[FFmpeg-devel] [PATCH] mpeg4videodec: silence "Invalid andinefficient vfw-avi packed B frames detected" warning

[Reimar Döffinger]

On Mon, Sep 09, 2013 at 09:22:07PM +0200, Reimar Döffinger wrote:
> On Sun, Sep 08, 2013 at 08:31:52PM -0400, Don Moir wrote:
> > >On Tue, Sep 03, 2013 at 04:35:35PM -0400, Don Moir wrote:
> > >>>Though for some reason this yet again seems to have degenerated into
> > >>>an IMO fairly pointless back and forth, with no attention
> > >>>or comments that would allow me to understand the issue and where I
> > >>>might have misunderstood the problem on the two suggestions I had
> > >>
> > >>Yes exactly. All I said was I would compile out the warnings if
> > >>good... just a switch mind you.. just a comment and not to generate
> > >>endless BS
> > >>
> > >>I expect the name calling to happen next :)
> > 
> > >>But since it's not something that could be done trivially with a
> > >>macro or so I'm not sure it's worth it, but it's interesting to
> > >>consider.
> > 
> > >Possibly not to trivial not sure. One thing is the fatals would have to be separated.
> > 
> > This seems to work for me but have not tried with GCC.
> > 
> > in log.h
> > 
> > #ifdef _NOWARNINGS
> >    inline void av_log(void *avc1, int level, const char *fmt,...){}
> > #else
> >    void av_log(void *avc1, int level, const char *fmt,...);
> > #endif
> > 
> > in log.c av_log (...) would need #ifdef
> > 
> > fatals still need to be separate
> 
> Yes, that's exactly where the problem lies.
> So you have to filter out those you do not want.
> And then it still needs to be more efficient than the function call.
> Then you have to be careful not to mess too much with the public
> headers.
> However it seems like the below would work, it would just needs
> someone to add properly to configure.
> It does cause the binary tools to act really weird though, for example
> it causes "ffprobe -h" to print a bit of help and then a huge number
> of empty lines...

Btw. this reduces size of the stripped ffmpeg binary by about 238kB or
almost 2.5%.