ffmpeg -framerate 25 -start_number 1 -i IMG_%4d.jpg
-codec:v mpeg4 output.mp4
Please understand that you are expected to always
post your command line including the complete,
uncut console output on this mailing list.
The above command line does exactly what it's supposed to do.
Let's assume I have 250 input pictures. With framerate 25, the video
length is 10 seconds.
My questions (with other words) are:
How must I modify the command line, if I want a video with framerate 25,
but 20 seconds long? That means each picture must be used twice:
1,1,2,2,3,3,4,4, ...
How must I modify the command line, if I want a video with framerate 25,
but only 5 seconds long? That means all pictures with even numbers must
be skipped: 1,3,5,7,9, ...
Thanks,
Michael
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