Expose Bitstream Filter functionality

[tobyspark]

Feature request – expose Bitstream Filter functionality, e.g. bsf.c. This allows modification of AVPackets, to e.g. set H264 metadata.

ps. This is a heroic project. Thanks for all the work that must have gone into it.

pps. If I have missed something, or you can give me some hints on what I’d need to do to enable this myself as a contribution, please let me know.

[Ruslan-B]

Thank you. It will be a part of new API witch will break thing or two #217
Need a time to finalize. Will push new update in few days.
With respect to contribution PR's are welcome it easy to setup VS 2022 but I am conservative to accept them as there are reasons.
This repo and package is bare bone - C to C#.

[tobyspark]

Thanks for the reply. The “bare bones C to C#” is what attracted me! (Though that’s also the surprise behind this request, as I couldn’t recreate a C example.)

[Ruslan-B]

Could you please specify what types you are missing now as I started to look and seems everything is included starting from 4.4 I think.

[Ruslan-B]

If it is in bsf_internal.h - then it is not a part official API.

[tobyspark]

I don’t think it’s private, as bsf.h doesn’t have “internal” or “avpriv” or any of the other markers I’ve seen.

That said, a) generally I find the FFmpeg codebase and how to use it quite confusing so shrug and b) I no longer need this, in no small part because I’ve realised some of the metadata I wanted to set was already there, just most PC browsers seem to ignore it.

I’ll close this now as I suspect both of us have more important things to do, and anyone who was in my position will at least find this issue. Thank you again for your efforts.

[Ruslan-B]

@tobyspark submit bug to FFmpeg then. Right now you can port some structs by hand or generate private version of this repo with extras includes.