Encoding/transkoding/transmuxing

Sum up audio-channels of a DV file: 

 ffmpeg -i <dvfile>  -ac 1   intermadiate.wav
 ffmpeg -i <dvfile>  -i intermediate.wav   -map 0:0 -map 1:0 -ac 2 -f dv <dvfile>-dual-mono.dv

Streaming still image

Takes a still image like a jpg or png and you can use it as a source in dvswitch 

ffmpeg -loop_input -f image2 -i <PATH TO IMAGE> -target pal-dv - | dvsource-file /dev/stdin

Feedback til sekundær-kameramonitor

dvsink-command -- vlc -