CHANNEL_NUMBER 703 modules/videoio/src/cap_libv4l.cpp capture->inp.index = CHANNEL_NUMBER; CHANNEL_NUMBER 920 modules/videoio/src/cap_libv4l.cpp selectedChannel.channel=CHANNEL_NUMBER; CHANNEL_NUMBER 851 modules/videoio/src/cap_v4l.cpp capture->inp.index = CHANNEL_NUMBER; CHANNEL_NUMBER 1039 modules/videoio/src/cap_v4l.cpp selectedChannel.channel=CHANNEL_NUMBER;