[FFmpeg-devel] [PATCH] avformat/tee: Move to new BSF API

Nicolas George george at nsup.org
Thu May 12 11:18:58 CEST 2016

Le quartidi 24 floréal, an CCXXIV, Nicolas George a écrit :
> Le quartidi 24 floréal, an CCXXIV, Jan Sebechlebsky a écrit :
> > I can change it to array, the advantage of using linked list was that number
> > of bitstream
> > filters used is not known before arguments are parsed, this way the filters
> > were initialized and as the the filters were parsed. With array the argument
> > will be parsed twice - first pass just to count and allocate the array,
> > second to initialize the filters. But it's not big deal to do it that way.
> There are several instances of similar code, the array is often reallocated.
> We have macros to reallocate an array with double size efficiently. But a
> quick pre-parsing to count the number of filters is also a legitimate idea.
> > Should I wait with this patch until your changes are pushed?
> You can apply it on a branch of your working tree to continue your task.
> > Can you explain this little bit more?
> Recursive filtering is annoying to debug (lots of nested stack frames, hard
> to put break points) and does not play well with threads.
> >					Should I rewrite it it non-recursive
> > way (process packets with first filter, accumulare resulting packets,
> > process with next one and so on)?
> The code in avconv.c has a nice way of dealing with the issue, I encourage
> to look at it.
> We briefly had an API to apply several bitstream filters sequentially, until
> it was NIHed by the fork. I would support re-adding one.

I had not noticed you replied in private. Please remember to keep the
mailing-list in copy, and then no need to send to me directly since I am no
the list.


  Nicolas George
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