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more detail on x264's subq 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14435 b3059339-0415-0410-9bf9-f77b7e298cf2
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lorenm 2005-01-09 01:28:49 +00:00
parent 8ee78e87ce
commit 2ff704de37
1 changed files with 21 additions and 6 deletions
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DOCS/man/en/mplayer.1
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@ -7320,18 +7320,33 @@ small moving objects are better represented by smaller blocks.
Adjust subpel refinement quality.
This parameter controls quality versus speed tradeoffs involved in the motion
estimation decision process.
It can improve quality significantly.
subq=5 can compress up to 10% better than subq=1.
.RSs
1: fullpixel mode decision, 1 iteration of qpel on the winner (fastest)
1: Runs fullpixel precision motion estimation on all candidate
macroblock types.
Then selects the best type.
Then refines the motion of that type to fast quarterpixel precision.
(fastest)
.br
2: fullpixel mode decision, 2 iterations of qpel on the winner
2: As 1, but uses a slightly slower fullpixel search and a slightly slower
quarterpixel refinement.
.br
3: halfpel mode decision, qpel on the winner
3: Runs halfpixel precision motion estimation on all candidate macroblock
types.
Then selects the best type.
Then refines the motion of that type to quarterpixel precision.
.br
4: qpel mode decision
4: Runs fast quarterpixel precision motion estimation on all candidate
macroblock types.
Then selects the best type.
Then finishes the quarterpixel refinement for that type.
.br
5: qpel mode decision, more iterations (best, default)
5: Runs best quality quarterpixel precision motion estimation on all
candidate macroblock types, before selecting the best type.
(best, default)
.REss
In the above, "all candidates" doesn't exactly mean all enabled types:
4x4, 4x8, 8x4 are tried only if 8x8 is better than 16x16.
.
.TP
.B log=<-1\-3>