[confirm] 1.4.0 Prerelease introduced horizontal tearing for TV and recorded TV playback (3 Viewers)

Al_Capone

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  • September 26, 2006
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    MediaPortal Version: 1.3.0

    Description
    Depending on scene, but when camera is panning, there is very clear horizontal tearing line.
    This was not a problem with 1.3.0

    Steps to Reproduce:
    Start Tv/playback TV, and wait for a scene with camera panning.[DOUBLEPOST=1370806506][/DOUBLEPOST]codec properties attached:

    Screenshot from 2013-06-09 21:34:31.png
     

    kiwijunglist

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  • June 10, 2008
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    Your graphic card (HD4290) is too slow for hardware acceleration + deinterlacing of 1080i HDTV

    Horizontal tearing can be fixed with vsync (see screenshot below)

    Post screenshot after playing fullscreen tv and pressing SHIFT+1 and waiting a while.

    Untitled-1.gif
     
    Last edited:

    Al_Capone

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    thank you, I'll see if enabling vsync helps.
    This question was about SD TV, no HD. Also, as mentioned, Ive never see this effect on 1.3.0 , nor did I had any trouble playing HD movies (guess they are mostly progressivly encoded.).
    screenshot of the test attached.
    Maybe 1.3.0 or the codec requested vsync before ? otherwise it's hard to tell what changed since 1.3.0
    -BTW this is the only "TV" at home, it's the main enterntainment system in the living room, so my wife does notice any change. :)[DOUBLEPOST=1370819998][/DOUBLEPOST]no, enabling vsync did not solve it, did another test too.
    It seems the 23 dropped frames in first test, was due to MP being fresh-strated.[DOUBLEPOST=1370820067][/DOUBLEPOST]MAy it be the updated codecs that were installed during 1.4.0 installation ? - I suspect them.
     

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    kiwijunglist

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    This is horizontal tearing, if my understand is correct, if you have vsync enabled it should be impossible to see a tearing.

    408412027688495


    Your shift+1 is strange, in that it doesn't show the usual amount of information I am used to seeing. So I don't have enough information to help you.

    Untitled.png

    PS. Make sure you don't use MP Audio render, or vsynch adjustment/time-stretching etc in the audio render/codecs. This features are only for video that can be speedup/slowed down, You can't do this with live TV.[DOUBLEPOST=1370822141][/DOUBLEPOST]
    MAy it be the updated codecs that were installed during 1.4.0 installation ? - I suspect them.

    I can't even tell what codecs are in use, but if you have zero drop frames then any horizontal tearing is caused by not having vsync enabled. Changing the audio render + codec settings to disable everything related to synch/time stretching may eliminate the tearing in live tv, but I would of expecting enabling vsync would eliminate any tearing caused by the audio render/codec adjusting the timing / fps+hz missmatching.
     

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