Configurable x264 preset and crf
Theora/Vorbis quality configuration added
Bugfix in vp8 ffmpeg codec name
Move verify_progress outside of the method scope so it can be also used with other tests.
Add a test case for vp8 video codec.
Merge pull request #1 from Kami/improve_codecs_add_vp8_codec_test

Add a test case for vp8 codec.
Build ffmpeg with libvpx.
Add `tune` and `profile` params to x264 encoder
Merge remote-tracking branch 'Kami/improve_codecs_update_ffmpeg_installation' into improve_codecs
Merge remote-tracking branch 'tahajahangir/improve_codecs'

Conflicts:
	test/test.py