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Thread: XvMC To Support More Video Standards?

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  1. #1
    Join Date
    Jan 2007
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    Default XvMC To Support More Video Standards?

    Phoronix: XvMC To Support More Video Standards?

    While the XvMC (X-Video Motion Compensation) extension is reliable for offloading MPEG video decoding to the GPU, its limitation is that it only supports MPEG video formats and nothing more. We had expected XvMC not to be around much longer, since Intel has been devoting resources in creating a new video extension for X.Org...

    http://www.phoronix.com/vr.php?view=NjM1Ng

  2. #2
    Join Date
    Feb 2008
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    The modified (and open source) libxvmc in the openChrome Project have supported offloading of MPEG-2, MPEG-4 ASP (MPEG-4 part 2) and MPEG-4 AVC / H.264 (MPEG-4 part 10) video on VIA Unichrome graphics hardware for a few years now. Thanks to not only Motion-Compensation and iDCT but also VLD (Variable Length Decoding.
    http://www.openchrome.org
    http://www.mythtv.org/wiki/index.php/XvMC#Unichrome
    http://wiki.openchrome.org/tikiwiki/...ardwareCaveats


    ...I still have my hopes high for VA API to fully replace XvMC though, but more GPU manufactures needs to jump on the VAAPI project for that to happen.

  3. #3
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    Oct 2007
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    Quote Originally Posted by Gamester17 View Post
    The modified (and open source) libxvmc in the openChrome Project have supported offloading of MPEG-2, MPEG-4 ASP (MPEG-4 part 2) and MPEG-4 AVC / H.264 (MPEG-4 part 10) video on VIA Unichrome graphics hardware for a few years now.
    AFAIK, there hasn't been support for H.264, only MPEG-4 ASP. And I don't think that has been really functional either, as can be seen on the HardwareCaveats Wiki page you linked to. VIA doesn't yet have hardware support for H.264 decoding.

  4. #4
    Join Date
    Nov 2007
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    Default AMDTI?

    I was recently stunned that fglrx installed without trouble^ and furthermore after installing an extra package I got "desktop effects" working on my Radeon X1950 GT under Ubuntu 7.10

    Amazing!

    Are you now suggesting I might be able to offload MPEG2 (HDTV) decoding the GPU? This is exactly what I have been needing for a HTPC solution for over the last 2 years (if not more).

    How do I go about it?

    ^it might be the case of a colour distortion on HDTV channels.

  5. #5
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    Feb 2008
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    Quote Originally Posted by an0n1m0us View Post
    Are you now suggesting I might be able to offload MPEG2 (HDTV) decoding the GPU? This is exactly what I have been needing for a HTPC solution for over the last 2 years (if not more).

    How do I go about it?
    See MythTV article on XvMC for the HOW-TO:
    http://www.mythtv.org/wiki/index.php/XvMC

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