来自德国海德堡大学的 x264 opencl 加速演示版（源代码）

Edison

Considering the fact that only a fraction of the motion estimation capabilities have been ported to OpenCL, the OpenCL powered encoding is up to 55% faster than the original Full Search based encoding of the unmodified x264. While other GPU solutions claim up to 20x speedup, independent tests against unmodified x264 shows similar gains as our implementation for FullHD. Furthermore, the current work is the first open-source, working integration into the x264 encoder that enables it to profit from the computing power of high performance graphics devices.

http://li5.ziti.uni-heidelberg.de/x264gpu/x264demo.zip

This demo includes the full source code in OpenCL, plus some scripts to fetch images from "Big Buck Bunny" and encode them using x264. Please note that the download of the source images might take a long time and take some serious space in your hard drive (~3.4G). We are working in adding the source code to the x264 development tree.

http://li5.ziti.uni-heidelberg.de/x264gpu/

我说的是事实

似乎只用在运动估算方面。不过这样谨慎点比较好。先保证画质。