[FFmpeg-user] ffmpeg ignores duration and skips concat images
Carl Eugen Hoyos
cehoyos at ag.or.at
Mon Jun 16 00:32:48 CEST 2014
Moritz Barsnick <barsnick <at> gmx.net> writes:
> On Sun, Jun 15, 2014 at 20:37:47 +0000, Carl Eugen Hoyos wrote:
> > Spencer Graves <spencer.graves <at> prodsyse.com> writes:
> > > ffmpeg -y -r 1 -i restrictSecrecy3.mp2^
> > > -f concat -i framesFiles.txt^
> > Did you intend to set an input framerate of 1
> > for the audio file or for the images?
> Was this the implicit explanation for the
> described behavior, or just a remark?
Spencer provided a command line that sets the
audio rate for mp3 (which does not work), sets
no video frame rate for image2 (meaning that
the default rate of 25fps is used) and uses
the fps filter to skip most frames.
Setting the video input frame rate (and
removing the fps filter which probably
eats the first frame or something similar)
should solve his problems.
If it is really completely unexpected that
the following does not work, I would like
to read about it (although I don't think we
can change it):
$ ffmpeg -option_for_second_input_file
-i first_file -i second_file
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