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-rw-r--r--DOCS/tech/snow.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/DOCS/tech/snow.txt b/DOCS/tech/snow.txt
index 2b6628d596..9293d37bde 100644
--- a/DOCS/tech/snow.txt
+++ b/DOCS/tech/snow.txt
@@ -20,6 +20,15 @@ OPTIONS RECOGNIZED BY SNOW
Note that 0 may not be specified; if you want lossless encoding, you
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
Set the comparison function, default: 0 (SAD).
useful values = 0 (SAD), 1 (SSD), 11 (5/3 wavelet), 12 (9/7 wavelet).