FFV1 Valid Version
This test checks is the FFV1 version (and optionally the microversion) are defined as experimental. At the time of this writing version 2, 3.0, 3.1, 3.2, and 3.3 are experimental versions of FFV1 and not intended for use in production.
ffmpeg -f lavfi -i testsrc2=s=120x80 -f lavfi -i sine -c:a flac -ar 8000 -vframes 2 -c:v ffv1 -level 2 -strict experimental -c:a flac -g 1 -y FFV1-VALID-VERSION.mkv