[FFmpeg-user] ffmpeg ignores duration and skips concat images

Spencer Graves spencer.graves at prodsyse.com
Mon Jun 16 03:17:03 CEST 2014

Thanks to Carl Eugen:

       The problem was fixed by setting "fps=25".

       However, I have another problem:  How can I get the video to stop 
at the end?  It restarts each time it reaches the end.

       Thanks again.
       Spencer Graves

p.s.  Without fps, I get "Unable to find a suitable output format for 
'yuv420p' yuv420p: Invalid argument".

p.p.s.  I also experimented with Carl's question about the input 
framerate.  I was unable to detect any difference between the result 
with "-r 1", "-r 25", "-r 0.04", and without any "-r" specification.  
The documentation from "ffmpeg -h" lists "-r" under "video options", 
saying it is used to "set frame rate (Hz value, fraction or 
abbreviation)".  It appears to have no impact on audio.

On 6/15/2014 1:37 PM, 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?
>> -vf fps=1 -pix_fmt yuv420p restrictSecrecy.mp4
> And please remove the fps filter if you want
> input frame rate == output frame rate, it
> cannot help here (but may hurt).
> Carl Eugen
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