[FFmpeg-user] comparison of apparently same media files …

[Roger Pack]

>  Is there a way to use ffmpeg to see what is different in the files,
> and if the difference lies in some metadata or it is just some other
> kind of corruption?
>
>  What do you think is going on here?

My guess is header differences.  The "diff" utility might be useful.
Also ffmpeg has a "showinfo" filter that should print out md5's of
packets (or you could possibly use ffprobe -show_packets) so you could
run that on both files, compare.