ffmpeg -f dshow -i video="Osprey-450e Video Device 1A":audio="Osprey-450e Audio Device 1A" -f mpegts -b:v 5120k -r 30 -c:v mpeg2video -c:a ac3 -b:a 256k udp://239.192.42.61:1234

[dshow @ 02c7f640] Could not run filter video=Osprey-450e Video Device 1A:Audio?Osprey-450e Audio Device 1A: Input/output error