[Cin] ffmpeg 7.0 soon to be released

[Andrea paz]

Trying to repeat Igor's test, with CinGG compiled with ffmpeg7, I find
the render audio clean and without scratches. I remember that I use
Arch, which has all updated drivers and libraries. On the terminal I
read:

file:/home/paz/igor_test.webm
  err: Invalid data found when processing input
FFStream::decode: failed
FFMPEG::open_decoder: some stream times estimated: /home/paz/igor_test.webm
FFMPEG::open_decoder: some stream times estimated: /home/paz/igor_test.webm