[FFmpeg-trac] #4012(undetermined:new): Transcoding Slo-Mo MOVs from iPhone results in awful MP4

FFmpeg trac at avcodec.org
Wed Oct 8 02:56:17 CEST 2014

#4012: Transcoding Slo-Mo MOVs from iPhone results in awful MP4
             Reporter:  hendry        |                     Type:  defect
               Status:  new           |                 Priority:  normal
            Component:  undetermined  |                  Version:  2.4.2
             Keywords:  ios           |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
 Summary of the bug: I simply want to share on the Web, videos from my
 iPhone taken with the Slo-Mo feature

 How to reproduce:
 Transcode my MOVs to MP4s like a usually do with
 https://github.com/kaihendry/recordmydesktop2.0/ and the resulting MP4's
 audio is mal-aligned and the video playback is unwatchable (full of
 pauses). I've tested playback on Chrome 39.0.2171.7, Firefox 32 and IOS
 safari. All basically unusable result from ffmpeg.

 % ffmpeg -y -i "$input" -movflags +faststart -pix_fmt yuv420p -c:v libx264
 -vprofile baseline -acodec aac -strict experimental "$out"
 version 2.4.2
 built on Archlinux

 Warning about high frame rate:

 Original "Slo-Mo": http://s.natalian.org/2014-10-07/IMG_4596.MOV
 Transcoded result: http://s.natalian.org/2014-10-05/IMG_4596.mp4

Ticket URL: <https://trac.ffmpeg.org/ticket/4012>
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