[FFmpeg-trac] #137(FFmpeg:new): Encoding image only movie failure

[FFmpeg]

#137: Encoding image only movie failure
-------------------------+-----------------------------------
  Reporter:  jogga       |      Owner:  michael
      Type:  defect      |     Status:  new
  Priority:  important   |  Component:  FFmpeg
   Version:  git-master  |   Keywords:  encoding, png, ffmpeg
Blocked By:              |   Blocking:
Reproduced:  0           |   Analyzed:  0
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 I'm trying to overlay a QuickTime movie that consists of PNG images on top
 of another movie. I have noticed that FFMPEG doesn't seem to handle such
 an image-only movie correctly.

 To illustrate the problem I have made a simple example movie that has one
 image sample for each second with a timecode written to it. When I try to
 convert this movie and change the framerate FFMPEG seems misinterpret
 samples randomly.

 Download the sample movie from
 http://dl.dropbox.com/u/659266/timecodes.mov and try with the following
 simple command line:

 ffmpeg -y -i timecodes.mov -r 25 timecodes_copy.mov

 You will see that FFMPEG will shorten the first sample to 1 frame instead
 of 25? The sample that should appear on frame 26 will instead appear on
 frame 2?

 Looking forward to some help with this problem!

 Best regards / Jorgen

 ffmpeg version git-N-29387-gff558d7, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Apr 26 2011 13:27:41 with clang 2.0 (tags/Apple/clang-139)
   configuration: --arch=x86_64 --cc=clang --disable-debug --disable-shared
 --enable-static --enable-libmp3lame --enable-libx264 --enable-libxvid
 --enable-libvpx --enable-libtheora --enable-libvorbis --disable-ffplay
 --disable-ffserver --enable-gpl --enable-swscale --enable-avfilter
 --enable-filter=movie
   libavutil    51.  0. 0 / 51.  0. 0
   libavcodec   53.  1. 0 / 53.  1. 0
   libavformat  53.  0. 3 / 53.  0. 3
   libavdevice  53.  0. 0 / 53.  0. 0
   libavfilter   2.  0. 0 /  2.  0. 0
   libswscale    0. 13. 0 /  0. 13. 0

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/137>
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