Arch Linux

It's that time of the year again, a new ffmpeg is out. While we're at it, let's do x264 as well. Packages go to staging as usual.

You will get errors, a few pointers:

- Adding `-fpermissive` to your build flags should get you through most of the errors
- `av_register_all()` and `avcodec_register_all()` have been removed and can be safely patched out
- AVPicture has been replaced with AVFrame, you can find a example patch over at MythTV [0]

If all else fails, there is a ffmpeg4.4 package at your disposal while upstream gets up to speed.

[0] https://code.mythtv.org/trac/attachment/ticket/13186/002_avpicture.patch