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

[Jason Garrett-Glaser]

On Sat, Nov 15, 2008 at 6:05 AM, Jethro Walters
<turkeyman121 at yahoo.co.uk> wrote:
> --- 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

Nope, trellis is the same as it always was.  "Psy trellis" was added
as an option, but like AQ and psy-RD, its not accessible through lavc
because nobody has added a commandline option for it in ffmpeg.

Dark Shikari