[FFmpeg-devel] avformat/mov: improve qt metadata reading and writing

Michael Niedermayer michael at niedermayer.cc
Thu Jun 23 11:44:07 CEST 2016

On Wed, Jun 22, 2016 at 07:12:48PM +0200, David Murmann wrote:
> Hi all,
> this has been brought up before, the MOV muxer/demuxer currently does not support all
> possible datatypes that are allowed in keys/mdta style metadata. This is specified here:
> https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/Metadata/Metadata.html#//apple_ref/doc/uid/TP40000939-CH1-SW35
> At the moment only data types 1 (UTF-8) and 23 (Float32) work. I have a patch that adds
> support for 21 and 22, as I have found those in actual files produced by ARRI cameras.
> I have a second patch that adds a flag to the muxer to output keys/mdta style metadata,
> to be able to keep the metadata while transcoding camera files.

> This patch tries to do something similar, but is mine is shorter (though not as complete)
> so hopefully easy to review:
> https://lists.ffmpeg.org/pipermail/ffmpeg-devel/2015-September/178347.html
> (I actually found this only after writing my patches.)

that was maybe forgotten due to the rfc in the subject


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Opposition brings concord. Out of discord comes the fairest harmony.
-- Heraclitus
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