Hey, thanks for the PR, for some reason I unwatched this repo at some point and as a result was never notified. I'll hopefully try this very soon and merge it if it works for me.
See the list of available options at https://ffmpeg.org/ffmpeg-all.html#rtsp. As the docs point out, the options can be passed into `avformat_open_input`, which corresponds to [`ffmpeg_next::format::open_with`](https://docs.rs/ffmpeg-next/4.3.3/ffmpeg_next/format/fn.open_with.html) (see `options` argument). I don't know if there are specific options suiting your needs because I don't do rtsp. That's firmly in FFmpeg land and isn't something this library can influence.
I do need to be clear though, this is an issue tracker, not a Q&A forum, and I don't have a lot of time for this project to begin with, so in the future I'll probably just close generic questions like this without answer. Better resources:
- FFmpeg user-facing docs: https://ffmpeg.org/ffmpeg-all.html
- FFmpeg Doxygen: <s>https://ffmpeg.org/doxygen/4.1/index.html a bit outdated for whatever reason, but fine for most purposes</s> I forgot there's a trunk version: https://ffmpeg.org/doxygen/trunk/index.html;
- https://docs.rs/ffmpeg-next/ Not well-documented, I know, but I don't have the time for documentation improvement.
And StackOverflow.