[Libva] Encode from texture source?

[Chris Healy]

Gwenole, Pawel,

If you can find that ancient code, I would be interested in seeing it.  I
need to encode to H.264 the output of an OpenGL application for network
streaming on a headless Ivy Bridge platform.

Regards,

Chris


On Wed, Jul 31, 2013 at 8:37 PM, Gwenole Beauchesne <gb.devel at gmail.com>wrote:

> Hi Pawel,
>
> 2013/8/1 Pawel Osciak <posciak at chromium.org>:
>
> > Is there any way to do a zero-copy encode/video processing from a texture
> > source? This would I guess involve turning a texture/X drawable into a
> > VASurface? I think Gwenole mentioned some extensions he's been working on
> > back in April 2012, but I haven't found any of this in the code or
> > examples...
>
> The Intel driver supports GEM buffer and DMA buffer imports. So, if
> you can expose a GEM buffer, or a dma_buf from a texture, then you can
> create a VA surface from it. Then, you can use VA/VPP to convert to
> NV12 tiled, and kick encoding from it. This is what we do for Weston
> to encode from the EGLSurface for example.
>
> I could dig some ancient code at the office if you want, with no
> guarantee it still works. :)
>
> Note: the recommended way to encode will be through some middleware
> (libgstvaapi, OMX, Media SDK), unless you really want to spend some
> time on tuning the encoding process with libva.
>
> Regards,
> Gwenole.
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