[GTALUG] ffmpeg question

[Zbigniew Koziol]

Hello,

For some here the answer will probably be know right away. That is why I 
am writing, after long googling.

I would like to create a sort of video presentation from images. 
However, I would like that every slide (image) is displayed for a 
different time duration. This is just the first step; next i would like 
to combine voice with that, but it is probably another problem, for later.

Hence, I have a sequence of images y-%2d.png

The following works for me:

ffmpeg -framerate 1/10 -i y-%2d.png -c:v mpeg4 -vf 
"fps=2,format=yuv420p" out.mp4

And the following works, too:

ffmpeg -r 1/2 -start_number 7 -i y-%2d.png -c:v mpeg4 -vf 
"fps=2,format=yuv420p" out.mp4

However, how to control the time of displaying individual images? Is 
that possible at all?

I thought that something like this may work:

ffmpeg -r 1/5 -i y-01.png -r 1 -i y-02.png -c:v mpeg4 -vf 
"fps=2,format=yuv420p" out.mp4

It does not. The first image is displayed, only.

Kind regards from Poland,
zb.

-- 
Zbigniew Kozioł
http://nanophysics.pl
mobile: 500 685 477
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