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