[Bug 763433] Failed to encode a 480p stream in raw I420 format into H.264

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=763433

--- Comment #4 from jack <crogerjack at gmail.com> ---
I'm not sure whether the driver binary is free to download or not. I only do
sudo apt-get install gstreamer1.0-vaapi libva-intel-vaapi-driver to get the
required gstreamer vaapi plugins. 

So far I only done the testing on encoding scenario. I will do other testing
once I have free time.

I was testing this pipeline on 
--Lenovo laptop (Intel i7 with AMD Radeon graphics)
--Ubuntu 14.04
--Gstreamer 1.2.4

I also tried to use Intel Atom with Ubuntu 14.04 and I found that command
vainfo will try to open iHD_drv_video.so while the gstreamer pipeline will try
to open /usr/lib/x86_64-linux-gnu/dri/i915_drv_video.so. Anyway, the gstreamer
pipeline failed to open i915_drv_video.so due to no dri file in
/usr/lib/x86_64-linux-gnu directory. I found the i915_drv_video.so is located
at another directory so I use command mkdir to create dri in
/usr/lib/x86_64-linux-gnu and then link the i915_drv_video.so to
/usr/lib/x86_64-linux-gnu/dri. After I run the gstreamer pipeline, the log info
show Segmentation fault (core dumped).

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