Show ip camera in dashboard and store prefixed buffer video

This can be accomplished by running ffmpeg in the exec node and have it use your local hls.m3u8 as the source. This will be the easiest way to access the buffered video. You must set the correct params to tell ffmpeg where to put the mp4 and what its duration should be.

1 Like

Right, I should have understood that :wink:

@Lupin_III
interesting thread

would you mind sharing your working flow (menationed at threadstart) for showing ffmpeg streams on dashboard?

would be great, thx,
ozett

This is just a conceptual idea that I quickly built. In this case I used Motion and the available pre- and post buffering of frames, i.e. you can, like discussed above, define a number of frames to be added in front and after the actual event that is triggering the recording. Anyway, the demo also reveals that I was a bit lazy this morning, I had not been alert enough to clear the way to our front door from all snow that falled yesterday so when my daughter showed up, well, you see what I mean in the video below. Pretty nice anyway with all snow this time of the year!!

I have not yet experimented using ffmeg to grab the hls.m3u8 and save it to a file but that would be interesting to try so if anyone tried that already, maybe you could share the syntax/command with params needed

A demo showing recorded clips

2 Likes

@krambriw nice recordings! also, no key for your daughter? :smile:

I just did a quick cmd line with ffmpeg to record an mp4 from my HLS stream. It worked like a charm. In the most basic form, all you would need is ffmpeg -i https://123.45.67.89:1880/mp4frag/1/hls.m3u8 test.mp4 and ffmpeg will automatically figure out the input type and create the output. But of course, you can tweak the input and output to be whatever you like.

I was even able to pass a cookie(that i borrowed from my browser) to the headers of ffmpeg to get past my authentication middleware.
ffmpeg -headers "Cookie: nrca=s%3AeyJhbGciOiJIUzI1iIsInRcCI6IkpXVCJ9.eyJ1Ijoia2V2aW4iLCJyIjoiMTkyLjE2OCxLjcxIiwiaWF0IjoxNjEMDM4ODk0LCJleAiOjE2MTMyNDg0OTR9.GI2U2zhXOw530EyAgROAQH-afEZGXTOdzsb7zw.x1Z1bttYkQSjvMlXyT1bgDeLecWkhpz3ai7Gmx7fQ;" -i https://private.----------.com:1880/mp4frag/1/hls.m3u8 test.mp4

ffmpeg -h demuxer=hls: -live_start_index <int> .D....... segment index to start live streams at (negative values are from the end) (from INT_MIN to INT_MAX) (default -3)

live_start_index is what you will tweak to determine how far back in the buffered video that ffmpeg will start recording from the hls.m3u8 playlist. In my non scientific test, it seems that setting that to 0 gave me the most "pre trigger" video and using a negative number such as -5 gave me the least "pre trigger" video.

If you want ffmpeg to record a pre-determined length video after you trigger it, you can use -t 30 to make ffmpeg stop after 30 seconds duration.

The following just worked for me to make a 30 second mp4 from my authenticated hls.m3u8:
ffmpeg -headers "Cookie: nrca=s%3AeyJhbGciOiJIUz6IkpXVCJ9.eyJ1IjoiCJyIjoiMTkyLjE2OC4xLjcxIiwiaWF0IjoxNjEyMDM4ODk0Dg0OTR9.GI2jU2zhXAgwROvAQH-afEZGXtTOdzsb7zw.x1Z1kbttYkQSjvMlXyTkhpz3ai7Gmx7fQ;" -f hls -live_start_index 0 -i https://private.-.com:1880/mp4frag/1/hls.m3u8 -c copy -t 30 -f mp4 test3.mp4 -y

edit. It seems like using a big negative number -100 (or whatever number is greater than your total segments) for the live_start_index ensures that ffmpeg will use the oldest media segments in the hls.m3u8 playlist, which will give you the most "pre trigger" video.

I am able to get about 7 seconds of pre-trigger video from my example playlist that seems to contain 10 seconds( 20 pieces x 0.5 second duration) of video buffered:

#EXTM3U
#EXT-X-VERSION:7
#EXT-X-TARGETDURATION:1
#EXT-X-MEDIA-SEQUENCE:377674
#EXT-X-MAP:URI="init-hls.mp4"
#EXTINF:0.520000,
hls377674.m4s
#EXTINF:0.538000,
hls377675.m4s
#EXTINF:0.541000,
hls377676.m4s
#EXTINF:0.522000,
hls377677.m4s
#EXTINF:0.547000,
hls377678.m4s
#EXTINF:0.530000,
hls377679.m4s
#EXTINF:0.536000,
hls377680.m4s
#EXTINF:0.549000,
hls377681.m4s
#EXTINF:0.516000,
hls377682.m4s
#EXTINF:0.522000,
hls377683.m4s
#EXTINF:0.549000,
hls377684.m4s
#EXTINF:0.539000,
hls377685.m4s
#EXTINF:0.502000,
hls377686.m4s
#EXTINF:0.548000,
hls377687.m4s
#EXTINF:0.543000,
hls377688.m4s
#EXTINF:0.518000,
hls377689.m4s
#EXTINF:0.549000,
hls377690.m4s
#EXTINF:0.510000,
hls377691.m4s
#EXTINF:0.532000,
hls377692.m4s
#EXTINF:0.558000,
hls377693.m4s
2 Likes

Now that is cool!!!
One of my streams are available locally on the same RPi3 so I just used this command in the exec node

ffmpeg -f hls -live_start_index 0 -i http://127.0.0.1:1880/mp4frag/pools/hls.m3u8 -c copy -t 30 -f mp4 test3.mp4 -y

For sure it worked so good! I could not notice any additional cpu load either, Node-RED was also not affected, it felt as responsive as usual. The video starts with the pre-buffered video!

Amazing!

2 Likes

This is my originally flow, where I'm working on with the others suggestion.
I'm still not able to properly use Kevin's node
Practically you find a 5s timer that restarts the streaming, since I noted sometimes it was down and I had to manually restart it. A 30 seconds video record starts when the object is detected and an email is sent every 10 seconds with an image snapshot. You find a global context because from the dashboard I can switch on/off the video record and the mail sending.

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//months from 1-12\nvar day = addZero(dateObj.getDate());\nvar hour = addZero(dateObj.getHours());\nvar minute = addZero(dateObj.getMinutes());\nvar second = addZero(dateObj.getSeconds());\n// ffmpeg command\nvar ff_input = 'ffmpeg -rtsp_transport tcp -i ';\nvar ff_camera = '\"rtsp://admin:admin@192.168.43.15:554/11.264\" ';\nvar ff_output = \"-c:v copy -t 30 -r 5 -s 1200x800 \";\nvar path = \"YOUR_PATH\"\nvar file_date = year+month+day+\"_\"+hour+minute+second\nvar file_ext = \".mp4\"\nmsg={'payload' : ff_input+ff_camera+ff_output+path+file_date+file_ext}\n// file_date+file_ext i.e. 20201127_001101.mp4}\nreturn [msg];","outputs":1,"noerr":0,"initialize":"","finalize":"","x":850,"y":380,"wires":[["110353c6.f470fc"]]},{"id":"110353c6.f470fc","type":"exec","z":"8b4efa21.5183e8","command":"","addpay":true,"append":"","useSpawn":"false","timer":"","oldrc":false,"name":"Record RTSP 30s","x":1070,"y":380,"wires":[[],[],[]]},{"id":"991a2260.21943","type":"inject","z":"8b4efa21.5183e8","name":"At load","repeat":"","crontab":"","once":true,"onceDelay":"8","topic":"","payload":"","payloadType":"date","x":140,"y":240,"wires":[["3580d39f.6ee12c"]]},{"id":"9bb2f027.bbd83","type":"exec","z":"8b4efa21.5183e8","command":"","addpay":true,"append":"","useSpawn":"true","timer":"","oldrc":false,"name":"RTSP stream","x":580,"y":120,"wires":[["8a1404d4.0f28f8","3f89b6e9.e81eea"],[],["95ed1d2e.f5af2","53b9fc12.b94634"]]},{"id":"95ed1d2e.f5af2","type":"change","z":"8b4efa21.5183e8","name":"","rules":[{"t":"set","p":"kill","pt":"msg","to":"SIGTERM","tot":"str"},{"t":"delete","p":"payload","pt":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":360,"y":180,"wires":[["9bb2f027.bbd83"]]},{"id":"6f3f82c3.5191fc","type":"inject","z":"8b4efa21.5183e8","name":"Restart stream","repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":160,"y":180,"wires":[["95ed1d2e.f5af2"]]},{"id":"3580d39f.6ee12c","type":"function","z":"8b4efa21.5183e8","name":"Command","func":"//sub stream\nvar ff_input = 'ffmpeg -rtsp_transport tcp -i ';\nvar ff_camera = '\"rtsp://admin:admin@192.168.43.15:554/12.264\" ';\nvar ff_output = '-r 5 -f image2pipe pipe:1'\nmsg.payload = ff_input+ff_camera+ff_output;\nreturn [msg];","outputs":1,"noerr":0,"initialize":"","finalize":"","x":450,"y":240,"wires":[["9bb2f027.bbd83"]]},{"id":"53b9fc12.b94634","type":"trigger","z":"8b4efa21.5183e8","name":"","op1":"","op2":"","op1type":"nul","op2type":"date","duration":"5","extend":false,"units":"s","reset":"","bytopic":"all","outputs":1,"x":660,"y":200,"wires":[["3580d39f.6ee12c"]]},{"id":"f225b328.4739a","type":"trigger","z":"8b4efa21.5183e8","name":"","op1":"true","op2":"","op1type":"bool","op2type":"nul","duration":"35","extend":false,"overrideDelay":true,"units":"s","reset":"","bytopic":"all","topic":"topic","outputs":1,"x":650,"y":380,"wires":[["a7c47dd0.d7f1b"]]},{"id":"b93ff431.8e97f8","type":"function","z":"8b4efa21.5183e8","name":"Yes/No mail","func":"if (msg.payload.length == 0 || global.get(\"my_mail\") === false ){\n    return [null, null];\n} else {\n    msg1={\n        'payload': msg.image,\n        'class' : msg.payload[0].class\n    }\n    msg2={\n        'payload': true\n    }   \n    return [msg1,msg2];\n}","outputs":2,"noerr":0,"initialize":"","finalize":"","x":590,"y":320,"wires":[["1a3e6c32.5941c4"],["f225b328.4739a"]]},{"id":"3f89b6e9.e81eea","type":"switch","z":"8b4efa21.5183e8","name":"Yes/No detection","property":"my_mail","propertyType":"global","rules":[{"t":"true"}],"checkall":"true","repair":false,"outputs":1,"x":910,"y":200,"wires":[["68961182.8caa1"]]},{"id":"90e78eb1.79eed","type":"ui_group","name":"Object detection","tab":"9adab06f.35c7a","order":1,"disp":true,"width":"9","collapse":false},{"id":"9adab06f.35c7a","type":"ui_tab","name":"Home","icon":"dashboard","disabled":false,"hidden":false}]

I know it's still a rudimental flow, since my limited knowledge on this topic.
I see others are obtaining much more result. So, please if you can post the node code, otherwise it would be difficult to understand in which node and in which way you are using it.
Thanks a lot to all

Sorry, but maybe there is something I don't understand, or I setting something wrong.

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= {\n    kill:'SIGTERM',\n    payload : 'SIGTERM'\n}\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":450,"y":240,"wires":[["14e12300.9e9f1d"]]},{"id":"6d31275d.9f5fe8","type":"function","z":"42225c1a.355354","name":"Command","func":"var ff_input = 'ffmpeg -rtsp_transport tcp -i ';\nvar ff_camera = '\"rtsp://admin:admin@192.168.43.15:554/12.264\" ';\nvar ff_output = '-c:v h264 -f mp4 -movflags rtphint+frag_every_frame+empty_moov+default_base_moof -min_frag_duration 500000 pipe:1';\nmsg.payload = ff_input+ff_camera+ff_output;\nreturn [msg];\n","outputs":1,"noerr":0,"initialize":"","finalize":"","x":470,"y":200,"wires":[["14e12300.9e9f1d"]]},{"id":"d27e2289.36fa3","type":"base64","z":"42225c1a.355354","name":"b64","action":"str","property":"payload","x":830,"y":320,"wires":[["e7b0e073.a61e6"]]},{"id":"e7b0e073.a61e6","type":"ui_template","z":"42225c1a.355354","group":"a90d6a68.8dc3b8","name":"dash oeuf","order":1,"width":6,"height":4,"format":"<div layout-align=\"space-between center\">\n<img src=\"data:image/jpg;base64,{{msg.payload}}\"/>\n</div>","storeOutMessages":true,"fwdInMessages":true,"resendOnRefresh":false,"templateScope":"local","x":980,"y":320,"wires":[[]]},{"id":"7232d3e2.bf169c","type":"exec","z":"42225c1a.355354","command":"","addpay":true,"append":"","useSpawn":"true","timer":"","oldrc":false,"name":"RTSP stream","x":660,"y":320,"wires":[["d27e2289.36fa3"],[],[]]},{"id":"b850b174.a0992","type":"function","z":"42225c1a.355354","name":"Command","func":"var ff_input = 'ffmpeg -rtsp_transport tcp -i ';\nvar ff_camera = '\"rtsp://admin:admin@192.168.43.15:554/12.264\" ';\nvar ff_output = '-f image2pipe pipe:1'\nmsg.payload = ff_input+ff_camera+ff_output;\nreturn [msg];","outputs":1,"noerr":0,"initialize":"","finalize":"","x":450,"y":300,"wires":[["7232d3e2.bf169c"]]},{"id":"356cc59c.c006da","type":"inject","z":"42225c1a.355354","name":"Start stream","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":"1","topic":"","payload":"true","payloadType":"bool","x":130,"y":300,"wires":[["5e9ca4b8.54ab1c"]]},{"id":"3029c066.a7c26","type":"inject","z":"42225c1a.355354","name":"Stop stream","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"false","payloadType":"bool","x":130,"y":340,"wires":[["5e9ca4b8.54ab1c"]]},{"id":"5e9ca4b8.54ab1c","type":"switch","z":"42225c1a.355354","name":"","property":"payload","propertyType":"msg","rules":[{"t":"true"},{"t":"false"}],"checkall":"true","repair":false,"outputs":2,"x":290,"y":320,"wires":[["b850b174.a0992"],["fd493527.fb8438"]]},{"id":"fd493527.fb8438","type":"function","z":"42225c1a.355354","name":"stop","func":"msg = {\n    kill:'SIGTERM',\n    payload : 'SIGTERM'\n}\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":430,"y":340,"wires":[["7232d3e2.bf169c"]]},{"id":"a90d6a68.8dc3b8","type":"ui_group","name":"videoTest","tab":"250de740.57ee78","order":14,"disp":false,"width":"6","collapse":false},{"id":"250de740.57ee78","type":"ui_tab","name":"Dashboard","icon":"dashboard","order":1,"disabled":false,"hidden":false}]

I compare the same camera within this example on a Win10 machine. I think frag node requires a bit more resources in order to have the streaming video immediatly available as mp4.
Probably it's not as simple as it could seem, but at the and we already have a video buffer aailable "as it is" with the simple exe code or, even more, already encoded after a base64 node. It is possible there is no way to convert it only when it needed?
On this purpose I tried with the frag node but without succeeding :frowning:
Googling, apparently there are several ways to do it. But they go so deep into specific details which are not so easy for who doesn't have familiarity with them

@Lupin_III

Hi, to me it is not clear what is your use case or goal. What is it that you want to do? I do not have any rtsp camera so I cannot test your flow but I understand you build two streams and one is converted to mp4. Is this not what you want? Why you need the other making jpg's?

Hi @ krambriw
the flow I posted was just a comparison between two way of showing the camera on the dashboard. Since I need to find a way to register a prefixed buffer video lenght, I'm asking help. In the previous post I wonted to underline that i cannot find how to do that even with the frag node.
To simply stream a video or record it "from now on" it's not a problem, and we can do it in several way.
Forget for now rtsp or other format input camera. Are you able to record a prefixed video length with some seconds before the trigger time?
If I'm not wrong, It seems that Kevin was able to do something but I cannot reproduce it.

Yes, it was possible following Kevin's instructions, it must be you did not

You have to have a mp4 stream running, like in your first part in your example flow. Then you need a second one starting ffmpeg but now recording that. This should work. I would try like below with your camera

First start the camera stream and let it roll a minute or so, check in the gui you see it and it works.

Then you can try to record. Each will give a 30 second recording. Notice something in the real time so you know when you click "Do record" so you know where the start is. Next when recording is finished you can view it and you should notice that the recording includes pre-video, means video before you actually clicked the button. The first example with start_index 0 is the first to try, the second with start_index -100 should give maximum pre-recorded video, Kevin said like 7 s

If it is difficult to verify, if the video you are looking at is very "static" you can try with a pre-recorded movie or so instead of camera as source

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","hlsJsConfig":"{\"liveDurationInfinity\":true,\"liveBackBufferLength\":5,\"maxBufferLength\":10,\"manifestLoadingTimeOut\":1000,\"manifestLoadingMaxRetry\":10,\"manifestLoadingRetryDelay\":500}","retry":true,"play":true,"unload":true,"threshold":0.5,"players":["socket.io","hls.js","hls","mp4"],"x":1180,"y":180,"wires":[[]]},{"id":"fae94671.29dca8","type":"function","z":"b7846ba4.571b18","name":"stop","func":"msg = {\n    kill:'SIGTERM',\n    payload : 'SIGTERM'\n}\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":600,"y":200,"wires":[["14e12300.9e9f1d"]]},{"id":"6d31275d.9f5fe8","type":"function","z":"b7846ba4.571b18","name":"Command","func":"var ff_input = 'ffmpeg -rtsp_transport tcp -i ';\nvar ff_camera = '\"rtsp://admin:admin@192.168.43.15:554/12.264\" ';\nvar ff_output = '-c:v h264 -f mp4 -movflags rtphint+frag_every_frame+empty_moov+default_base_moof -min_frag_duration 500000 pipe:1';\nmsg.payload = ff_input+ff_camera+ff_output;\nreturn [msg];\n","outputs":1,"noerr":0,"initialize":"","finalize":"","x":620,"y":160,"wires":[["14e12300.9e9f1d"]]},{"id":"71d25fc7.198c9","type":"inject","z":"b7846ba4.571b18","name":"Do record","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"true","payloadType":"bool","x":280,"y":350,"wires":[["ef8d0faa.c31da"]]},{"id":"ef8d0faa.c31da","type":"exec","z":"b7846ba4.571b18","command":"ffmpeg -f hls -live_start_index 0 -i http://127.0.0.1:1880/mp4frag/cam1/hls.m3u8 -c copy -t 30 -f mp4 cam1_0.mp4 -y","addpay":false,"append":"","useSpawn":"false","timer":"","oldrc":false,"name":"","x":840,"y":350,"wires":[[],[],[]]},{"id":"d5a60035.8e272","type":"inject","z":"b7846ba4.571b18","name":"Do record","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"true","payloadType":"bool","x":280,"y":470,"wires":[["d4546304.ceb57"]]},{"id":"d4546304.ceb57","type":"exec","z":"b7846ba4.571b18","command":"ffmpeg -f hls -live_start_index -100 -i http://127.0.0.1:1880/mp4frag/cam1/hls.m3u8 -c copy -t 30 -f mp4 cam1_100.mp4 -y","addpay":false,"append":"","useSpawn":"false","timer":"","oldrc":false,"name":"","x":860,"y":470,"wires":[[],[],[]]},{"id":"bae8c347.0daa5","type":"comment","z":"b7846ba4.571b18","name":"Start index 0","info":"","x":290,"y":310,"wires":[]},{"id":"57d4f7ec.4c7a08","type":"comment","z":"b7846ba4.571b18","name":"Start index -100","info":"","x":300,"y":430,"wires":[]},{"id":"a90d6a68.8dc3b8","type":"ui_group","name":"videoTest","tab":"250de740.57ee78","order":14,"disp":false,"width":"6","collapse":false},{"id":"250de740.57ee78","type":"ui_tab","name":"Dashboard","icon":"dashboard","order":1,"disabled":false,"hidden":false}]

Thanks a lot, I'll try asap and I'll let you know.
As I told before I need it working on both PC and Raspberry. For Win I don't see big problems. Do you have any tips for my raspy 3B+ model? I mean for examples GPU settings or some more option inside the ffmpeg command.

Yes, but eventually you have to build ffmpeg with gpu support and some more, don't remember by heart what I did but I think is also described in the other thread that Kevin started. I have to check what I did

A typical cmd line I use in my RPi3 to make use of the gpu is the following (the camera is not online it seems)

ffmpeg -loglevel quiet -rtsp_transport tcp -i rtsp://freja.hiof.no:1935/rtplive/_definst_/hessdalen02.stream -c:v h264_omx -bsf:a aac_adtstoasc -f mp4 -movflags +frag_every_frame+empty_moov+default_base_moof -min_frag_duration 500000 pipe:1

It is the h264_omx that is there for the gpu use

Actually found it here

I did set the gpu memory to 256, i.e. gpu_mem=256

Try first before compiling ffmpeg, it might have support for hardware H.264 encoder plugin already!

But I'm not sure it will improve with rtsp cameras

Thanks so much Krambriw.
Meanwhile I tryed your flows (on a win10 PC).

  • My main error was that I had misunderstood the "http://127.0.0.1:1880/mp4frag/cam1/hls.m3u8" command. I thought it was your camera input. Instead it is the output of the frag node that is now available for the next record step. And I see the camera "cam1" on the dashboard within the ui_mp4frag.
    But when I try to record it I always get the errore code 1. I tryed several ways: putting or not the mp4 patch between " ", using double \, as well as the input http://127.0.0.1:1880/mp4frag/cam1/hls.m3u8 between " " or not. But nothing

object
_msgid: "8ff759de.48db48"
topic: ""
payload: ""
rc: object
code: 1
message: "Command failed: ffmpeg -f hls -live_start_index 0 -i "http://127.0.0.1:1880/mp4frag/cam1/hls.m3u8" -c copy -t 30 -f mp4 "C:\Users\Io\Desktop\test\test.mp4" -y↵ffmpeg version 2020-11-25-git-3de3d2f5e2-full_build-www.gyan.dev Copyright (c) 2000-2020 the FFmpeg developers↵ built with gcc 10.2.0 (Rev5, Built by MSYS2 project)↵ configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --e..."

I have only tried with my RPi3 (Raspbian), not interested doing it in Windows. However having a browser running for viewing the gui is what I do both in mac and Widows.

Why do you have to do ffmpeg stuff on Windows? Is it because you have a better computer with Windows? I would do all ffmpeg stuff in Linux and then view the mp4 over the network in mac, windows etc

Why do you have to do ffmpeg stuff on Windows? Is it because you have a better computer with Windows? I would do all ffmpeg stuff in Linux and then view the mp4 over the network in mac, windows etc

Just because for several reasons in one place I have a raspy, in another a Win PC. And I would have just one node-red project to maintain and develop.
If you think that there should be a better option for windows than ffmpeg, it wouldn't be a problem make a system check in a node and run the other command. But searching I see ffmpeg is large used even on Win
Anyway, it's not a problem to show the camera on the dashboard, even thanks to your suggestion. The problem now is the record command

Alright, yeah I guess it should work and I would also stick to ffmpeg

Anyway, the error message you showed is not complete, why the command failed. I guess some more info must be there??

If it can help i can copy-paste them as text

Open up the "message" part, click on the > arrow, then copy & paste the complete message you see there, I believe it will tell more about the error