Slight Judder
#1
Hey guy's i've just set up XBMX live on my acer revo and it's all nice and swish expect i seem to be having a problem when playing back mkv's I'm getting a slight judder every now and again it's more noticeable on some than others every so often the video will stutter as if it's dropping frames or some thing.

Anyone else get this?
Reply
#2
Should work fine.. I guess it is HD mkv's?
Make sure you have chnaged shared memory => 512mb

BTW, it is Live 9.11alpha? Otherwise you will have to upgrade the nvidia drivers
Reply
#3
Try it with custom modlines in xorg.conf. For me the built in 1920x1080@50p resolution made the problem. I changed to modelines. Now it is working fine.
Always read the XBMC online-manual, FAQ and search the forum before posting.
Do not e-mail XBMC-Team members directly asking for support. Read/follow the forum rules.
For troubleshooting and bug reporting please make sure you read this first.
Reply
#4
vikjon0 Wrote:Should work fine.. I guess it is HD mkv's?
Make sure you have chnaged shared memory => 512mb

BTW, it is Live 9.11alpha? Otherwise you will have to upgrade the nvidia drivers

Yeah they are hd, i have set the memory to 512, not sure what version it is if i'm honest new to all this.

alanwww1 Wrote:Try it with custom modlines in xorg.conf. For me the built in 1920x1080@50p resolution made the problem. I changed to modelines. Now it is working fine.

How do i do that?
Reply
#5
Eldandoerino Wrote:Yeah they are hd, i have set the memory to 512, not sure what version it is if i'm honest new to all this.

How do i do that?

Here is a well working xorg.conf.

Yo can edit it opening a terminal:
Code:
sudo gedit /etc/X11/xorg.conf

Clear ALL lines and insert:

Code:
Section "Device"
  Identifier  "Device0"
  Driver      "nvidia"
  VendorName  "NVIDIA Corporation"
EndSection

Section "Screen"
  Identifier  "Screen0"
  Device      "Device0"
  Monitor     "Monitor0"

  # Fixes issue with modesetting on xbmc
  Option      "ExactModeTimingsDVI"       "True"
  Option      "UseEDIDFreqs"              "False"
  Option      "ModeValidation"            "NoEdidModes, NoMaxPClkCheck, NoEdidMaxPClkCheck, AllowNon60HzDFPModes"

  # Fixes tearing/smoothvideo issues
  Option      "DynamicTwinView"           "False" # disable or you'll get tearing
  Option      "TripleBuffer"              "0" # disable or xbmc will segfault with smoothvideo

  # Misc
  Option      "NoLogo"                    "True"
  Option      "HWcursor"                  "Off"

  DefaultDepth  24
  SubSection "Display"
    Depth       24
    Modes     "1920x1080@50p" "1920x1080@60p" "1920x1080@24p" "[email protected]" "[email protected]" "1920x1080@60i"
  EndSubSection
EndSection

Section "Monitor"
  Identifier  "Monitor0"

  HorizSync   14.0 - 70.0
  VertRefresh 24.0 - 62.0

  Modeline    "1920x1080@24p"     74.230 1920 2560 2604 2752 1080 1084 1089 1125 +hsync +vsync
  Modeline    "1920x1080@50p"    148.500 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync
  Modeline    "[email protected]"  74.176 1920 1960 2016 2200 1080 1082 1088 1125 +hsync +vsync Interlace
  Modeline    "[email protected]" 148.352 1920 1960 2016 2200 1080 1082 1088 1125 +hsync +vsync
  Modeline    "1920x1080@60i"      74.25 1920 1960 2016 2200 1080 1082 1088 1125 +hsync +vsync Interlace
  Modeline    "1920x1080@60p"    148.500 1920 2008 2056 2200 1080 1084 1089 1125 +hsync +vsync
EndSection

Section "Extensions"
  # fixes tearing with vdpau/vsync
  Option      "Composite"           "Disable"
EndSection

Reboot.

Note that this is strictly for 1920x1080 HDTVs. All other resolutions are blocked. In xbmc 9.11 alpha you have to choose 1920x1080@50 NOT (!!!) 1080p50 !
Always read the XBMC online-manual, FAQ and search the forum before posting.
Do not e-mail XBMC-Team members directly asking for support. Read/follow the forum rules.
For troubleshooting and bug reporting please make sure you read this first.
Reply
#6
Ok i've tried that but now i've just got a small box in the center of my screen.

Edit ok i've sorted that needed to change the resolution.

Edit Edit: Ok got it now running at 1920x1080@50 just check and it still seems to be happening it's like a slight stutter.
Reply
#7
Eldandoerino Wrote:Ok i've tried that but now i've just got a small box in the center of my screen.

Edit ok i've sorted that needed to change the resolution.

Edit Edit: Ok got it now running at 1920x1080@50 just check and it still seems to be happening it's like a slight stutter.

What content are you playing ?

Use "adjust refresh rate" in xbmc vide settings.
Also enable sync playback to display there.

This way if you want to play a 24fps movie xbmc will change the refresh rate to 24hz (if your TV supports it)

On samsung LCDs you also have to set "just scan" option instead of any zoom or 16:9 mode.
Always read the XBMC online-manual, FAQ and search the forum before posting.
Do not e-mail XBMC-Team members directly asking for support. Read/follow the forum rules.
For troubleshooting and bug reporting please make sure you read this first.
Reply
#8
I'm playing 1080p films, I’ll check the adjust refresh rate and enable sync playback when I get home from work, I take it enable sync playback is done through in XBMC.

Cheers for the help by the way much appreciated.

Edit: Home from work and i've set the resolution the 1920x1080 @60Hz also added the vertical sync durring play back and added adjust refresh rate and IT WORKS! Excellent! thanks a lot for the help man chuffed to bits with my revo now!
Reply
#9
alanwww1 Wrote:Also enable sync playback to display there.

I don't see this option anywhere... Is this only in 9.11?
Reply
#10
nvous23 Wrote:I don't see this option anywhere... Is this only in 9.11?

It was not there with the previous stable release !
Always read the XBMC online-manual, FAQ and search the forum before posting.
Do not e-mail XBMC-Team members directly asking for support. Read/follow the forum rules.
For troubleshooting and bug reporting please make sure you read this first.
Reply
#11
I posted my issues already in another thread, been playing arround with this issue for a couple of weeks without any success.
The sample here produces judder in xbmc, mplayer vdpau works fine.
Reply
#12
Hi, I tested your Sample, and I have the same issue. No dropped frames, exept the ones in the start, and VDPAU working.

It doesn't flow as I want, it plays with a small jidder/judder.

I have "tuned" my xorg.conf already and tested a bunch of things with sync settings, nothing helps. Haven't tested "stand-alone" XBMC yet, as someone suggested, if that makes a difference.

Any Idées?

(Zotac Ion A, Ubuntu 9.10, Nvidia 195.30)
Reply
#13
panosdl: Do you have 24fps? If 24p isn't working you'll get this small judder because XBMC has to upscale 24 pictures per second to 25.
XBMCLive Dharma beta 2 running on an ASRock ION 330 HT
Reply
#14
I've tested Stand-Alone, and that didn't make any difference.
Same small judder/jidder.
Reply
#15
panosdl: set the vertical blank sync option in the settings and tell me the fps.
XBMCLive Dharma beta 2 running on an ASRock ION 330 HT
Reply

Logout Mark Read Team Forum Stats Members Help
Slight Judder0