Motion estimation

Comparison functions:

• SAD - sum of absolute differences (default)
• SSE  -sum of squared errors
• SATD - sum of absolute hadamard transformed differences
• DCT - sum of absolute dct transformed differences
• PSNR - sum of the squared quantization errors
• ZERO

Warning: chroma doesn't work with b frames currently

Tip: SAD is fast, SATD is good

Tip2: when using SATD for full pel search you should use a larger diamond something like dia=2 or dia=4

EPZS diamond sizes:

• -3 shape adaptive diamond with size 3
• -2 shape adaptive diamond with size 2
• -1 experimental
• 1 normal size=1 diamond (default) =EPZS type diamond
• 2 normal size=2 diamond
• ...

Tip: the shape adaptive stuff seems to be faster at the same quality

Note: the sizes of the normal diamonds and shape adaptive ones dont have the same meaning

Last predictor count:

Amount of motion predictors from the previous frame

• 0 (default)
• a -> will use 2a+1 x 2a+1 MB square of MV predictors from the previous frame, a should be <99