[FFmpeg-trac] #2958(undetermined:new): Transcoding some iPhone camera roll videos outputs excessive frame-rate

[FFmpeg]

#2958: Transcoding some iPhone camera roll videos outputs excessive frame-rate
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             Reporter:  nealzebub    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 '''OS:''' CentOS 6.3 64-bit
  '''Build:''' N-55797-g535d9a9
  '''Obtained from:'''  http://ffmpeg.gusari.org/static/64bit/

 Summary of the bug:
 I am attempting to transcode several MOVs that are directly from an
 iPhone4's camera roll folder.  I do not specify frame-rate, since the
 videos are variable frame-rate (24,30 fps).  For a few of the MOVs, the
 transcoded h264 output has a declared fps of 600, causing the h264 level
 to be very high, which means that some players reject playback.  I noticed
 for these MOV files that FFmpeg, in the input stats, reports "tbr 600".
 I checked the video timestamps of the particular files using FFprobe.  All
 PTS differences don't amount to anything more than 31 fps.

 How to reproduce:
 Use the following source
 https://www.dropbox.com/s/xji1akd6tuuravd/from_iphone4.MOV

 with the following command:
 {{{
 % ffmpeg -report -i from_iphone4.MOV -c:v libx264 -crf 23 -an
 shouldbe30fps.mp4

 }}}

 I will attached the report, as the console output is annoyingly long.

 Please note that this entry is very similar to issue #2451.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2958>
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