6 messages in org.freebsd.freebsd-multimediaRe: Slow DVD?| From | Sent On | Attachments |
|---|---|---|
| Nick Sayer | Aug 31, 2001 12:59 pm | |
| Kenneth D. Merry | Aug 31, 2001 1:29 pm | |
| German Tischler | Sep 1, 2001 3:33 am | |
| Søren Schmidt | Sep 1, 2001 3:41 am | |
| Jason Andresen | Sep 1, 2001 10:41 am | |
| tho...@hentschel.net | Sep 5, 2001 8:56 pm |
| Subject: | Re: Slow DVD? | |
|---|---|---|
| From: | German Tischler (tan...@gaspode.franken.de) | |
| Date: | Sep 1, 2001 3:33:52 am | |
| List: | org.freebsd.freebsd-multimedia | |
On Fri, Aug 31, 2001 at 01:00:04PM -0700, Nick Sayer wrote:
I have been disappointed so far with just about all the DVD playback options available, but I believe I have an explanation now.
I have a relatively old DVDROM drive. The virtue of it is that it's regionless. Here's what the kernel has to say:
cd1 at ahc0 bus 0 target 5 lun 0 cd1: <PIONEER DVD-ROM DVD-303 1.09> Removable CD-ROM SCSI-2 device cd1: 20.000MB/s transfers (20.000MHz, offset 8)
If someone were to "rip" a movie using a particularly naughty piece of software, it turns out that xine and vlc can both play the resulting mpg file perfectly.
If someone were to use naughty versions of xine or vlc, one would find that the playback skipped a lot of frames and looked basically crappy, but the CPU is 60% idle.
These two circumstances tell me that perhaps the drive itself is the bottleneck. Does anyone know of any magic sysctls I might try on cam to speed things up?
Do you see a performance difference between vlc directly reading a DVD and vlc reading an mpeg file on a DVD mounted as a filesystem ?
--gt