[FFmpeg-devel] avcodec_check_frame_for_corruption?

Michael Niedermayer michaelni
Wed Mar 26 17:42:39 CET 2008

On Wed, Mar 26, 2008 at 02:28:36PM +0100, Benjamin Larsson wrote:
> madshi wrote:
> >  From reading the mailing list it appears to me that
> > you ffmpeg/libav devs are quite strict with checking
> > for possible error conditions etc. I like that a lot!
> > Now I'm wondering:
> >
> > Is there any chance to add functionality to libav to
> > make it possible for me as a programmer who uses
> > libav to check a video or audio frame for corruption?
> >
> > My understanding is that currently all decoders try
> > to work around corruption and still let decoding
> > succeed somehow. E.g. the MPEG2 decoders still
> > output frames even if the bitstream is damaged.
> > The problem with that for me is that I cannot
> > detect whether an audio or video frame was clean
> > or corrupt. And that is what I'd like to find out.
> >
> > Maybe the video/audio decoders could set a flag
> > somewhere when a frame was found to be damaged,
> > but when decoding still worked fine? Another option
> > would be if I could tell the decoders to let decoding
> > fail if there's any corruption found in the bitstream.
> >
> > What do you think?
> >
> > Regards, madshi.
> This sounds like a good feature. A simple approach would be to just add 
> another avctx member and check it before and after calling decode().

AVFrame member, or this will be a nightmare with B frame reordering.


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Thouse who are best at talking, realize last or never when they are wrong.
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