[FFmpeg-user] Trying to add metadata media_type to mp4

[Kieran O'Leary]

Hi,

It looks like media_type does not take a string like "media_type" as its value, but an Integer, according to the source code: https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/movenc.c#L3327

So the default seems to be 0 if you provide some text, which produces a value of 'Movie', but if you use -metadata media_type=1 , then the value becomes Music. From trial and error, it looks like
-metadata media_type=10
will produce a value of TV Show.

It looks like mediainfo has a good list of what the values produce: https://github.com/MediaArea/MediaInfoLib/blob/080212c30baea3f85602eaf61aa8feaedb983971/Source/MediaInfo/Multiple/File_Mpeg4_Elements.cpp#L2682

It looks like what ffmpeg calls media_type is mapped to ContentType in Mediainfo. i can't find any information about either element inthe QuickTime specification, though. 

Best,

Kieran O'Leary
IFI Irish Film Archive.
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