[libav-bugs] [Bug 927] Snippet for combining image sequences from pipe not working

bugzilla at libav.org bugzilla at libav.org
Sat Mar 5 18:38:51 CET 2016


https://bugzilla.libav.org/show_bug.cgi?id=927

--- Comment #4 from rick1987 at gmail.com ---

Sorry but I don't understand. Why do you say that I only have one input?
I mean: why is my case different from the snippet assumptions?

Anyway. Without the 'map 1' it seems to work but it only uses the images in the
first directory (dir_a).

This is not an issue for me because in the end this is not the problem I am
trying to solve.
I take the opportunity to ask you some more help about my specific problem if
you don't bother.

I have a program writing images to a named pipe called "test.jpg", say I have:

$mkfifo test.jpg

then I use, in another shell,

$avconv -f image2pipe -c:v mjpeg -i test.jpg -r 25 -map 0 out.mov

at this point avconv seems to be waiting. In another shell I run

$cat mini.jpg > test.jpg

and avconv does save this image to the out.mov, but it exists immediately
without letting me pass additional images. I also tried adding "-loop 1"
because I read this somewhere but it did not help.

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