[FFmpeg-user] Unsupported codec with id 0 for input stream 1

[Carl Eugen Hoyos]

Eugene Gekhter <egekhter <at> pixcel.com> writes:

> The 16 fps output clip seems to have thrown away 
> certain frames and duplicated other frames to 
> maintain sync with the original 24 fps clip.

I don't think this is possible with -vcodec copy.

We can be sure if you provide "-f null -" output 
for the original file, the first copy and the 
copy with -r.

Carl Eugen