On Sun, 2003-11-30 at 23:17, suriya mohan wrote: > Hi steven, > If at all any frame dropping occurs, then it is not due to the > driver we use. If you try frame capturing in desktop linux then frame > dropping will occur rather should occur. Because the processor is not > dedicated. If u try this in any embedded device like set-top box or > PVR then you will probably have good result. So I think there will not > be any problem with the patches we apply to the kernel source. > > Any comments from others in the group regarding this ? > Is there any indication why the capture is dropping frames? I'm a rank newbie at this, having just tried DV capture for the first time yesterday. I had problems with 'dvgrab' keeping up until I discovered that I had neglected to compile in specific support for the motherboard chipset. Once that was done, I was able to capture without dropping frames until my hard drive was full. But that's a different problem. In any case, the warnings produced by 'dvgrab' clearly indicated that writing to the hard drive was not keeping up. Also compiling the correct chipset drivers allow disk I/O to use DMA and this reduced CPU load from about 50% to about 5% as reported by 'top.' For reference this is a Sony Vaio laptop with 750 MHz P-III, 256MB RAM and 20 GB hard drive. The kernel is 2.4.22 custom compiled but no patches applied save a one line fix to scanner.c (USB scanner bug.) -- Hank Barta Beautiful Sunny Winfield Illinois, USA
