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| author | michael <michael@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2003-01-10 21:10:32 +0000 |
|---|---|---|
| committer | michael <michael@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2003-01-10 21:10:32 +0000 |
| commit | 54cabad0f68f5a3fc73b2ba06575a1934938377d (patch) | |
| tree | 3032d6cd0fe602becacbe800053593d3a5869053 /DOCS | |
| parent | 3f4df9f6747d22454ca709c3807a4dbcd8b94bdb (diff) | |
| download | mpv-54cabad0f68f5a3fc73b2ba06575a1934938377d.tar.bz2 mpv-54cabad0f68f5a3fc73b2ba06575a1934938377d.tar.xz | |
psnr
more vstrict info
another mpeg intro link
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8878 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'DOCS')
| -rw-r--r-- | DOCS/tech/libavc-options.txt | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/DOCS/tech/libavc-options.txt b/DOCS/tech/libavc-options.txt index f53ded2f30..a5e1309169 100644 --- a/DOCS/tech/libavc-options.txt +++ b/DOCS/tech/libavc-options.txt @@ -188,9 +188,12 @@ vcelim (-1000-1000) single coefficient elimination threshold for chrominance negative values will allso consider the dc coefficient should be at least -4 or lower for encoding at quant=1 -vstrict strict standard compliance - only recommended if you want to feed the output into the mpeg4 reference - decoder +vstrict (-1,0,1) strict standard compliance + 0 (default) + 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 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) 8 (default) 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) --------------------------- @@ -389,6 +396,7 @@ DCT Discrete Cosine Transform IDCT Inverse Discrete Cosine Transform 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 +PSNR peak signal to noise ratio Examples: 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 longer intro to jpeg/mpeg coding: 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. |