Results of some troubleshooting...
I downgraded my software for the Intensity Pro to 1.8.4 and captured one minute of 1080i Motion JPEG to a defragmented system drive without dropping a frame. I have yet to do longer tests and have not tested yet in 720p but I will update this post with those results as soon as they come in.
720p results: Still dropping frames... Even on 1.8.4. This time it's 5 seconds before it quits.
Revised results: Finally, installing a separate capture drive via SATA solved this problem. I went 1:35 without dropouts. The 20 second one was to the same drive but interfaced through USB 2.0, making it slower. This is on software version 2.0.
Still, with a FAT32 formatted drive it can't go above 4GB so there's still a time limit.
720p results: Still dropping frames... Even on 1.8.4. This time it's 5 seconds before it quits.
Revised results: Finally, installing a separate capture drive via SATA solved this problem. I went 1:35 without dropouts. The 20 second one was to the same drive but interfaced through USB 2.0, making it slower. This is on software version 2.0.
Still, with a FAT32 formatted drive it can't go above 4GB so there's still a time limit.
posted by Jack Zhang at 6/29/2008 04:27:00 PM
2 Comments:
Hi Jack,
I'm the Product Manager for Video Capture products in Blackmagic Design. It's great that you're blogging your progress as it's good feedback for us back in HQ about what users are doing :).
However. your results does not sound right at all. The Blackmagic MJPEG codec requires only about 12 - 14 Mb/sec of throughput so a single SATA drive should be ample.
Have you tried the disk speed test utility that is installed with the Intensity drivers? What kind of speeds are you getting off the drives you're capturing to?
Thanks for viewing my blog!
Well, I resolved this issue as described in the most recent edit of this post and have also converted to 4096byte NTFS so the file size limit is no longer an issue.
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