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psnr 

more vstrict info
another mpeg intro link


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8878 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2003-01-10 21:10:32 +00:00
parent 3f4df9f674
commit 54cabad0f6
1 changed files with 12 additions and 3 deletions
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15
DOCS/tech/libavc-options.txt
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@ -188,9 +188,12 @@ vcelim (-1000-1000) single coefficient elimination threshold for chrominance
negative values will allso consider the dc coefficient negative values will allso consider the dc coefficient
should be at least -4 or lower for encoding at quant=1 should be at least -4 or lower for encoding at quant=1
vstrict strict standard compliance vstrict (-1,0,1) strict standard compliance
only recommended if you want to feed the output into the mpeg4 reference 0 (default)
decoder 1 only recommended if you want to feed the output into the mpeg4 reference
decoder
-1 allows nonstandard YV12 huffyuv encoding (20% smaller files, but
cant be played back by the official huffyuv codec)
vdpart data partitioning vdpart data partitioning
adds 2 byte per video packet adds 2 byte per video packet
@ -333,6 +336,10 @@ preme (0-2) Motion estimation pre-pass
subq (1-8) subpel refinement quality (for qpel) subq (1-8) subpel refinement quality (for qpel)
8 (default) 8 (default)
Note: this has a significant effect on the speed Note: this has a significant effect on the speed
psnr will print the psnr for the whole video after encoding and store the per frame psnr
in a file with name like "psnr_012345.log"
lavdopts: (decoder options) lavdopts: (decoder options)
--------------------------- ---------------------------
@ -389,6 +396,7 @@ DCT Discrete Cosine Transform
IDCT Inverse Discrete Cosine Transform IDCT Inverse Discrete Cosine Transform
DC The coefficient of the constant term in the DCT (avg value of block) DC The coefficient of the constant term in the DCT (avg value of block)
JVT Joint Video Team Standard -- http://www.itu.int/ITU-T/news/jvtpro.html JVT Joint Video Team Standard -- http://www.itu.int/ITU-T/news/jvtpro.html
PSNR peak signal to noise ratio
Examples: Examples:
mencoder foobar.avi -lavcopts vcodec=mpeg4:vhq:keyint=300:vqscale=2 -o new-foobar.avi mencoder foobar.avi -lavcopts vcodec=mpeg4:vhq:keyint=300:vqscale=2 -o new-foobar.avi
@ -399,6 +407,7 @@ short intro to mpeg coding:
http://www.eecs.umich.edu/~amarathe/mpeg.html http://www.eecs.umich.edu/~amarathe/mpeg.html
longer intro to jpeg/mpeg coding: longer intro to jpeg/mpeg coding:
http://www.cs.sfu.ca/undergrad/CourseMaterials/CMPT479/material/notes/Chap4/Chap4.2/Chap4.2.html http://www.cs.sfu.ca/undergrad/CourseMaterials/CMPT479/material/notes/Chap4/Chap4.2/Chap4.2.html
ftp://ftp.tek.com/mbd/manuals/video_audio/25W_11418_4.pdf
-- --
Written 2002 by Michael Niedermayer and reviewed by Felix Buenemann. Written 2002 by Michael Niedermayer and reviewed by Felix Buenemann.