[FFmpeg-trac] #5078(undetermined:new): FFMPEG "loop=0" value results in warnings and extremely long runtime

FFmpeg trac at avcodec.org
Wed Dec 9 23:23:46 CET 2015


#5078: FFMPEG "loop=0" value results in warnings and extremely long runtime
-------------------------------------+-------------------------------------
             Reporter:  eric         |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by eric):

 Replying to [comment:5 cehoyos]:
 > Please provide input files and command lines including complete, uncut
 console output with default verbosity for current FFmpeg.

 Due to the file size limits, I wasn't able to provide the original
 sources, but I was able to reproduce the issue using a 1 second audio.mp3
 and a 3 second video.mp4.  They've been attached to the ticket.  Since the
 video is 3 seconds, the resulting output (which still takes multiple
 minutes to generate) has the video from video.mp4 and the audio from
 audio.mp3 looped 3 times.

 I included the log file (ffmpeg-20151209-125328.log​) generated running
 this command-line but I did need to trim 90K lines from the middle in
 order to meet the file upload size restriction.
 {{{
 % ffmpeg -report -i video.mp4 -f lavfi -i
 "amovie=filename=audio.mp3:loop=0" -map 0:v -map 1:a -shortest -c:v copy
 output.mp4
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/5078#comment:6>
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