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

Nicolas George nicolas.george at normalesup.org
Thu Sep 5 20:03:47 CEST 2013

Le nonidi 19 fructidor, an CCXXI, James Board a écrit :
> Just tell me how to calculate the timestamps for S and E.

For the last time, you do not calculate the timestamps. The timestamps are
properties of the frames, you just read them, nothing more.

> I was joking.  You miss the point.  If I want to start my edit on the 10th
> frame,

No, you do not want to start your edit on the 10th frame, you want to start
your edit at a frame that has a specific timestamp.

> for example and my video is 29.97 fps

No, your video is not 29.97 fps; it has probably 1001/30000 as a time base.

> What happens if I use timestamps, as you say, and I round off and use
> 0.33366700?

Do you know how the '<' and '>' operators work?


  Nicolas George
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