metadata-extractor
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drewnoakes
How can read video metadata User Comment
The User Comment of the metadata tag in the picture is read well, but the mp4 video file is not.
Could your provide an example file?
The first step would be to find out which box this metadata comes from. Then we can parse and store the information when its ID comes up.
The ISO Base Media format spec is usually a good starting place
These are the boxes that we pass, but do not parse:
mdat
tkhd
edts
dinf
stsc
stsz
stco
tkhd
edts
dinf
stss
sdtp
stsc
stsz
stco
udta
It is possible that some of these are containers and may contain other boxes.
If the comment item you are referring to is the one from the 'meta' box, then this has already been implemented for QuickTime. It will just need to be moved over (perhaps with a few modifications).
It's in a strange meta structure in the udat box:
udta meta hdlr ilst (0xA9)cmt data 'comments...'
done.
