[FFmpeg-user] video to image sequence conversion problem

[Carl Eugen Hoyos]

BhelPuri <samosa_chaat <at> yahoo.com> writes:

> My video (29.97 fps) is that of a precise oscillatory motion 
> of time period 40 seconds. If the downsampling to 5 fps is 
> done correctly then the peaks (in motion) should be 200 
> (=5*40) downsampled frames apart.

Aren't you assuming 30fps here?

> But I find that it is off by 1 or 2 frames in the downsampled 
> sequence (a difference of about 6-12 original frames).

Isn't this exactly the difference between 30000/1001 and 30fps?

Carl Eugen