[FFmpeg-devel] [PATCH] mov: support for Quicktime CLEF/TAPT atoms

Bram Senders bram.senders at longtailvideo.com
Thu Jun 28 10:35:23 CEST 2012


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

The attached patch adds support for these atoms. Sample videos can be
found at https://ffmpeg.org/trac/ffmpeg/ticket/1485.

Cheery regards,
Bram Senders
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