updated for better a/v support
removed -qscale as it conflicts directly with bitrate. bitrate is stricter in that its a limited resource, therefore it should be used instead of qscale.
removed all -vsync and -async as they just dont work with libx264
made sure that -map 1:0,0:0 is used to force audio to sync with video
NOTE: audio.sh should probably not be used, for whatever reason it messes with the ability of audio to sync properly