Utilize padding for in place editing

[ghost]

The TagEditor project supports padding, which allows in place editing of a
file:

$ time tageditor -s cover=y.jpg --max-padding 100000 -f z.mp4
real    0m1.988s

However MP4Box rewrites the entire file; this can be slow with large files:

$ time mp4box -itags cover=y.jpg z.mp4
real    0m12.911s

Does MP4Box support in place editing of files?

[jeanlf]

Not really planned for the moment. We would need to know how much space to reserve up-front when creating the tagging box, and it will not work when editing tags on files without any reserved space in that box.

[jeanlf]

Now on git, adding a howto on the topic asap

[jeanlf]

Howto: https://github.com/gpac/gpac/wiki/mp4box-inplace