ffmpeg OpenCL,...

[Selur]

Since ffmpeg 2.0 (July release), ffmpeg has some (any one got details? *) OpenCL support.

Does anyone know a source for Windows OpenCL enabled builds ? (compiled with '--enabled-opencl')
Does anyone know what speed gains(/losses?) can be expected for which operations?

Cu Selur

* from what I remember at least deshake and unsharpen have some OpenCL optimized versions

[poisondeathray]

I wonder if it's just the OpenCL patch for libx264 ? or does it affect other operations as well ? Is there a detailed changelog somewhere?

EDIT: here is a bit of info
http://www.ffmpeg.org/ffmpeg-utils.html#OpenCL-Options

[Selur]

As far as I know the OpenCL support in ffmpeg has nothing to do with the libx264 OpenCL support.

the OpenCL-Options only allow to select a specific device, platform, opencl level

Looking at:
http://www.ffmpeg.org/ffmpeg-filters.html
at least unsharp and deshake have OpenCL flags

[poisondeathray]

OK.

Apparently it can affect some filters performance , but sometimes worse performance

http://ffmpeg.zeranoe.com/forum/viewtopic.php?f=10&t=1284

Searching around it looks like only a few filters are affected so far

[Selur]

Apparently it can affect some filters performance , but sometimes worse performance

Sure, opencl support in NVIDIA GPUs often isn't as good as for ATI GPUs and then you probably need a fast GPU to really get some benefits.

Sadly it does not seem like anyone is offering opencl enabled builds for windows.