Hi there,
I've a Sony VAIO laptop (Celeron 366 Mhz, 192 Mo SDRAM) with a NeoMagic both for audio and video.
I've installed XFree 2.4.99 on my Mandrake 9 in order to have the Xv patch. If I set the option OverlayMem to the value of about 800000 (don't remember but the correct value for NTSC fullscreen DVD watching), I've a green line at the bottom of my screen and a scratchy sound.
I've maximised this value and no problem for the green line / sound but it still not perfect.
On Xine, there is a lot of slowdown and hiccups in the sound, and it's better on mplayer or videolan. But, I think I lost a lot of frames resulting in "lines" appearing on fast move on the screen.
Is there a way to have a perfect display for DVD on such a system (poor CPU not so powerful and a shared audio / video neomagic card). Just a precision, the sound is managed by OSS.
Regards, Florent CHANTRET
FWIW, I just managed to get perfect DVD playback on my Vaio PCG-Z505HE (PIII 450MHz, 192M RAM, NeoMagic 256AV), but I don't exactly know what fixed it. My guess is that either the kernel framebuffer driver or the directfb driver initialized something on the card that the XFree86 driver doesn't. Previously the slowdown was due to writes to overlay memory in NEOCopyYV12Data() in the neomagic driver (cvs from early Dec); I'd get about 19 fps. What changed is that I tried using /dev/fb0 and directfb, and then afterward tried running mplayer and ogle using the xv driver, and voila! Perfect playback, full frame rates (24 fps), and about 20% idle CPU leftover. You may not get perfect playback on a 366 MHz machine, but if you're affected by this slowdown, you'd at least get better framerates.
BTW, one more thing that's different about my setup than yours is that since I don't have a DVD drive for the laptop, I'm nfs-mounting the DVD drive from my desktop.
So perhaps somebody with some neomagic clue (Egbert?) might be able to figure out what fixed it.
Matt
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