[Libva] Quality of the scaled H264 decoded image

[Ratin]

I am using Intel_driver from the staging branch, on a Gen 3 HD4000. So
there other algorithms like bi-cubic is not supported?


On Mon, Feb 18, 2013 at 12:11 AM, Xiang, Haihao <haihao.xiang at intel.com>wrote:

> On Fri, 2013-02-15 at 16:18 -0800, Ratin wrote:
> > I am decoding a 720 P video stream from a camera to 1080 P surfaces
> > and displaying them on the screen. I am seeing noticable noise and
> > pulsating which is directly related to the I frame interval
> > (aparently), the lowest I-frame interval I can specify for the camera
> > is  1 second and selecting that in addition to bitrate of 8192 kbps
> > makes is slightly better but still a lot of noise. A software
> > decoded/scaled video looks all smooth.
> >
> >
> > What I am wondering is what's the default scaling algorithm being used
> > in vaapi/intel driver and how do I specify better scaling algorithms
> > like bi-cubic etc.and possibly specify the strength of deblocking
> > filter level as well, and what can I do to reduce the pulsating ?
>
> Which driver are you using ? For Intel, it is bilinear.
>
> >
> >
> >
> >
> > Any input would be much appreciated.
> >
> >
> > Thanks
> >
> >
> > Ratin
> >
> >
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>
>
>
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