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Diffstat (limited to 'DOCS/tech/libavc-options.txt')
| -rw-r--r-- | DOCS/tech/libavc-options.txt | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/DOCS/tech/libavc-options.txt b/DOCS/tech/libavc-options.txt index 62e8bcf839..2264e99fe3 100644 --- a/DOCS/tech/libavc-options.txt +++ b/DOCS/tech/libavc-options.txt @@ -284,6 +284,42 @@ subcmp comparission function for sub pel motion estimation 7 ZERO (0) +256 (use chroma too, doesnt work with b frames currently) Tip: SAD is fast, SATD is good + Tip2: when using SATD for full pel search u should use a larger diamond + something like dia=2 or dia=4 + +dia (-99 - 6) diamond type & size for motion estimation + ... + -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 + 0 + 000 + 0 + 2 normal size=2 diamond + 0 + 000 + 00000 + 000 + 0 + ... + 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 + +trell trellis quantization + this will find the optimal encoding for each 8x8 block + trellis quantization is quite simple a optimal quantization in the + PSNR vs bitrate sense (assuming that there would be no rounding errors introduced + by the IDCT, which is obviously not the case) it simply finds a block for the minimum of + error + lambda*bits + lambda is a qp dependant constant + bits is the amount of bits needed to encode the block + error is simple the sum of squared errors of the quantization + +last_pred (0-99) 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 lavdopts: (decoder options) --------------------------- |