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.
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