[FFmpeg-devel] [PATCH] lavf/tee: add support for bitstream filtering

Nicolas George nicolas.george at normalesup.org
Thu Jul 18 14:47:19 CEST 2013

Le decadi 30 messidor, an CCXXI, Stefano Sabatini a écrit :
> What do you suggest instead? fctx? I personally hate the confusion
> between object/object context, but not that I mind so much (especially
> if the code is authored by someone else than me).

Since contexts are used much more widely, I believe they should get the
shorter name, especially when there is absolutely no risk of confusion.

In this particular case, "mux" or "muxer" seems a nice name for the
AVFormatContext, and "filters" maybe for the bitstream filters.

> Yes, but...
> this leads to the namespace problem which was never properly handled,
> if we had a bsf option to any muxer then it will shadow the option.

I am still not convinced this issue is really a problem, options are few, it
is easy to be careful.

But you can just use the name "tee.bsf", since the dot was precisely
reserved for that use.

> My idea was indeed:
> dump_extra:v=args
> Since we currently don't support bsf options in ffmpeg, I didn't
> bother to support them here.

That is right. In fact, I was convinced that av_bitstream_filter_init()
would split the name at the equal sign, but I was wrong. But the other
arguments to use the existing options system still stand.

> Sure, I'm aware of the problem. On the other hand I need a solution in
> the short term, and under these conditions I prefer the proverbial egg
> today rather than a chicken tomorrow, especially considering that a
> proper design/discussion/implementation would probably require
> weeks/months rather than days.

Of course, that is why I do not object to the patch.

> You're welcome to share your thougths about the lavfi data path.

Will do.


  Nicolas George
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