"Paul" wrote

| Reinserting edited metadata information from the FFMETADATAFILE file
can
| be done as:
| @example
| ffmpeg -i INPUT -i FFMETADATAFILE -map_metadata 1 -codec copy OUTPUT
| @end example
|

That looks fine. I ended up with something slightly different:

ffmpeg -y -i "C:\windows\desktop\SNL2.mp4" -f ffmetadata -map_metadata g
metadata.txt

Without the map_metadata it doesn't extract creation time.


| Their suggestion of "-codec copy" should be slightly better than
| my "-c:v copy -c:a copy" suggestion, as their method might copy
| more of the streams. There might even be a need to copy subtitles
| with some other trick.
|

I've tried it with a number of MP4 and MP3, resulting in
identical file sizes and nearly identical metadata. I looked
in their docs at -codec but I can't say I understand the
difference.