Hey Walter (@krambriw), I'm also glad you are back 
Do you mean that setting 100 fps is equal to allowing the maximum fps that the rtsp source can deliver?
When I add the fabulous (
) node-red-contrib-msg-speed and node-red-contrib-image-info nodes to my flow:
[{"id":"66574007.74b0c","type":"exec","z":"18e47039.88483","command":"ffmpeg -f rtsp -i \"rtsp://freja.hiof.no:1935/rtplive/_definst_/hessdalen03.stream\" -f image2pipe pipe:1","addpay":false,"append":"","useSpawn":"true","timer":"","oldrc":false,"name":"Decode RTSP stream","x":1560,"y":820,"wires":[["2943cc00.7822e4"],[],[]]},{"id":"7d3aea16.d99b84","type":"inject","z":"18e47039.88483","name":"Start stream","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":1090,"y":820,"wires":[["66574007.74b0c"]]},{"id":"d8cdbb87.676ab8","type":"image","z":"18e47039.88483","name":"","width":"200","x":2150,"y":840,"wires":[]},{"id":"e9cc38bc.4300b8","type":"inject","z":"18e47039.88483","name":"Pause all streams","topic":"","payload":"SIGSTOP","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":1110,"y":860,"wires":[["53b625e3.eee7bc"]]},{"id":"4bdb02b2.c73efc","type":"inject","z":"18e47039.88483","name":"Resume all streams","topic":"","payload":"SIGCONT","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":1110,"y":900,"wires":[["53b625e3.eee7bc"]]},{"id":"53b625e3.eee7bc","type":"change","z":"18e47039.88483","name":"","rules":[{"t":"set","p":"kill","pt":"msg","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":1330,"y":860,"wires":[["66574007.74b0c"]]},{"id":"c6743afd.82d568","type":"inject","z":"18e47039.88483","name":"Stop all streams","topic":"","payload":"SIGTERM","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":1100,"y":940,"wires":[["53b625e3.eee7bc"]]},{"id":"c12393d5.0a2b2","type":"msg-speed","z":"18e47039.88483","name":"","frequency":"sec","estimation":false,"ignore":false,"x":1950,"y":820,"wires":[["4aa0ee29.c9164"],["d8cdbb87.676ab8"]]},{"id":"4aa0ee29.c9164","type":"ui_chart","z":"18e47039.88483","name":"","group":"94d2ac46.aad5d","order":0,"width":0,"height":0,"label":"fps","chartType":"line","legend":"false","xformat":"HH:mm:ss","interpolate":"linear","nodata":"fps","dot":false,"ymin":"","ymax":"","removeOlder":1,"removeOlderPoints":"","removeOlderUnit":"3600","cutout":0,"useOneColor":false,"colors":["#1f77b4","#aec7e8","#ff7f0e","#2ca02c","#98df8a","#d62728","#ff9896","#9467bd","#c5b0d5"],"useOldStyle":false,"x":2130,"y":800,"wires":[[],[]]},{"id":"2943cc00.7822e4","type":"image-info","z":"18e47039.88483","name":"","x":1770,"y":820,"wires":[["c12393d5.0a2b2"]]},{"id":"94d2ac46.aad5d","type":"ui_group","z":"","name":"Linear gauge widget test","tab":"76c22f9b.11403","disp":true,"width":"6","collapse":false},{"id":"76c22f9b.11403","type":"ui_tab","z":"","name":"Custom UI","icon":"dashboard"}]
Then I can see that the rtsp stream gives in my test case:
- Jpeg images of 1280x720 resolution
- Frame rate is <= 16 fps
It isn't really clear to me anymore whether Motion is faster (compared to Ffmpeg directly), or it is just a difference in resolution/fps/... ? But I have learned that the Exec-node does the job pretty well.
