[yocto] libva failing for mp4 using gstreamer under 'danny' with cedartrail BSP

[Ross Burton]

On Thursday, 13 December 2012 at 22:22, Chris Tapp wrote:
> Good catch. This shows there is no video/x-surface decoder available. Off to find which plugin I need...
>  
> I should have thought of trying that. Thanks! I'll have to find out why my gstreamer error handler isn't spotting the problem!
Yeah… that's a bug I meant to fix in danny-next but failed.  Install gst-plugins-xvimagesink (or something like that, not at my work machines right now).

> > It's possible that you've got some horrible GLES/VA interaction, specifically the download from VA-land to however you're getting the video into the textures. Speaking of which, how are you getting from frames to textures?
> I'm using appsink to give me access to the raw pixel data which I then glTexSubImage into a texture. I'm using appsink as I've got legacy code that uses it for an SDL app. I may try and switch to gstreamer GL plugin support when I find the best option ;-)

There'll be a better way - gstreamer-gl is worth a look at if you can assume VAAPI you should be able to construct a fairly efficient vaapi-gl pipeline (with gstreamer 1.0 I believe you'll be able to get zero-copy)

Ross