Yes. You can stream RTMP directly to Loola's endpoint using a 3rd party encoding software (OBS, Wirecast etc.)
To start select RTMP mode in the Loola Studio:
Next, copy and paste the RTMP Server URL and RTMP Key to your encoding software.
Once you start streaming from your encoding software, the video preview will show in the Loola studio (note: you need to enable Flash in your browser).
Next, click "Go Live" to actually start the streaming to the selected social platforms.
Ending the broadcast is done by clicking "End", or automatically when the RTMP stream stops for more than 30 seconds.
How to enable Flash:
Suggested Encoder settings: