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Thread: Frustrating video problem with Nvidia

  1. #1
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    Jun 2008
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    Frustrating video problem with Nvidia

    I have tried several Nvidia cards and drivers and even different monitors but I cannot fix this issue.

    The video playback for any video file (but mostly HD videos) is just not perfect.

    About a quarter of the way down from the top of the screen I always get this slight line during motion of a video that kind of distorts to the right creating what seems like some horizontal sync issue.

    It's like the picture is slightly pushed over for a small area.

    This happens on all HD videos regardless of screen resolution or monitor that I try.

    It happens in all video players ....mplayer, vlc, xbmc, totem....

    I have resorted to using Windows 7 as my OS for my media player but i really want to use Ubuntu but cannot get perfect video playback.

    I have tried with both 32bit and 64bit 10.10 but it doesn't make difference.

  2. #2
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    Re: Frustrating video problem with Nvidia

    Can anyone confirm if what I am experiencing is normal?

    Does anyone else get absolutely perfect video playback at 720p/1080p with Nvidia cards?

  3. #3
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    Re: Frustrating video problem with Nvidia

    Did you install libvdpau1
    I got these lines but I dont see them when I watch the video, only in screenshots.
    Here is a screenshot of a full HD video:


  4. #4
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    Re: Frustrating video problem with Nvidia

    Yes that is enabled and in XBMC it even shows that it is in use during playback.

    The video is perfect other than during motion where i get this jittering effect in that area of the screen.

  5. #5
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    Re: Frustrating video problem with Nvidia

    This is called video tearing, and is caused by the graphics card pushing out frames at a different rate than your monitor can display them

    Try enabling "sync to blank" in the nvidia-settings program
    also, if you use compiz, enable sync to blank in there as well (under the general > display in the compizconfig-settings-manager)

    Annoyingly, I can't fix my tearing, as it's caused by my monitor and outside of any software's control

    I've got a graphics card with DVI only connectors, going via one of those DVI-VGA adapters, going into an analogue input flatscreen monitor

    Refresh rate ends up as a non-integer (60.02 Hz)
    so I get tearing and no way to fix it
    Code:
    while [ true ]; do CY=$(date +%y); CM=$(date +%m); if [ -n "$PY" ] && [ -n "$PM" ]; then echo "Ubuntu ${CY}.${CM} is the worst release ever"; echo "I'm going back to ${PY}.${PM}"; fi; PY="$CY"; PM="$CM"; sleep 182d; done

  6. #6
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    Re: Frustrating video problem with Nvidia

    I set that sync in all the places I could find it and it looks like that has totally solved the problem.

    Thanks a lot!

  7. #7
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    Re: Frustrating video problem with Nvidia

    I had the exact same problem, didn't help to enable sync to black in the nvidia preferences. However, running sudo apt-get install compizconfig-settings-manager and change the refresh rate to 60hz worked for me!

  8. #8
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    Re: Frustrating video problem with Nvidia

    I am running a GeForce 8400GS card with a dual core machine (2.8GHz) and 2 GB RAM and get lusy HD playback... stuttering and slow speed. The monitor shows 100% CPU usage but only 360MB of RAM used! I think we have some serious issues here with system utilization!

  9. #9
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    Re: Frustrating video problem with Nvidia

    Quote Originally Posted by sonicb00m View Post
    I have tried several Nvidia cards and drivers and even different monitors but I cannot fix this issue.

    The video playback for any video file (but mostly HD videos) is just not perfect.

    About a quarter of the way down from the top of the screen I always get this slight line during motion of a video that kind of distorts to the right creating what seems like some horizontal sync issue.

    It's like the picture is slightly pushed over for a small area.

    This happens on all HD videos regardless of screen resolution or monitor that I try.

    It happens in all video players ....mplayer, vlc, xbmc, totem....

    I have resorted to using Windows 7 as my OS for my media player but i really want to use Ubuntu but cannot get perfect video playback.

    I have tried with both 32bit and 64bit 10.10 but it doesn't make difference.
    I have perfect HD playback. Using Debian and the nvidia drivers installed from the scripts fron nvidias site.

    For HD playback on nvidia Linux you must have:

    1. A card that knows VDPAU hardware decoding - h264 and some other compressions supported (8xxx series and up, excluding certain high end gtx cards, look up on wikipedia).
    8400gs is the lowest one that does this, but some of its versions might not have VDPAU support (older chips).

    http://en.wikipedia.org/wiki/Nvidia_..._.28HD.29_GPUs

    Feature set C is recommended, it supports the most image formats and compressions.

    2. A driver that enables VDPAU (the nvidia-provider .run driver has all functions, including vdpau), you have to install the libvdpau package if you use the stock driver. I is recommended to use the latest available driver because they typically have many vdpau-related enhancements.

    3. A video player that supports VDPAU - i found smplayer to be the best. Totem (AKA Movie Player) and Vlc DO NOT support VDPAU currently.

    Also, mplayer (or any other) has to be built with vdpau support. In the Debian repos this is standard, i dont know how it is in Ubuntu any more, maybe some PPA is required.
    And you have to explicitly tell the program to use VDPAU (the default is typically xv output).

    Problems i encountered: sometimes i had the tearing effect - i disabled xorgs composite extension from xorg.conf and i had perfect VDPAU playback (and no desktop effects, but i dont have compiz installed anyway).

    Now it seems to work even with the composite extension (i reinstalled because of a hdd failure).

  10. #10
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    Re: Frustrating video problem with Nvidia

    Quote Originally Posted by stephenmoore View Post
    I am running a GeForce 8400GS card with a dual core machine (2.8GHz) and 2 GB RAM and get lusy HD playback... stuttering and slow speed. The monitor shows 100% CPU usage but only 360MB of RAM used! I think we have some serious issues here with system utilization!

    Stephen I had similar problems and have posted a slightly detailed how-to here:

    http://ubuntuforums.org/showthread.php?t=1637794

    The above is for Hardy but at the top there are links for other versions...

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