[FFmpeg-devel] [PATCH] Update trellis option usage in FAQ

Jethro Walters turkeyman121
Sat Nov 15 15:05:40 CET 2008

--- On Sat, 15/11/08, Michael Niedermayer <michaelni at gmx.at> wrote:

> From: Michael Niedermayer <michaelni at gmx.at>
> Subject: Re: [FFmpeg-devel] [PATCH] Update trellis option usage in FAQ
> To: "FFmpeg development discussions and patches" <ffmpeg-devel at mplayerhq.hu>
> Date: Saturday, 15 November, 2008, 12:05 PM
> > > On Sat, Nov 15, 2008 at 12:43:59PM +0100, Stefano Sabatini wrote:
> > Hi,
> > 
> > since lavc 52 trell isn't anymore a valid flag, patch changes -flags
> > +trell with -trellis 2.
> hmm, it seems we are missing a description of what 0/1/2 is
> in avcodec.h and the AVOptions in utils.c

Perhaps taking them from x264 CLI's long-help description would be appropriate. From memory it's something like the following (don't have x264 to hand at the moment, where's Dark Shikari when ya need him? ;-)):

0 - No trellis performed
1 - Perform trellis on final macroblock encode only
2 - Perform trellis on all encodes

But that's just from memory, and is possibly a little inaccurate, and out-dated since x264 / Dark Shikari made changes to what trellis specifically did.

Jethro Walters


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