[MPlayer-users] codec default options

[Corey Hickey]

Steven Miller wrote:
> when reading the man page and you see that an option
> is (default), such as 
> 
> (no)trellis 
>  Trellis Quantization is a kind of adaptive
> quantization method that saves bits by modifying
> quantized coefficients to make them more compressible
> by the entropy encoder. Its impact on quality is good,
> and if VHQ uses too much CPU for you, this setting can
> be a good alternative to save a few bits (and gain
> quality at fixed bitrate) at a lesser cost than with
> VHQ (default: on). 
> 
>  do you have to specify the option on the command line
> in order to kick it on, and at that point it uses the
> default value? Or is it already going on under the
> hood without having to specify it? Odd question, but
> there you have it!

The latter; with XviD, trellis is enabled by default. Specifying 
"trellis" will change nothing, and specifying "notrellis" will disable 
trellis.

The same holds true for other options that are similarly worded. If you 
find a case that doesn't, report it as a bug.

-Corey