Changes between Version 6 and Version 7 of Encode/VP9

Timestamp:

Jul 5, 2017, 5:45:41 PM (9 years ago)

Author:

slhck

Comment:

s/reduce/increase, other minor fixes

Encode/VP9

@@ -91 +91 @@
 - `good` is the default and recommended for most applications.
 - `best` is recommended if you have lots of time and want the best compression efficiency.
-- `realtime` is recommended for live / fast encoding. When using `realtime`, the encoder will try to hit a particular CPU utilization target, and encoding quality will depend on CPU speed and the complexity of the clip that you are encoding. See [https://www.webmproject.org/docs/encoder-parameters/ the vpx documentation] for more info.
+- `realtime` is recommended for live / fast encoding.
 
 === CPU Utilization ===
@@ -97 +97 @@
 `-cpu-used` sets how efficient the compression will be. For legacy reasons, the option is also accessible with `-speed` in ffmpeg. 
 
-When the deadline/quality parameter is `good` or `best`, values for `-cpu-used` can be set between 0 and 5. The default is 0, but using 1 or 2 will reduce encoding speed at the expense of having some impact on quality and rate control accuracy. 4 or 5 will turn off rate distortion optimization, having even more of an impact on quality. For two-pass encoding, it is recommended to set a higher speed for the first pass (e.g., 4), and a lower one for the second pass (e.g. 1). 
+When the deadline/quality parameter is `good` or `best`, values for `-cpu-used` can be set between 0 and 5. The default is 0. Using 1 or 2 will increase encoding speed at the expense of having some impact on quality and rate control accuracy. 4 or 5 will turn off rate distortion optimization, having even more of an impact on quality. For two-pass encoding, it is recommended to set a higher speed for the first pass (e.g., 4), and a lower one for the second pass (e.g. 1). 
 
-When the deadline/quality is set to `realtime`, the valid values for `-cpu-used` are between 0 and 15, where the CPU utilization target (in per cent) is calculated as `(100*(16-cpu-used)/16)%`.
+When the deadline/quality is set to `realtime`, the encoder will try to hit a particular CPU utilization target, and encoding quality will depend on CPU speed and the complexity of the clip that you are encoding. See [https://www.webmproject.org/docs/encoder-parameters/ the vpx documentation] for more info. In this case, the valid values for `-cpu-used` are between 0 and 15, where the CPU utilization target (in per cent) is calculated as `(100*(16-cpu-used)/16)%`.