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Pixelation Through Direct Play via OpenPHT

SturmieSturmie Posts: 26 Plex Pass

Any idea what's causing this occasional pixelation? It seems to only happen every so often with a certain type of encoding...others play perfectly fine. I'm using OpenPHT (latest version) and having my PMS direct play to my PC. It only lasts a few seconds, but it is annoying. If I play the file in Windows Media Player (with the proper corresponding codecs installed), the file plays perfectly fine.


  • DuffHQDuffHQ Posts: 54 Plex Pass

    I'm seeing the same thing on my odroid-c2, but only when I skip back and forth in the movie.. takes a few seconds to "resync"

  • SturmieSturmie Posts: 26 Plex Pass

    For reference, here are the video details from MediaInfo:

    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : High@L4.1
    Format settings, CABAC : Yes
    Format settings, ReFrames : 9 frames
    Codec ID : V_MPEG4/ISO/AVC
    Duration : 56mn 8s
    Bit rate : 3 523 Kbps
    Width : 1 280 pixels
    Height : 720 pixels
    Display aspect ratio : 16:9
    Frame rate mode : Constant
    Frame rate : 23.976 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.159
    Stream size : 1.38 GiB (83%)
    Writing library : x264 core 144 r2525 40bb568
    Encoding settings : cabac=1 / ref=9 / deblock=1:-3:-3 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=48 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=0 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc=crf / mbtree=0 / crf=17.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.30 / pb_ratio=1.20 / aq=3:0.80

    Language : English
    Default : Yes
    Forced : No

  • daniel.culldaniel.cull Posts: 283 Plex Pass

    does it happen when seeking/skipping only?

  • SturmieSturmie Posts: 26 Plex Pass
    edited May 9

    It actually happens during playback for 3-4 seconds each time. I'm not ffwd'ing or seeking when it happens.

  • daniel.culldaniel.cull Posts: 283 Plex Pass

    what is your version of OpenPHT and what are OS are you running it on? (dont reply with 'latest' please
    What version of PMS are you running?

  • SturmieSturmie Posts: 26 Plex Pass

    Windows 7, 32-bit



  • daniel.culldaniel.cull Posts: 283 Plex Pass

    are you display drivers up to date? what is your graphics card?

  • SturmieSturmie Posts: 26 Plex Pass

    Intel HD Graphics

    I'll have to get the exact model and drivers here soon. I do know that it's an i3-550 processor on the machine running OpenPHT.

  • SturmieSturmie Posts: 26 Plex Pass

    So, apparently my dumb @ss forgot to install the official Intel HD Graphics drivers when I rebuilt it a few weeks ago and let Windows 7 use its own. I updated the display drivers and will keep monitoring the situation to see if this happens again moving forward.

  • daniel.culldaniel.cull Posts: 283 Plex Pass

    i suspect that will probably fix it yea

  • SturmieSturmie Posts: 26 Plex Pass

    Thanks for the help, btw.

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