Revert "video: use ffmpeg on OSX"

- libav is still selected when building the daemon
- patch 0005-add-avfgrab-device.patch does not compile
- video does not work with the avfcapture device

This reverts commit 762ce5d190bdb53a6ea4e48ae724e73640998880.

Change-Id: Iebe59520877bbcd8fb9e8581341ff77be6d326b0
4 files changed