70 min capture limit

[marcanol]

How can I capture more than 70 min with my DC10+ card, I already try with,VirtualDub and Avi_IO. All those programs permits only 70 min of capture in one long .avi file, I don't know if there is any setting on the programs that can help me to change the time capture.

[vhelp]

The only thing I can think of is that you UNconchesly press the
STOP button while you were asleep (at 70min into the capture)
Maybe a coinsidence!

Seriously though, in AVI_IO, there is NO time limit, but maybe
in Studio! I've never had such problems with AVI_IO captures
beyond the 70min, but then again, I for the most part, done
only 1 hour capures, though I did some 2 hour captures on
some movies.

I don't know what else to say, but keep looking.

[sommersby]

are you sure your not hitting the 4 gig file limit?

[Ronin2]

I believe this will be your problem. It is on the Virtualdub site in the documentation section.

"Why does my video capture stop at 1 hour, 11 minutes, but I still get audio?"

This is a bug in many video capture drivers. The exact limit is actually 232 microseconds, or 1 hour, 11 minutes, 34 seconds. Many TV tuner devices are susceptable to this bug, as are the miro/Pinnacle DCxx devices; you may be able to fix the problem simply by upgrading to the latest capture drivers. There are two incarnations of this problem. In the non-fatal version, video frames are still sent to the application, but the timestamp on the video stream starts over from zero. VirtualDub will correct for this problem automatically, allowing you to capture beyond 71 minutes. The other possibility is that the driver stops sending data altogether. VirtualDub will notify you if this occurs, but will not be able to capture past 71 minutes in this case.

Vanilla capture devices based on the Conexant/Brooktree BT848/878 reference drivers are usually either immune to the problem or have the non-fatal form of it. I'm told that the bug in Pinnacle's DC30(+) drivers still exists but is nonfatal as of the 1.41a drivers. As of this writing, the bug in the DC10/10+/20/20+ drivers is fatal and cannot be worked around.

There are apparently a few drivers that are even susceptable to half this limit (35 min.) due to using signed 32-bit arithmetic. VirtualDub does not yet detect or attempt to bypass the 35 minute limit that results.

Regards,
Ronin2