[Libva] (H264) Reference Picture selection

[Torbjorn tyridal]

Hi,

>> 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.

It's for implementing Cisco's clearpath technology
(http://www.cisco.com/c/dam/en/us/td/docs/telepresence/endpoint/software/clearpath/clearpath_whitepaper.pdf)
Basically one would  periodically mark a P frame as long term reference,
in case of packet loss one can thus refer to this one instead of
restarting the stream with an idr.


I'm not too concerned about the encoding speed as long as it's above
realtime (60fps 1920x1080)


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 181 bytes
Desc: OpenPGP digital signature
URL: <http://lists.freedesktop.org/archives/libva/attachments/20140509/ea3cb799/attachment.sig>