My setup: AMD Duron 800 128mb ram Osprey 100 card, voodoo3 3000 tv card I got this speed even in lower configs (as P II and K6 II). There are some other codes in my home page, out of videodog, including a link to a package called TCap at http://toonarchive.com/tcap/, which code is very straight and clear. Regards ----- Original Message ----- From: "André Luiz Ribeiro Moutinho" <andre.moutinho@xxxxxxxxxxxxxxxxx> To: <video4linux-list@xxxxxxxxxx> Cc: "Mauricio Micoski" <mauricio.micoski@xxxxxxxxxxxxxxxxx>; "Marcelo Ferreira Vinhas" <marcelo.vinhas@xxxxxxxxxxxxxxxxx> Sent: Tuesday, January 29, 2002 6:39 PM Subject: RES: capture speed improvement > Hi, > > I am no using double buffering. I have used a sample code from videodog > I believe that to use double buffering I should set the modules.conf > parameter > add options bttv gbuffers=2 fieldnr=2. Am I wrong ? > > Please, do you have any sample code showing how I can use double buffer > properly ? > > You said I should get at least 27,28 fps. What computer configuration did > you get this ? > > Thanks a lot, > > Best regards, > > André Luiz R. Moutinho > Computer Engineer, COMPSIS - Computadores e Sistemas Ind. e Com. Ltda > moutinho@xxxxxxxxxxxxxxxxx, moutinho@xxxxxxxxxx > Voice: +55 12 394-13966 Fax: +55 12 322-0888 > > > > ----- Mensagem original ----- > > De: Gleicon S. Moraes [SMTP:gleicon@xxxxxxxxxx] > > Enviada em: terça-feira, 29 de janeiro de 2002 16:25 > > Para: video4linux-list@xxxxxxxxxx > > Assunto: Re: capture speed improvement > > > > If should get at least 27, 28 fps with this card. > > The read syscall can be slower than a memcpy from a mmap'ed device. > > Something must be wrong with your code, check out if you are using double > > buffering properly. > > Best regards > > > > > > -- > > Gleicon S. Moraes > > gleicon@xxxxxxxxxxxx > > gleicon@xxxxxxxxxx > > http://planeta.terra.com.br/informatica/gleicon > > > > ----- Original Message ----- > > From: "André Luiz Ribeiro Moutinho" <andre.moutinho@xxxxxxxxxxxxxxxxx> > > To: <video4linux-list@xxxxxxxxxx> > > Cc: "Mauricio Micoski" <mauricio.micoski@xxxxxxxxxxxxxxxxx>; "Marcelo > > Ferreira Vinhas" <marcelo.vinhas@xxxxxxxxxxxxxxxxx> > > Sent: Tuesday, January 29, 2002 6:17 PM > > Subject: capture speed improvement > > > > > > > Hi > > > > > > I am developing a capture and video multicast. I have > > > used the VIDIOCMCAPTURE and VIDIOCSYNC ioctls to read > > > 1 frame from the grabber (struct video_mmap.frame = 0) > > > > > > I could accomplish this but the maximum frame rate is 15. > > > I would like to know how I can improve the video frame rate. > > > I need a higher frame rate and the CPU usage is very low. > > > > > > What about using the read syscall ? Is it faster than mmap > > > method ? Is threre a faster method ? Do I have a DMA access > > > time limit ? > > > > > > I am using the PixelView Play TV Pro and running under > > > a Pentium 300Mhz equivalent machine and linux RH7.1 > > > kernel 2.4.7. > > > > > > Thanks a lot, > > > > > > André Luiz R. Moutinho > > > Computer Engineer, COMPSIS - Computadores e Sistemas Ind. e Com. Ltda > > > moutinho@xxxxxxxxxxxxxxxxx, moutinho@xxxxxxxxxx > > > Voice: +55 12 394-13966 Fax: +55 12 322-0888 > > > > > > > > > > > > > > > > > > > > > > > > _______________________________________________ > > > Video4linux-list mailing list > > > Video4linux-list@xxxxxxxxxx > > > https://listman.redhat.com/mailman/listinfo/video4linux-list > > > > > > > > > > > _______________________________________________ > > Video4linux-list mailing list > > Video4linux-list@xxxxxxxxxx > > https://listman.redhat.com/mailman/listinfo/video4linux-list > > > > _______________________________________________ > Video4linux-list mailing list > Video4linux-list@xxxxxxxxxx > https://listman.redhat.com/mailman/listinfo/video4linux-list >
