[Feature] full scan using ffmpeg

[jakepog]

Is your feature request related to a problem? Please describe.
The problem I encountered is that video files were not completely transferred and so not playing fully (sometimes containing gaps of 5-10 minutes), yet ffprobe marked these files as having no issues.

Describe the solution you'd like
Full analysis of files using ffmpeg.

Describe alternatives you've considered
Manually running ffmpeg on newly copied files which was able to identify the issue.

Additional context
Use the same database of a quick or full check.

[aetaric]

@jakepog do you happen to have details on what command you ran to id these and problem files and what the output was in ffmpeg? I'd like to get this into the 3.4.0 release

[jakepog]

The code I now run manually, after navigating into the appropriate folder:

find . -name "*.mkv" -exec sh -c "echo '{}' >> ../../../root/errors.log; ffmpeg -v error -i '{}' -map 0:1 -f null - 2>> ../../../root/errors.log" \;

I cannot recall the error sorry, and no longer have any files that have errors to replicate.

By trial and error I made code from this stack overflow post.

[aetaric]

I should be able to get something going based on that, thanks! Currently planning to have this land in 3.5.0 if there's no issue with the implementation.