[FFmpeg-user] Image extraction broken with ffmpeg, but not with mencoder. How can I fix this?

Paul B Mahol onemda at gmail.com
Tue Sep 3 00:21:12 CEST 2013

On 9/2/13, James Board <jpboard2 at yahoo.com> wrote:
>>Why you think this is bug?
>>By default ffmpeg creates cfr output.
>>So probably your input is vfr and that is why some frames are duplicated.
> So then what is it?  A feature?  You've got to be joking.
> This is the simplest possible video processing task: convert
> an uncomressed raw video file to the correct sequence of images.
> Don't complain when I still use mencoder for my video
> tasks.  If ffmpeg can't get the simplest of all possible video tasks
> right, that makes you wonder how many more things
> are incorrect, but people just don't notice.
> Are you really tryng to help?  CFR?  VFR?  The source is uncompressed
> raw video!  The output is (should be) a sequence of images, one for each
> frame in the input video.  Where does CFR or VFR even come into play?

Because you never posted actual commands I'm left to guessing.

Try adding "-vsync 0".

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