Ffmpeg zvbi addition

[arnebjarne]

Motivation: Explain here what the reason for the pull request is.
Linked issues: Optionally, add links to existing issues or other PR's

Checklist

• Build rule all-supported completed successfully
• Package upgrade completed successfully
• New installation of package completed successfully

[th0ma7]

Thnx for your contribution, this is greatly appreciated. Overall proposed changes looks good. I see a lot of patches added and some of them do not seems to be a fit for the environment, please adjust as needed based on review. Also all these patches will add to maintenance burden on new software releases but is probably manageable.

[th0ma7]

I notice that failures seems to be due to connection time out and not actual build failures.

Also note that in order to release a new ffmpeg I normally do a full round of updates as I also have to tie-in other dependencies (tvheadend, chromaprint and comskip). Before releasing a new package I have an issue to fix with tvheadend first so this may take a few cycles to get published (which does mean you can't build yourself an updated version).

[th0ma7]

Fixing PLIST and moving patch under arm looks like all remaining to do.

[th0ma7]

Looks great, good job.

[th0ma7]

I'll look into publishing the update within the next few days when I have more cycles.