I recently updated my laptop (Haswell i7 w/ i4600) to 14.04 and I was happy to get VA-API decoding working for 1080 h264. When playing back such files, CPU usage has reduced from ~10% (or 37% under 12.04!) to ~1%.
The logical next step is to hopefully get VA-API accelerated h/x264 encoding working. A bit of searching says I should be able to use libav and/or Transmageddon (in combo with libgstreamer-vaapi) to achieve VA-API accelerated x264 encoding. Are those the only options? Is there any difference in the (perceived) picture quality or encoding speed between them?
The Transmageddon in the 14.04 repos is rather out-of-date so I suspect I'd need to update to a newer version to get VA-API working? Would I also need to create a custom profile to enable VA-API?
Has anyone got a working libav command to encode x264 w/ VA-API?
What support do KDEnlive and Lightworks offer for VA-API?
How does VA-API encoding compare to Quick Sync these days? Last I heard it was running at a fraction (less than 1/5th) of the speed.
Finally, what is the max res. / bitrate of h264 I could encode in hardware with my i4600 GPU?
Thank you, Intel encoding overlords!
The logical next step is to hopefully get VA-API accelerated h/x264 encoding working. A bit of searching says I should be able to use libav and/or Transmageddon (in combo with libgstreamer-vaapi) to achieve VA-API accelerated x264 encoding. Are those the only options? Is there any difference in the (perceived) picture quality or encoding speed between them?
The Transmageddon in the 14.04 repos is rather out-of-date so I suspect I'd need to update to a newer version to get VA-API working? Would I also need to create a custom profile to enable VA-API?
Has anyone got a working libav command to encode x264 w/ VA-API?
What support do KDEnlive and Lightworks offer for VA-API?
How does VA-API encoding compare to Quick Sync these days? Last I heard it was running at a fraction (less than 1/5th) of the speed.
Finally, what is the max res. / bitrate of h264 I could encode in hardware with my i4600 GPU?
Thank you, Intel encoding overlords!
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