[FFmpeg-user] Image extraction broken with ffmpeg, but not with mencoder. How can I fix this?
Paul B Mahol
onemda at gmail.com
Wed Sep 4 19:42:14 CEST 2013
On 9/4/13, James Board <jpboard2 at yahoo.com> wrote:
>>If input frame rate is smaller than output frame rate, ffmpeg will create
>>extra frames by default.
>>If input is vfr and output is cfr than it may duplicate and/or remove
> Everyone keeps mentioning vfr and cfr. I know what vfr and cfr mean but
> I don't see how that has anything to do with my issue, because I'm not
> creating a video as output. I'm only creating images for every frame in
> the input. So, can someone explain why this matters?
> I understand the fact that if the output is cfr and the input is vfr, then
> some frames may need to be duplicated or dropped. But if the output is
> merely a sequence of images, why does this matter? There's no frame rate
> in a sequence of images,
Except it is. What you are using is not simple & dumb frame extraction tool.
So before making such assumptions consult documentation.
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