+ // Video mixing.
+ optional MIDIButtonProto switch_video_channel = 38;
+ optional MIDIButtonProto apply_transition = 39;
+
+ // Main UI. Really global, but see the comment on lo-cut etc. above.
+ optional MIDIButtonProto prev_audio_view = 40;
+ optional MIDIButtonProto next_audio_view = 41;
+ optional MIDIButtonProto begin_new_video_segment = 42;
+ optional MIDIButtonProto exit = 43;
+