Microsoft VC-1 decoder on XP: No bitstream / VLD decoding possible ?

Hi everybody, I am using Microsofts VC-1 decoder ( WMVDECOD.dll version 11.0.5721.5145 ) on my computer with Windows XP SP3 together with the media player classic, and on my own computer, everything works like it should. My computer is equipped with a NVidia 9600GT graphics adapter ( latest drivers ), and the VC-1 decoder operates in IDCT mode, which is the best this GPU supports. A few days ago I upgraded a friends computer, which also uses Windows XP SP3, but this computer now is equipped with NVidias 9400 IGP chipset ( onboard GPU ), which should be able to decode VC-1 in bitstream / VLD mode. The DxVAChecker confirms this ability as it outputs ModeVC1_VLD DXVA1 NV12 720x480 / 128 x 720 / 1920 x 1080 If I use the media player classics internal VC-1 dekoder, the stats ( ctrl-j ) shows "DXVA1: VC-1 bitstream decoder", so it works like it should. If I disable the internal decoder and use Microsofts decoder instead, it reports "DXVA1: VC-1 IDCT", so the videostream is only partial decoded in the GPU. The media type of the videostream is shown as "WVC1". So my question is, am I doing something wrong, or is Microsofts VC-1 decoder simply not capable of VC-1 VLD / bitstream decoding ? The reason for the question is, that MPCs internals VC-1 decoder AFAIK has problems with interlaced VC-1 content, while Microsofts decoder has no problems which such content. That's why I, at least temporarely, would prefer to use Microsofts decoder. C.U. NanoBot

WMVDECOD.dll does not support DXVA1_ModeVC1_VLD.

For ATI users the problem is even worse. ATI only supports VC-1 full bitstream decoding, not IDCT. This means there isn't a single VC-1 decoder out there that can be used in MPC or ZP to playback the VC-1 interlaced streams that are often found as extras on BD.

You need Arcsoft Vedio Decoder or Cyberlink VC1 Decoder.

Ok, thanks for the information to all of you. Meanwhile I found a posting concerning Microsofts VC.1 decoder in another forum, which also states that this decoder does not support the VLD mode. I know that Cyberlinks VC.1 decoder supports this mode, but since this decoder actually does not connect to Haalis media splitter, it is not an option at the moment to be used together with the MPC. Mariner, do you possibly now if Arcsofts VC.1 decoder would connect to Haalis splitter ? C.U. NanoBot

You can use VC1-Tweaker to connect Cyberlink decodet to various splitters. Check the following thread. Arcsoft VC1 Deocder will only work with Arcsoft Mpeg Demux.

Hi, well, the VC1Loader for Haalis splitter works, but the result is not ok. I also have stuttering with or without DxVA, like Jay Bee has. I will pm Joniii and ask him, if he has any ideas how this problem could be solved, but it looks like he was not active on the forum since 11/27/2008. C.U. NanoBot

Great idea. Perhaps he or Madshi can be persuaded to do something similar for Arcsoft VC1 decoder as well.

Much appreciated, Jay Bee.

Is this possible for CyberLink VC-1 Decoder? What is the process?