[FFmpeg-devel] [PATCH] doc/bsfs: various improvements

Lou Logan lou at lrcd.com
Thu Nov 17 22:03:08 EET 2016

On Wed, 16 Nov 2016 00:11:50 +0100, Moritz Barsnick wrote:

> I couldn't wrap my head around some of the filters. Sometimes, no other
> mention is even found on the web (incl. mailing lists) except for e.g.
> quotes of the sources. (I did try to reverse-engineer the sources
> carefully.) I reckoned some doc is better than no doc.

Yeah, although I made the ticket and assigned it to myself what you
point out is basically why I never finished it.

> E.g. I couldn't figure out whether all filters are "still" useful, or
> whether documenting them may confuse someone. Was the MP3 header
> compression, as once created by a now-removed bitstream filter,
> proprietary to ffmpeg? Was it found in the wild?

Yes, there was once a bsf that would compress the header. Removed in
75ec40b/c6080d8. I don't know if it was anything used in the wild or
just something from FFmpeg. Michael was the author so he'll know more.

> What is the movsub filter pair actually useful for?

Good question. I looked into it once but forgot all details.

Anyway, thanks for the patch. It has been pushed. 

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