How come Purevideo Decoder never works in Hardware mode with ffdshow?

[TheRyuu]

I'm not really sure if everyone has this problem, but Purevideo Decoder never seems to work in hardware mode when I use ffdshow with it.

Why not? Is it because of some hardware limitation or is the software just too stupid to figure something out? 🙂

Not that it's really a problem, my dual core Opty has plenty of CPU power (with some to spare), but I'm just curious why it never works in hardware mode.

 

[TheRyuu]

up

 

[Goi]

It's a known issue that hardware acceleration will not be engaged if ffdshow is used. I think it applies to ATI as well, not just nvidia's Purevideo.

 

[TheRyuu]

Originally posted by: Goi
It's a known issue that hardware acceleration will not be engaged if ffdshow is used. I think it applies to ATI as well, not just nvidia's Purevideo.

I know it's an issue, I'm just wondering why it doesn't work.

 

[ViRGE]

Originally posted by: wizboy11

Originally posted by: Goi
It's a known issue that hardware acceleration will not be engaged if ffdshow is used. I think it applies to ATI as well, not just nvidia's Purevideo.

I know it's an issue, I'm just wondering why it doesn't work.

I'd guess the ffdshow guys haven't programmed it to be DXVA aware.

 

[Peter]

ffdshow's advanced rendering and "hardware accelerated" video are alternate methods for the same thing - rendering the incoming DVD data onto the screen surface. Thus, it's either this or that.

 

[xtknight]

Originally posted by: Peter
ffdshow's advanced rendering and "hardware accelerated" video are alternate methods for the same thing - rendering the incoming DVD data onto the screen surface. Thus, it's either this or that.

What do you mean by screen surface? Display context? 3D surface?

 

[Peter]

Whatever - primary screen surface, hardware overlay buffer, DirectX or OpenGL texture. All those strategies are feasible, and in fact are being used.