter?

[Norbert Burger]

Hi folks,

Is there a recommended way to inspect AVStream metadata for my input
file from within filter code?

Looking through the SOC code, it's not clear to me whether the recommended
method is re-opening/re-parsing the file (ala vsrc_movie.c), or if
there's a simpler way.

Thanks,
Norbert