Xvid play back pixelated on lcd not crt

Discussion in 'DivX / XviD' started by tjonz_98, May 7, 2009.

  1. tjonz_98

    tjonz_98 Member

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    Hi I am new to these forums so I hope you guys can help me.

    I have recently switched to a LCD TV for my computer display (Vizio 26"} from a 19" CRT. When I play back XVids on this display they are badly pixilated or posterized. Is there a way to filter them to make for correct play back. They never appeared this way before on my CRT monitor. I noticed that some files using the x264 codec seem to play back ok.

    System Specs in case they help:
    p4 2.8ghz
    EVGA 7800gs co Superclock
    3 gigs of pc3200
    Turtle beach Montego
     
  2. MysticE

    MysticE Active member

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    How are you hooking up the computer to the TV?
     
  3. tjonz_98

    tjonz_98 Member

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    It is connected via VGA cable. Also i am using the latest xvid codec.
     
  4. davexnet

    davexnet Active member

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    What about the LCD TV native resolution and refresh rate ?
    Is the computer using these settings?


     
  5. tjonz_98

    tjonz_98 Member

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    I am running 1360 x 768 at 60 hz which should convert over to 720p. I have done some research and believe that it may be to poor quantization on the videos. I read some where that LCDs have trouble displaying this. I however don't exactly know what quantization is or if I can correct this. Any in site would be greatly appreciated.
     
  6. davexnet

    davexnet Active member

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    Why don't you spin off a 10 or 20 second clip and let
    somebody take a look. (post it to a file hosting site and put the
    URL in here)

    In general, any quality loss due to too low a bitrate
    cannot be recovered. Unless, of course, you have the original
    source - in which case you can do a fresh encode.
     
  7. MysticE

    MysticE Active member

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    Well one thing to note is that dedicated PC monitors are different than TVs.

    Your old 19" CRT probably had a resolution of 1600 x 1200. A 24" PC monitor has 1920x1080 resolution.
     
  8. tjonz_98

    tjonz_98 Member

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    My CRT monitor was capable of 1600x1200 where the 26" LCD is capable of 1360x768. I think the xvids are encoded with an old version of the xvid codec using low motion which may account for the varying quality of some vids.
     

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