h.264

[LantisEscudo]

There are some graphics cards out there onto which you can actually offload the decoding work, like NVIDIA and ATI's latest cards. That does make a difference in CPU usage.

However, when I write "latest", I really mean "latest".

All the graphics cards that I've seen that advertise "hardware video decoding" are talking about MPEG-2 and DVD decoding, and I've used ones that claimed that as a feature as far back as 2002.

Do the cards you're talking about do more than that, like DivX/XviD/MPEG-4 hardware decoding? If so, do you have a link where I can read more, as having a card with extensive hardware video decoding support interests me very much.

[Bauzi]

From Bauzi:



Uhm I don´t want to open up a new thread so I post it here, because it is also about the h.264...

Virtual Dub Mod has problems with h.264

Well I can´t really open the mkv file in VDM. The prog. scanns the file and after the work a error comes (look a little bit up for the picture ^^'). I don´t know why it doesn´t work. The file runs with out problems on the VCL-Player.
Is it a codec problem? And how can I "patch" VDM, that it can work with the file?
I´ve also tryed it with avisynth, but it didn´t work too! Or does avisynth need a special plugin or such a thing?

[Qyot27]

From Bauzi:



Uhm I don´t want to open up a new thread so I post it here, because it is also about the h.264...

Virtual Dub Mod has problems with h.264

Well I can´t really open the mkv file in VDM. The prog. scanns the file and after the work a error comes (look a little bit up for the picture ^^'). I don´t know why it doesn´t work. The file runs with out problems on the VCL-Player.
Is it a codec problem? And how can I "patch" VDM, that it can work with the file?
I´ve also tryed it with avisynth, but it didn´t work too! Or does avisynth need a special plugin or such a thing?

You can't 'patch' VDM, it will not support ISO-AVC - or any DirectShow based decoding scheme - until VDub itself supports the proposed non-VFW-dependent framework I had heard about quite a long time ago (and still isn't implemented, AFAIK), and then that proceeds to be adapted into the VDM project.

Either there are subtitle streams that VirtualDubMod doesn't support (i.e. VobSub, SSA/ASS, etc.), there's not enough memory resources, it's an outdated version of VDM (current version: 1.5.10.2 and bugfix 2542), or it's an ISO-AVC stream.

The only reliable way of doing it is using Graphedit to create a .grf file consisting of only the splitter and the video decoder, and then open that .grf file with DirectShowSource.

[trythil]

Do the cards you're talking about do more than that, like DivX/XviD/MPEG-4 hardware decoding?

Yeah, I'm referring to stuff like hardware H.264 decoding, which is present in high-end NVIDIA and ATi cards.

http://www.bit-tech.net/news/2006/01/07 ... code_h264/
http://www.theinquirer.net/?article=25000
http://www.theinquirer.net/?article=24162