I solved:
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12","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":800,"y":360,"wires":[]},{"id":"d1112dfcbfef615b","type":"ui_button","z":"5273a6de.b59318","name":"","group":"46d6d60673638810","order":1,"width":0,"height":0,"passthru":false,"label":"Start","tooltip":"","color":"","bgcolor":"","className":"","icon":"","payload":"","payloadType":"str","topic":"topic","topicType":"msg","x":170,"y":300,"wires":[["c04f8845a87abbcd"]]},{"id":"2858e68578995d73","type":"ui_button","z":"5273a6de.b59318","name":"","group":"46d6d60673638810","order":1,"width":0,"height":0,"passthru":false,"label":"Stop","tooltip":"","color":"","bgcolor":"","className":"","icon":"","payload":"","payloadType":"str","topic":"topic","topicType":"msg","x":170,"y":340,"wires":[["379c223a6ef2f8ea"]]},{"id":"c04f8845a87abbcd","type":"change","z":"5273a6de.b59318","name":"","rules":[{"t":"set","p":"action","pt":"msg","to":"{\"command\":\"start\",\"args\":[\"-loglevel\",\"quiet\",\"-rtsp_transport\",\"tcp\",\"-i\",\"rtsp://belov:belov12345678@192.168.1.129:554/cam/realmonitor?channel=1&subtype=0\",\"-an\",\"-c:v\",\"copy\",\"-f\",\"mp4\",\"-movflags\",\"+frag_every_frame+empty_moov+default_base_moof\",\"-min_frag_duration\",\"1000000\",\"pipe:1\"]}","tot":"json"}],"action":"","property":"","from":"","to":"","reg":false,"x":380,"y":300,"wires":[["7a8c3f95b486b8f9"]]},{"id":"379c223a6ef2f8ea","type":"change","z":"5273a6de.b59318","name":"","rules":[{"t":"set","p":"action","pt":"msg","to":"{\"command\":\"stop\",\"args\":[\"-loglevel\",\"quiet\",\"-rtsp_transport\",\"tcp\",\"-i\",\"rtsp://belov:belov12345678@192.168.1.129:554/cam/realmonitor?channel=1&subtype=0\",\"-an\",\"-c:v\",\"copy\",\"-f\",\"mp4\",\"-movflags\",\"+frag_every_frame+empty_moov+default_base_moof\",\"-min_frag_duration\",\"1000000\",\"pipe:1\"]}","tot":"json"}],"action":"","property":"","from":"","to":"","reg":false,"x":380,"y":340,"wires":[["7a8c3f95b486b8f9"]]},{"id":"46d6d60673638810","type":"ui_group","name":"","tab":"9eb9a9fcd56859ba","order":1,"disp":true,"width":"22","collapse":false,"className":""},{"id":"9eb9a9fcd56859ba","type":"ui_tab","name":"Camera Mergulhador","icon":"dashboard","order":2,"disabled":false,"hidden":false}]
{
"command": "stop",
"args": [
"-loglevel",
"quiet",
"-rtsp_transport",
"tcp",
"-i",
"rtsp://user:pass@192.168.1.129:554/cam/realmonitor?channel=1&subtype=0",
"-an",
"-c:v",
"copy",
"-f",
"mp4",
"-movflags",
"+frag_every_frame+empty_moov+default_base_moof",
"-min_frag_duration",
"1000000",
"pipe:1"
]
}