id,summary,reporter,owner,description,type,status,priority,component,version,resolution,keywords,cc,blockedby,blocking,reproduced,analyzed
1788,setting the output frame rate of image outputs,burek,,"I'm not sure if this is a bug or not, since I was suggested that ffmpeg is not designed to be used in such way, but I can surely ask anyway :)

Summary of the bug:
Trying to extract 1 frame each 5 seconds of the video input to an image output, by setting the output frame rate to 1/5 produces the expected result but with the first 3 output frames failed (not correctly timed).

How to reproduce:
{{{
ffmpeg -f lavfi -i testsrc -t 60 -f image2 -r 1/5 img%02d.bmp
ffmpeg -f lavfi -i testsrc -t 60 -f image2 -r 1/5 img%02d.jpg
ffmpeg -f lavfi -i testsrc -t 60 -f image2 -r 1/5 img%02d.png
}}}

All of the commands above will produce first 3 output image frames wrong, but all the other frames will be correctly created, meaning that img01.*, img02.* and img03.* will be wrong and img04.*, img05.*, ... will be correct. The time difference between frames is correct only the starting time point is wrong, I guess due to those first 3 frames not being created properly.",defect,closed,normal,FFmpeg,git-master,duplicate,,,,,1,1