hardware video encoding with gstreamer -- any recommendations?

[Florent]

>
> I have been having luck with the decklink but the only reason I am using
> it is because it does sdi.
>

If i'm not mistaken, decklink captures, doesn't encode.

Hardware accelerated encoding just isn't really possible on gstreamer
(yet), except on the embedded space (TI only, see
http://gstconf.ubicast.tv/videos/gstreamer-and-dmabuf/ for an update on
using rob's gst-ducati <https://github.com/robclark/gst-ducati>).

I believe the nearest way of doing hw encode is using Intel Sandy/Ivy
Bridge using vaapi (see https://gitorious.org/vaapi/gstreamer-vaapi), but
so far, only decoding is upstream. Encoding might come in the future though
(some protoype work already started
https://gitorious.org/vaapi/gstreamer-vaapi/merge_requests/5).

Intel seems to be the only vendor interested in integrating these
hardware-accelerated encoding features on Linux.

If you don't have space constraints, i suggest you look into
low-compression codecs (jpegenc, ffenc_mjpeg, ffenc_mpeg4) since they are
light enough for high quality capture. As for live encoding for streaming
purposes, x264enc should be okay up to 720p on modern hardware.

Florent
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