[Ffmpeg-devel] Closing all GOPs.

[Michael Niedermayer]

Hi

On Saturday 16 July 2005 20:10, Guillaume POIRIER wrote:
> Hi,
>
> On 7/16/05, M?ns Rullg?rd <mru at inprovide.com> wrote:
> > Julio C?sar Carrascal said:
> > > Hi. I'm trying to create a compliant video for a DVD with mencoder.
> > > Right now most DVD creation programs (Nero Vision, Sony DVD Architect
> > > and DVD-Lab PRO) complaint because the GOPs aren't closed in the file
> > > and try to re-encode it. I asked in the mencoder-users list and they
> > > thold me that the feature wasn't implemented and I should ask here.
> > >
> > > My question would be: Is "cgop" going to be implemented any time soon?
> > > If so, any idea when will a release be available?
> >
> > It's been there for a year or so, at least.  IIRC, CODEC_FLAG_CLOSED_GOP
> > or something similar is the internal name.  I'm sure someone else can
> > tell you how to have mencoder use it.
>
> It should be already implemented in MEncoder. ve_lavc.c:612 has this:
>
> #ifdef CODEC_FLAG_CLOSED_GOP
>     lavc_venc_context->flags|= lavc_param_closed_gop;
> #endif
>
> What I'm not too sure though is if CODEC_FLAG_CLOSED_GOP is always
> defined so this part of the code get compiled or not. MPlayer's doc
> says that closed GOP is not implemented yet.

the docs are wrong, cgop does work as long as scene change detection is 
disabled (-sc_threshold 1000000000 for example will do that in ffmpeg)

[...]

-- 
Michael