OK, I guess this has been covered somewhere already, but my question is short for those in the know (which I'm not one of). I use the following command to capture from either SVHS tapes or from live TV:

ffmpeg -i /dev/videoN -vcodec copy -acodec ac3 -ab 448k ~/capture.mp4

I like ffmpeg better than cat because I can set acodec and ab. But when the capture is commencing I can't view it on my computer.

How can I also view on my computer whatever the ffmpeg is capturing?

Thanks for letting me post one more HD-PVR and vid-cap thread.