Hallo > > If you have a Marvel please tell us the hole command you use. > > The mjpeg > > tools version, and the Linux you use. > > I have Marvel and I tried these command lines with lavrec : > "lavrec -in -q80 -d1 -s test.avi" > "lavrec -in -b 128 -q80 -d1 -s test.avi" > "lavrec -in -q50 -d2 -s test.avi" > "lavrec -in -b 128 -q50 -d2 -s test.avi" > I tried differnet -b and -n options, in some cases -b 128 seems to work > better > but it works best with -b 256 The -b option changes the maximal allowed buffer for a frame. If you ste that value to low recording wont work reliabel, or the driver reduces the quality so on frame still fits into the buffer. It depends on the driver how that problem is handeld.
> 0 frame corruptions with > "lavrec -in -s test.avi" which would equeal to "-d4 -q50" > although I did not run that test for more that 15 minutes, as I did not > intent to use it. I think no one is using -d 4 any more. > alot of frame insertions with -q95 > I would expect to see dropped frames if my video card could not handle it? > I cant blame it on drivers as those do not crash the system nor report any > problems. Please search the marve maling list. I think I remember some talk where they told that the marvel cannot deliver very high quality factors without time outs and broken jpeg frames. Depending on the size you do not need to set a higher quality than -d 2 -q 80, -d 1 -q 40. You find more info in the mjpeg howto section "Recording videos", the subsection: Other recording hints will also be very interresting. > Using Debian, Woody, Stable > clean kernel 2.4.20 w/ ACPI patch, using mgavideo 0.1.1b and tried mgavideo > 0.1.0 > no framebuffer support, system seems to be unstable with it > tried SB16 PCI, SbLive5.1, and onboard intel81x sound cards with: > Alsa, OSS/Free and OSS drivers, also tried emu10k1 with SBlive from sf.net > currently using commercial OSS drivers with onboard i81x > same results with every sound card I tried. Ok that lookes fine. > > How much load has your system when you record ? > with -d1 -q80 , top shows 65%, ranging -/+ 6% at -d2 -q50 its around 30% Thats much to high for anything faster that 500MHz. On a Athlon 500 It should not be higher than 10% even when you record a -d 1 70%. Could it be that your disk has DMA not enabled ? auf hoffentlich bald, Berni the Chaos of Woodquarter Email: [EMAIL PROTECTED] [EMAIL PROTECTED] www: http://www.lysator.liu.se/~gz/bernhard ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
