OpenCL lookahead

Signed-off-by: Steve Borho <steve@borho.org>
Film Grain Optimization

Signed-off-by: Dark Shikari <darkshikari@gmail.com>
Simplified the long parameters
Detect color matrix with lavf/ffms demuxer

Signed-off-by: Jan E <jeebjp@gmail.com>
lto & Ofast

Signed-off-by: Yasuhiro Ikeda <wipple625@gmail.com>
K-means weightp

Signed-off-by: Pietje Bell <pietjebell@pietjebell.org>
Fix "OpenCL" Configure and help