(Next time you post, please fix the "privacy alert" in the subject line;
that doesn't belong.)
On 12/29/2020 5:57 AM, MERT Gürtürk wrote:
I have a 30 fps video file.I will use this process for geotagging.
Actually, you have a 29.97fps (or 30000/1001) file (aka "drop-frame" rate).
I want to set this file to produce 1 image per second (starting from the
first image). My video duration is 8.51 minutes in total.
Assuming the duration listed is correct (00:08:51.54 = 531.45 sec), in
source frames that would be about 15930 source frames with that half-second
included. That half second might get you an extra output frame.
Referring to some official doc (which really wasn't hard to find)
https://trac.ffmpeg.org/wiki/Create%20a%20thumbnail%20image%20every%20X%20seconds%20of%20the%20video
use the fps video filter
ffmpeg -i NTSC_Test.mov -vf fps=1 x\%04d.jpg
Using a frame-count marked 2-second (00:00:02.0) file I get frames 0.14 and
1.14 (in the middle of each second). If you need to get the first frame of
each second, you may need to experiment with the 'select' filter.
Examples from using -r (for anyone searching the archive)
ffmpeg -i NTSC_Test.mov -r 1 x\%04d.jpg
gives frames 000, 0.01, 0.26, and 1.26
ffmpeg -i NTSC_Test.mov -ss 00:00:00.1 -r 1 x\%04d.jpg
gives frames 0.03, 0.04, 0.29, and 1.29
Later,
z!
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