[FFmpeg-devel] AVWriter again (was: v2 1/2] avformat/url: check double dot is not to parent directory)

[Nicolas George]

zhilizhao (12020-07-28):
> I think jb is referring to
> 
>      FILE *open_memstream(char **bufp, size_t *sizep);
> https://linux.die.net/man/3/open_memstream <https://linux.die.net/man/3/open_memstream>
> 
> VLC has a wrapper for it:
> 
> https://code.videolan.org/videolan/vlc/-/blob/master/include/vlc_memstream.h <https://code.videolan.org/videolan/vlc/-/blob/master/include/vlc_memstream.h>

Oh. Thanks. I had not realized such an useful function had been
standardized.

That means the argument about it being in lavf is wotrhless. But these
two arguments:

> > - avio_open_dyn_buf() always uses dynamic allocation. AVWriter starts
> >  entirely on the stack (or whatever we want), and only resorts to
> >  dynamic allocation if the buffer becomes too large. As a corollary,
> >  avio_open_dyn_buf() requires an error check at the beginning, which
> >  AVWriter does not.
> > 
> > - AVWriter is polymorphic. I have shown only av_dynbuf_writer(), but
> >  there are others, and applications can implement their own. That is
> >  the key to the "wonderful features" I have evoked. I would be happy to
> >  tell more about them.

apply to open_memstream() too.

Please ask me about the wonderful features ;)

Regards,

-- 
  Nicolas George
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