Thanks, Lennart and John for suggestions. I suspect that it was the right idea that ffmpeg can not do this. I would prefer rather to have a command from terminal where everything is there, not an external program (though I did them already installed and will try one day). However, just after posting to this list (that is an advantage of writing here; that stimulates own thinking) an idea, a simple one, come: Well... instead of changing the time of displaying an individual image, I could instead create a number of copies of every image, according to the need (the time of display), enumerate them accordingly, and.. thats it! In other world, instead of controlling the time of display, I would rather adjust the number of copies of identical images. For a presentation with a few tens of images this is a prefectly convenient solution around the problem. zb. On 11/19/2014 07:25 PM, John Moniz wrote:
On 11/19/2014 11:37 AM, Zbigniew Koziol wrote:
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.
I have used PhotoFilmStrip and also Imagination. One of them does the individual time duration, can't remember which.
John.
--- GTALUG Talk Mailing List - talk@gtalug.org http://gtalug.org/mailman/listinfo/talk
-- Zbigniew KozioĊ http://nanophysics.pl mobile: 500 685 477 stationary at home: 17 229 8940