October 8, 2002

Dumping BigYUV to Disk

Turns out the cameras in 155 Sitterson are just fine. I ran around the entire building today looking for a composite video cable to try and test the cameras directly with the projectors, but when I got back to 156 Sitterson, David Ott was there and explained that the little light on the front needs to be green and not red. Red is some sort of standby mode. Once we found the camera remote I was able to activate all of the cameras and the signal came over the S-Video just fine.

I then modified video/video-meteor.cc (the device used for Brooktree cards) and codec/device.[h|cc] so that I could append frames onto a file. When using YUV 4:2:2 (e.g. JPEG) I dump in BigYUV format--the format expected by the VQM Software. I tested vic with JPEG large, highest-quality, maximum bandwidth/fps and was able to get up to 27fps on vidcap4-cs. So dumping to disk is not putting a significant strain on the process; 27fps is approximately where vic got before I made these changes. vidcap4-cs is a Pentium III 1GHz with 256MB PC-133 SDRAM and 9GB hard disk. I'm not sure what the specifications of the hard disk are, but at 27fps the dump file quickly approached 100MB in just a few seconds.

Posted by josuah at October 8, 2002 8:09 PM UTC+00:00

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