fyi, i have tested my nodes to work on windows, linux, and mac, but should be easiest to setup on your ubuntu.
My preferred way of streaming video from rtsp cams to the dashboard (assuming you are referring to node-red-dashboard) is to connect to the cam using ffmpeg and then remuxing the h264 encoded video into a fragmented mp4 container and relaying that to the front end client side.
Firstly, before worrying about the on/off buttons, let's get a video stream working.
Currently, my nodes are not published to npm.js, but are available directly from github.
Assuming you have git installed, cd to the .node-red directory in the users home. There should be a package.json there. Run the following commands and then open the package.json to see if the modules were installed.
npm install kevinGodell/node-red-contrib-ffmpeg-spawn kevinGodell/node-red-contrib-mp4frag kevinGodell/node-red-contrib-ui-mp4frag
After installing and verifying the package.json file if you have easy access to it, then you must restart the node-red process for it to detect the new nodes in the pallette.
Import this flow and add the rtsp url to the SECRET input.
[{"id":"5273a6de.b59318","type":"tab","label":"mp4 video test","disabled":false,"info":""},{"id":"b80cada9.8f784","type":"inject","z":"5273a6de.b59318","name":"start","props":[{"p":"action","v":"{\"command\":\"start\"}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":"5","topic":"","x":150,"y":160,"wires":[["856b3636.3e0ab8"]]},{"id":"53023373.a797ec","type":"inject","z":"5273a6de.b59318","name":"restart","props":[{"p":"action","v":"{\"command\":\"restart\"}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":"1","topic":"","x":150,"y":220,"wires":[["856b3636.3e0ab8"]]},{"id":"cc88f04f.3fad1","type":"inject","z":"5273a6de.b59318","name":"stop","props":[{"p":"action","v":"{\"command\":\"stop\"}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","x":150,"y":280,"wires":[["856b3636.3e0ab8"]]},{"id":"856b3636.3e0ab8","type":"ffmpeg-spawn","z":"5273a6de.b59318","name":"","outputs":2,"cmdPath":"","cmdArgs":"[\"-rtsp_transport\",\"tcp\",\"-i\",\"SECRET\",\"-an\",\"-c:v\",\"copy\",\"-f\",\"mp4\",\"-movflags\",\"+frag_keyframe+empty_moov+default_base_moof\",\"pipe:1\"]","cmdOutputs":1,"killSignal":"SIGTERM","x":380,"y":220,"wires":[["5ba95f6b.9d606"],["5ba95f6b.9d606"]]},{"id":"5ba95f6b.9d606","type":"mp4frag","z":"5273a6de.b59318","name":"","outputs":2,"hlsPlaylistSize":"10","hlsPlaylistExtra":"5","basePath":"id","repeated":"false","timeLimit":"100000","preBuffer":"1","autoStart":"false","statusLocation":"displayed","x":680,"y":220,"wires":[["ade19c3c.45e87"],[]]},{"id":"ade19c3c.45e87","type":"ui_mp4frag","z":"5273a6de.b59318","name":"","group":"d6044a4e.91ee38","order":1,"width":"12","height":"10","readyPoster":"data:image/png;base64,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Let me know if you get stuck anywhere.
