[Cin] libav version in About prefs [patch]

[Andrew Randrianasulu]

mmm maybe even like second patch? (adds printing libav version to our
startup banner)

Another patch tries to add cinelerra-cv team copyright, I hope I did layout
and dates themselves correctly!

вс, 27 авг. 2023 г., 15:28 Andrew Randrianasulu <randrianasulu at gmail.com>:

> So, few more lines showing our libav version (there is no differentiation
> between patched and unpatched ffmpeg yet, but at least you can see if build
> was done against specific API version)
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20230827/248a287c/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0003-Add-Cinelerra-Cv-team-copyright.patch
Type: text/x-diff
Size: 2904 bytes
Desc: not available
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20230827/248a287c/attachment.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0002-Rework-libav-version-string-print-a-bit.patch
Type: text/x-diff
Size: 2845 bytes
Desc: not available
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20230827/248a287c/attachment-0001.bin>