[FFmpeg-user] Default `-context` when encoding as FFV1 level 1

[Kal Sze]

Hello,

What's the default value of the `-context` option when encoding as FFV1
level 1? It doesn't seem to be reflected in the console output of the
ffmpeg command line, and it's not documented at
https://trac.ffmpeg.org/wiki/Encode/FFV1 either.

Best Regards,
Kal