[Libva] (H264) Reference Picture selection

[Zhao Yakui]

On Wed, 2014-05-07 at 12:32 -0600, Torbjorn Tyridal wrote:
> Hi, 
> 
> 
> Is it possible to select which reference frames to consider when
> encoding a frame with libva (Intel, haswell)?
> 

The upper user-space application will pass the reference picture list0/1
for H264 encoding and then the libva driver will use the info for the
reference frame in encoding.

> 
> I have a scheme where the decoder ack's received frames -  With this
> information I could resync without an IDR by carefully selecting the
> reference frame(s). 

Will you please describe your idea in detail?

> 
> 
> long term references would typically be employed as well, but it seems
> ref-pic-marking was removed may'13?
> 

Why do you hope to use the long-term reference? As you know, the current
encoding is based on hardware-acceleration. When more the reference
frames can be selected, the driver will be more complex and then the
encoding speed is also affected.

> 
> -- 
> T.