I am using the following line to preview my webcam:
ffmpeg -s 1280x720 -framerate 30 -pix_fmt yuv420p -rtbufsize 100MB -f dshow -i video="Logitech Cam#1" -c:v copy -an -f sdl "WebCAM Preview"
this line works fine with cam #1, however when try it with cam #2, I get the error:
[dshow @...