[FFmpeg-trac] #1485(avformat:new): Support for Quicktime CLEF/TAPT atoms

FFmpeg trac at avcodec.org
Mon Jun 25 15:52:36 CEST 2012

#1485: Support for Quicktime CLEF/TAPT atoms
             Reporter:  brams     |                     Type:  enhancement
               Status:  new       |                 Priority:  normal
            Component:  avformat  |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
 FFmpeg does not currently support the Quicktime CLEF (Track Clean Aperture
 Dimensions) and TAPT (Track Aperture Mode Dimensions) atoms.  (See
 These atoms are necessary for detecting the correct dimensions for some
 videos, since they take precedence in Quicktime over the normal TKHD
 (track header) width/height and over the track PASP (pixel aspect ratio).

 The attached patch adds support for these atoms.  I can provide a sample
 video if desired.

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1485>
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