[Cin] ffmpeg 7.0 api changes

[Andrea paz]

Sometimes I think it is my old projects or even not my own that cause
some problems. For example to test ChromaKeyHSV I created my own
project, but I also used two projects of IgorV. I could never see
precise cause and effect though, so I'm not sure.

Regarding AC3, there is a commit in Adam's repository about decoding
AC3, but I don't think it is related. Anyway, the link is this one:
https://github.com/heroineworshiper/hvirtual/commit/3124ad744154eae8e48bdeff00d81d11613dc9a4