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Pixels/Artifacts in HD Videos

Discussion in 'Video playback problems' started by cintec, Jul 4, 2011.

  1. cintec

    cintec Member

    Jul 4, 2011
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    When playing a 1080p movie in MPC Im getting a lot of pixelation. I'd love to pose a img here to show the problem but I can't post a links as a new user instead you can paste this in your browser I guess.


    I thought HD formats were supposed to be better than this? Or maybe Im missing something?

    Heres what I know about the movie file.

    Format                           : Matroska
    File size                        : 8.06 GiB
    Overall bit rate                 : 5 537 Kbps
    Writing application              : mkvmerge v2.9.7 (Tenderness) built on Jul  1 2009 18:43:35
    Writing library                  : libebml v0.7.7 + libmatroska v0.8.1
    ID                               : 1
    Format                           : AVC
    Format/Info                      : Advanced Video Codec
    Format profile                   : High@L4.1
    Format settings, CABAC           : Yes
    Format settings, ReFrames        : 5 frames
    Muxing mode                      : Container profile=Unknown@4.1
    Codec ID                         : V_MPEG4/ISO/AVC
    Duration                         : 3h 28mn
    Bit rate                         : 4 536 Kbps
    Width                            : 1 920 pixels
    Height                           : 788 pixels
    Display aspect ratio             : 2.437
    Frame rate                       : 23.976 fps
    Resolution                       : 24 bits
    Colorimetry                      : 4:2:0
    Scan type                        : Progressive
    Bits/(Pixel*Frame)               : 0.125
    Writing library                  : x264 core 72 r1235M 448b138
    Encoding settings                : cabac=1 / ref=5 / deblock=1:-2:-2 / analyse=0x3:0x113 / me=umh / subme=10 / psy=1 / psy_rd=1.0:0.0 / mixed_ref=1 / me_range=64 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=12 / nr=0 / decimate=1 / mbaff=0 / bframes=10 / b_pyramid=0 / b_adapt=2 / b_bias=0 / direct=3 / wpredb=1 / keyint=240 / keyint_min=24 / scenecut=40 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=18.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / vbv_maxrate=50000 / vbv_bufsize=50000 / ip_ratio=1.40 / aq=2:1.00
    Im a newb when it comes to understanding the different formats and encoding options etc. But I usually associate key phrases like HD, 1080p, 720p, with more quality than this. Ive tried playing this in MPC and VLR with the same results. Is there anything I can check/change/do to clean this up or is it just the way it is?

    Heres system specs if you need them.

    Dual-boot XP 32-bit and Win7 64-bit (pic was taken from XP)
    CPU: Intel Core2Duo E6750 2.66GHz
    Vid: Nvidia Geforce 560Ti
    4 GB DDR2 RAM
  2. praetorian65

    praetorian65 Member

    Jul 5, 2011
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    The resolution and bitrate look fine for HD video but this video will only be as good as the source that was used to create it. If a DVD is ripped and re-encoded at 1080p you will not get a blu-ray quality picture.

    Download the 'Avatar' Trailer in 1080p and give it go.

    If you get the same pixelation it could be a codec or graphics driver issue. Download new ones. If the video plays in all its glory then it is likely your movie that is at fault.

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