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