AMD RX470 & Hardware Decoding

Discussion in 'Codecs, External Players' started by scouseman, December 11, 2016.

  1. scouseman

    scouseman Portal Member

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    Hi, My TV recordings in MP are done in HD, but I cannot play them back without the picture stuttering, it seems apparent to me that MP is using software decoding as I am using a AMD rx470. I cant seem to get the video to play back without stuttering and pixelating. The ts video file is from a BBC HD satellite recording. The same problem exists from a live stream on the same channel.

    Edit: I have also tried DXVA2 (native)



    My Tv codec setting

    [​IMG]

    My video codec setting:

    [​IMG]
     
    Last edited: December 11, 2016
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  3. pünktchen

    pünktchen Portal Pro

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    DXVA is brocken in all AMD RX### cards with every driver version since the beginning, at least for interlaced hd content:
    https://community.amd.com/message/2736923
    If you just bought this card, better return it and try Nvidia.
     
  4. scouseman

    scouseman Portal Member

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    Hi, thanks for the link, seems very strange that, more people aren't having this problem and that AMD still haven't resolved it, I suppose some people won't know if their video is being hardware or software decoded.
    I managed to get the video the play by enabling software de-interlacing and selecting YADIF, but I guess that is just pushing most of the decoding to my cpu.

    I don't suppose this will be fixed anytime soon, I will need to seriously consider returning the card back, which would be a real shame as I got it for a decent price.
     
  5. Crix1990
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    Crix1990 MP Donator

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    Hmmm....Sorry, that could not be right.
    I'm using a RX460 since October and it works.
    But you have to choose native DXVA.
     
  6. pünktchen

    pünktchen Portal Pro

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    Sorry, but it seems you don't know what you are talking about.
    The DXVA problem is a fact, that is reported in several threads at the AMD community and other forums.
    Here is a more complete one: RX480 DXVA H.264 not working. | Community

    Btw. AMD after over six month, has just released a new driver that fixes most DXVA issues. What a shame!
    Radeon Software Crimson ReLive Edition 17.2.1 Release Notes
     
  7. Crix1990
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    Crix1990 MP Donator

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    Hmmm...I never had AMD related issues with my RX460 using DXVA with Mediaportal.
    From version 16.4.x till 17.2.1...
     
  8. pünktchen

    pünktchen Portal Pro

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    Than just be happy [emoji41]
     
  9. joecrow
    • Team MediaPortal

    joecrow Test Group

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    I aggree that this problem and other h264 issues (long stop times etc.) can be avoided by using "Native" or indeed disabling HW acceleration for h264 and letting the software handle it (with just a minor increase in cpu load). The downside, however for me, was that with my RX 460 in "Native" the picture quality for non-hd TV was absolutely awfull, so I am very happy to see a fix with the latest drivers and would strongly recommend you give "Copy-Back" a try.
     
  10. Crix1990
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    Crix1990 MP Donator

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    By the way: Is there a nice a aricle or something that explaines, the dieeference?
     
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