[Ffmpeg-devel] [PATCH] configure.c: CONFIG_ENCODERS

[François Revol]

> Rich Felker <dalias at aerifal.cx> writes:
> 
> > On Sat, May 07, 2005 at 09:32:20PM +0200, Roine Gustafsson wrote:
> >> 
> >> On May 7, 2005, at 8:19 PM, M?ns Rullg?rd wrote:
> >> 
> >> >Roine Gustafsson <roine at users.sourceforge.net> writes:
> >> >
> >> >>Patch sets CONFIG_ENCODERS and CONFIG_DECODERS depending on 
> > > > > wether the
> >> >>user has added any encoders or decoders.
> >> >>The idea is to use CONFIG_[EN|DE]CODERS for libavformat and use
> >> >>CONFIG_<x>_[EN|DE]CODER for libavcodec.
> >> >>Then libavformat would have no 'encoders' (muxers) if libavcodec 
> > > > > has
> >> >>no encoders at all.
> >> >
> >> >You might still want the ability to mux streams from other 
> > > > encoders,
> >> >or copied from the input.
> >> 
> >> You might have misunderstood: If there are ANY decoders, it will 
> > > enable 
> >> ALL demuxers, and similar for encoders.
> >
> > Yes, this is wrong. There's no reason you need decoders to use
> > demuxers, and no reason you need encoders to use muxers.
> 
> The requirement of decoders for demuxers is a design flaw in
> libavformat.  Fixing it now will not be easy.
> 

The requirement of containers to parse encoded data to retrieve basic 
infos such as frame rate is a design flaw in those containers (see NSV 
and many others). Do you plan on fixing the file format themselves too 
?

Fran?ois.