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Snow 1.55 (and up) allows 2pass ratecontrol. 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@15190 b3059339-0415-0410-9bf9-f77b7e298cf2
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gpoirier 2005-04-16 16:16:28 +00:00
parent cf8a94fbe7
commit da47cc3068
1 changed files with 9 additions and 0 deletions
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DOCS/tech/snow.txt
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@ -20,6 +20,15 @@ OPTIONS RECOGNIZED BY SNOW
Note that 0 may not be specified; if you want lossless encoding, you Note that 0 may not be specified; if you want lossless encoding, you
must leave out vqscale. must leave out vqscale.
* vpass=<1|2>
Activates internal two pass mode.
* vbitrate=<value>
Specify bitrate of the 2nd pass.
Don't use it for 1st pass as CBR isn't implemented yet, use vqscale
instead, and set it to a quantizer near to the target average quant
of the final encode.
* cmp, subcmp, mbcmp * cmp, subcmp, mbcmp
Set the comparison function, default: 0 (SAD). Set the comparison function, default: 0 (SAD).
useful values = 0 (SAD), 1 (SSD), 11 (5/3 wavelet), 12 (9/7 wavelet). useful values = 0 (SAD), 1 (SSD), 11 (5/3 wavelet), 12 (9/7 wavelet).