[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
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             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         |
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 FFmpeg does not currently support the Quicktime CLEF (Track Clean Aperture
 Dimensions) and TAPT (Track Aperture Mode Dimensions) atoms.  (See
 https://developer.apple.com/library/mac/#documentation/QuickTime/QTFF/QTFFChap2/qtff2.html)
 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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