Running DVgrab with my Canon XH-A1S in HDV mode I get the following.
A m2t file is generated and VLCplayer will open it but there is nothing in it. I can pipe dvgrab into ffmpeg and get video with a couple frames every second. but I think thats jus the result of dvgrab starting and stopping. FFmpeg also throws a couple errors as a result of the data (or lack thereof) coming from dvgrab.
Found AV/C device with GUID 0x0000850001d00f31
libiec61883 error: Failed to get channels available.
Waiting for HDV...
"dvgrab-003.m2t": 0.80 MiB 4 frames timecode 00:30:55.13 date 2011.05.31 14:21:11