Optimal settings of LAVF for ATI graphics card (1 Viewer)

[somy]

Hi,

Is there a recommanded settings of LAVF that works best with ATI graphics card?
The EVR renderer does a pretty bad job converting YUV to RGB, and it produces lots of banding due to the lack of proper dithering, so DXVA2 native isn't an option. On the other hand, if we let LAVF output RGB, EVR lose the possibility to do hardware deinterlacing.
Is it possible to get both HW deinterlacing and banding-free image?

 

[toutoune290]

+1

 

[Spooky]

The EVR renderer does a pretty bad job converting YUV to RGB, and it produces lots of banding due to the lack of proper dithering, so DXVA2 native isn't an option.

Isn't that more a driver issue, than an issue with EVR directly?

 

[somy]

Hi Spooky,

Yes, it is a driver issue.
Is there anyway around it?

 

[Spooky]

Well, I have searched around a bit. What display device do you have? Anyway within the driver you only have the following possibilites

- Video -> Advanced Color -> Dynamic Range
- Pixel format (in the properties of each individual Display)

So, for instance, if you set the dynamic range to 16-235 and the pixel format output to 'Limited RGB', you'll have a range of 16-235 from beginning to end, if you watch YCbCr content (if I understand this correctly), thus eliminating the need for expanding and dithering.

 

[somy]

Hi Spooky, I'm using Panasonic PT-AE3000 projector.
It seems to me that no matter output RGB or YCrCb, it will always be converted to RGB first inside the graphics card. The luma expansion and chroma upscale are both carried out when during this stage, and this causes low PQ IMO.
I actually set pixel forma to RGB to avoid another convertion from RGB to YCrCb.