[mythtv-users] PVR350 video out very slow (Nvidia way better)
hislen at mindspring.com
Fri Feb 6 11:58:57 EST 2004
Well a PVR350 is a PVR350, so the only "customizable" things in that file
are the fbN and the busID.
Yes I did set them to correct values (I would not habe an image otherwise
Regarding the X11 thread you pointed out I do not think this is the same
For one my CPU is not hosed at all, not one process is taking more than 1%
of CPU in "top".
I did follow the ivtv wiki but found it had some limitations. I mean having
installed with FC1 and ATrpms with Jarod's guide, I could not do the
ivtvfbctl /dev/fb0 -noglobalalpha -localalpha
The file ivtvfbctl not being anywhere on my machine.
I did also follow the instructions in the list, and looking at them as well
as at the wiki again I realize I do not have the following in modules.conf:
post-install ivtv /usr/local/bin/test_ioctl -d /dev/video0 -u 0x3000
post-install ivtv /usr/local/bin/test_ioctl -d /dev/video16 -u 0x3000
post-install ivtv /usr/local/bin/test_ioctl -d /dev/video32 -u 0x3000
post-install ivtv /usr/local/bin/test_ioctl -d /dev/video224 -u 0x3000
I'll try with those...
De : mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org]De la part de Nick Kaijaks
Envoye : Friday, February 06, 2004 6:29 AM
A : 'Discussion about mythtv'
Objet : RE: [mythtv-users] PVR350 video out very slow (Nvidia way
> I hope this is not one of these questions that have been
> asked a hundred
> times. I looked in the archives but did not find a solution.
Do you want the good news or the bad news :-)
> Anyway when I try to use the PVR350 TV-out, with a XF86Config file I
> grabbed from this mailing list, it works but the quality is TERRIBLE
> choppy video and sound.
> mythfrontend output when using PVR350 tv-out
> * Couldn't find Xv support, falling back to non-Xv mode.
> * MythTV performance will be much slower since color
> * conversion and scaling will be done in software.
> * Consider upgrading your video card or X server if
> * you would like better performance.
> * Your system is not capable of displaying the
> * full framerate at 720x480 resolution. Frames
> * will be skipped in order to keep the audio and
> * video in sync.
OK, AGP is irrelevant with the PVR-350, because all the
processing/bandwidth is handled on the card itself. The logged error
tells you that X is having driver problems (as in:)
Note that this is the same *symptom* but for a different card, so it
probably needs a *different* solution. Anyway, I'm no guru, but looking
at your XF86Config, the device details for the PVR350 framebuffer are
exactly as written in the archives. Have you actually followed the
instructions in the list?
or the ivtv wiki?
because it isn't all cut and paste - you do have to do *some* work for
yourself, y'know! :-)
In particular, when you do 'modprobe ivtv-fb' and look at
/var/log/messages, do you see something like:
fb1: iTVC15 TV out frame buffer device
Whatever you see at the start of the line indicates the device (in /dev)
that needs to go in your XF86Config, so for me it's:
Option "fbdev" "/dev/fb1"
instead of /dev/fb0 as listed. Secondly, when I run 'lspci -v | grep
iTVC15', I get:
00:14.0 Multimedia video controller: Internext Compression Inc iTVC15
MPEG-2 Encoder (rev 01)
The first bit is the bus ID in hex. I convert it to decimal (14h = 20d)
and stick it in the XF86Config:
instead of 01:08.0 as listed.
Check those out and restart X (rebooting may be easiest if it's your own
box), and see if that gets the drivers talking Xv.
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