[FFmpeg-user] understanding copy flag

David Overcash funnylookinhat at gmail.com
Mon May 16 15:05:16 CEST 2011

Some codecs don't play nicely with copy...  Also - why would you essentially
run "cp original.avi output.avi" through FFMPEG?  Is there something else
you're trying to accomplish?  If so then we might be able to help a bit
more... :)

On Sun, May 15, 2011 at 10:20 PM, Rick C. <rickcorteza at gmail.com> wrote:

> Hello,
> I was making a few tests using the following syntax:
> ffmpeg -i original.avi -acodec copy -vcodec copy output.avi
> To my surprise the results were not very good (mainly just the audio side I
> believe).  Am I wrong in thinking this should work as a passthrough?  I
> tried the same with .mp4 and .mpg and the results were what I expected.  I
> didn't notice anything significant from the output log so I didn't post
> anything.  Any advice would be great.  Thanks!
> rc
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