Unrecognized option 'rtsp_transport'

[AndyHsuTW]

Is the argument 'rtsp_transport' not supported here? The same arguments works on standard ffmpeg but not in ffmpeg.js.
https://ffmpeg.org/ffmpeg-protocols.html#rtsp

Here are what i am used and it will show Unrecognized option 'rtsp_transport' on printError.

arguments: ["-rtsp_transport", "tcp", "-i", "rtsp://ownaddress/live.sdp", '-f', 'mpeg1video', '-b:v', '800k', '-r', '30', '-']

ffmpeg version n3.1.2

[Kagami]

Yes, rtsp support is not enabled at compile time so not available. And I'm not sure it wil even work in browser, because there's no access to the TCP sockets.

[Kagami]

Sockets may work via websockify proxying though, there seems to be some poorly documented support, https://github.com/kripken/emscripten/blob/6dc4ac5f9e4d8484e273e4dcc554f809738cedd6/src/settings.js#L237 (you would need to host websockify server somewhere).
But I don't have plans to work on this currently.