Encoding/transkoding/transmuxing
Sum up 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>-mono.dv
Sum up 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>-mono.dv