[Cin] ffmpeg 7.0 api changes

[Andrea paz]

Compilation does not work. I attach the cin5.log

In configure.ac I changed the entry:
ffmpeg-6.1 to ffmpeg-7.0
However, I left two entries unchanged
ffmpeg6
because in my system I still don't have ffmpeg7.
Should I also change these two entries to ffmpeg7?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: cin5.tar.gz
Type: application/gzip
Size: 235884 bytes
Desc: not available
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20240407/3fac9ecc/attachment-0001.bin>