[FFmpeg-user] Copy all streams, what actually ffmpeg does?

Sub Phil phil4000n at gmail.com
Sat Jul 26 15:47:46 CEST 2014


What does ffmpeg actually do in copying streams??
ffmpeg -i movie.mp4 -c copy copied.mp4

Indeed, as I noticed, ffmpeg changes some metatag data, but what else
because, my input file is 326,736Kb while the output is larger and is

Rmk: copied.mp4 is MD5 equivalent to copied2.mp4:
ffmpeg -i movie.mp4 -c copy -map_metadata -1 copied2.mp4

So what kind of modification/fixing does ffmpeg do vs a file copy???



More information about the ffmpeg-user mailing list