[Linux] HOW-TO achieve perfect playback at 23.97 or 59.94 Hz with NVIDIA GPU hardware - Printable Version
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+--- Thread: [Linux] HOW-TO achieve perfect playback at 23.97 or 59.94 Hz with NVIDIA GPU hardware (/showthread.php?tid=70068)
- bobo1on1 - 2010-07-06 19:41
I'd use a 50 hertz mode instead of 25.
- Goga777 - 2010-07-06 20:07
even for 50 field per seconds video or 25 frame per second you would like to use 50 Hertz ?
Do you propose to remove mode "1920x1080_25" at all ?
- bobo1on1 - 2010-07-06 20:10
50 hertz is fine for 25 fps and 50 fps video, but 25 hertz can only do 25 fps video.
- Goga777 - 2010-07-06 20:18
but I suspected that with
for 25 fps video xbmc will choice "1920x1080_25"
but for 50 fps video xbmc will choice "1920x1080" which mean "1920x1080_50p"
- bobo1on1 - 2010-07-06 20:20
No, if 50 hertz is available it will always choose that for 25 fps.
- Goga777 - 2010-07-06 20:29
thanks, I didn't aware about it.
But let's come back to "1920x1080_50p" mode for 25 fps video. How xbmc will increase the fps from 25 fps (or 50 field per second) to 50 fps ?
- davilla - 2010-07-06 20:53
Goga777 Wrote:thanks, I didn't aware about it.
show the same frame twice 50 / 25 = 2.0000...
also, stop thinking "fields per second" unless you are taking interlaced
- Goga777 - 2010-07-06 21:03
And such idea also correct for interlaced video ?
as far as know for video with 50 field per second need very powerfull deinterlacer (hardware or software) to do such job (50 fields per second ----> 50 frame per second), right ?
what happened if vdpau graphic card doesn't have such performance or CPU is very slow ?
- bobo1on1 - 2010-07-06 22:47
Goga777 Wrote:what happened if vdpau graphic card doesn't have such performance or CPU is very slow ?Then you're screwed.
But this only happens on really slow hardware.
Problems with a JVC DILA - wmilas - 2010-07-08 03:18
I have a JVC DILA I'm trying to get running with an ION chipset. I've having a bit of a problem. I have a whole slew of modes validate correctly:
But then when the it then adds the modes it doesnt add the the 60p or 24p modes:
I'm at a loss as to why its doing this. No errors or anything? Help
- trolly - 2010-07-08 08:20
I follow this guide with success, but i just miss something in part 4.
export DISPLAY=:0; nvidia-settings -a "SyncToVBlank=1" -a "AllowFlipping=1" -a "FSAAAppControlled=1" -a "OpenGLImageSettings=3" -a "LogAniso=0" -a "GPUScaling[DFP-1]=1,1"; nvidia-settings -r
On my config (9.10 x86, svn 31642, nvidia 256.35), when I launch the command manually (ssh) it work. But after a reboot, tv don't switch in the appropriate mode anymore.
So I try to put the line in :
but it doesn't work (when I access with ssh it launch the command and xbmc work fine).
Question is : Where can I put the command so it apply settings automatically at startup ?
Sorry, not my native languague.
- JumJum - 2010-07-08 17:24
nvidia-settings requires a running Xorg to work. Try with "DISPLAY=:0; nvidia-settings -l" in ~/.xinitrc
- Goga777 - 2010-07-08 19:52
bobo1on1 Wrote:I'd use a 50 hertz mode instead of 25.
I removed 25 herz mode and now I have
Quote:Modes "1920x1080_50" "1920x1080_24_0" "1920x1080_30" "1920x1080_60"
but xbmc reported
19:12:43 T:3032754048 M:159531008 INFO: ID:0x128 Name:1920x1080 Refresh:25.000000 Width:1920 Height:1080
- trolly - 2010-07-08 23:32
Quote:nvidia-settings requires a running Xorg to work. Try with "DISPLAY=:0; nvidia-settings -l" in ~/.xinitrc
Don't seems to work.
I create a ~/.xinitrc file with the line but xbmc don't start anymore.
So I try to put it in /etc/X11/xinit/xinitrc, /etc/X11/Xsession don't work either.
The only thing that work is to start a ssh session from another pc and launch
Quote:export DISPLAY=:0; nvidia-settings -a "SyncToVBlank=1" -a "AllowFlipping=1" -a "FSAAAppControlled=1" -a "OpenGLImageSettings=3" -a "LogAniso=0" -a "GPUScaling[DFP-0]=1,1"; nvidia-settings -r.
Can't find the right place to add this.
But I have to find it cause the result is like the topic says, perfect.
- trolly - 2010-07-09 11:43
Don't know if it's clean, but it works.
1. Set $DISPLAY variable
export $DISPLAY=:0 in /etc/environnement
2. Create a file called 56nvidia-settings i, /etc/X11/Xsession.d/ which execute nvidia-settings -l
Quote:# loads nvidia-settings config