Пробую с регистратора по rtsp забрать картинку и разместить мозайкой в vlc(просто для просмотра). Методом проб и ошибок удалось написать такой конфиг:
new channel1 broadcast enabled
setup channel1 input rtsp://user:pass@10.20.0.11/Streaming/Channels/101
setup channel1 output #duplicate{dst=mosaic-bridge{id=1},select=video,dst=bridge-out{id=1}}
new channel2 broadcast enabled
setup channel2 input rtsp://user:pass@10.20.0.11/Streaming/Channels/201
setup channel2 output #duplicate{dst=mosaic-bridge{id=2},select=video,dst=bridge-out{id=2}}
new channel3 broadcast enabled
setup channel3 input rtsp://user:pass@10.20.0.11/Streaming/Channels/301
setup channel3 output #duplicate{dst=mosaic-bridge{id=3},select=video,dst=bridge-out{id=3}}
new channel4 broadcast enabled
setup channel4 input rtsp://user:pass@10.20.0.11/Streaming/Channels/401
setup channel4 output #duplicate{dst=mosaic-bridge{id=4},select=video,dst=bridge-out{id=4}}
new mosaic broadcast enabled
setup mosaic input "/tmp/mosaic.jpg"
setup mosaic output #bridge-in{offset=100}:display
setup mosaic option sub-filter=mosaic
setup mosaic option mosaic-position=1
setup mosaic option mosaic-rows=2
setup mosaic option mosaic-cols=2
setup mosaic option mosaic-order=1,2,3,4
setup mosaic option mosaic-delay=0
setup mosaic option mosaic-keep-picture
control mosaic play
control channel1 play
control channel2 play
control channel3 play
control channel4 play
