# Node-red-contrib-ffmpeg-spawn

**URL:** <https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427>\
**Category:** Developing Nodes\
**Created:** [20 April 2021 01:25 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427 "2021-04-20T01:25:14Z")\
**Posts on this page:** 20\
**Page:** 3

<div class="post-metadata">

**Author:** ![krambriw](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/krambriw/32/5429_2.png) [@krambriw](https://discourse.nodered.org/u/krambriw)\
**Post date:** [24 April 2021 17:47 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/41 "2021-04-24T17:47:10Z")

</div>

_EDIT: and of course I have the same error in my settings, +frag\_keyframe versus +frag\_every\_frame_  
_ **Embarrassing** _

I believe I have the same setting for ffmpeg-spawn and the exec, this is my simple test flow taking the stream from one of my cameras as mentioned. I connect to them using http. Please do modify the url in the commands to fit any of your own sources

BTW How can we check so that we know we have the same most recent version as you mention?

```auto
[{"id":"dd40be61.4e29f","type":"inject","z":"4e2296ba.635af8","name":"Start stream","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":"1","topic":"","payload":"true","payloadType":"bool","x":140,"y":130,"wires":[["96fdc212.96085"]]},{"id":"9665a078.26fe7","type":"inject","z":"4e2296ba.635af8","name":"Stop stream","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"false","payloadType":"bool","x":140,"y":176,"wires":[["5d4a09e.dd61cf8"]]},{"id":"5d4a09e.dd61cf8","type":"switch","z":"4e2296ba.635af8","name":"","property":"payload","propertyType":"msg","rules":[{"t":"true"},{"t":"false"}],"checkall":"true","repair":false,"outputs":2,"x":470,"y":130,"wires":[["bf1296a0.fb6008"],["ea9b78f2.69c808"]]},{"id":"ea9b78f2.69c808","type":"function","z":"4e2296ba.635af8","name":"stop","func":"msg = {\n kill:'SIGHUP',\n payload : 'SIGHUP' \n}\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":490,"y":179,"wires":[["bf1296a0.fb6008"]]},{"id":"bf1296a0.fb6008","type":"exec","z":"4e2296ba.635af8","command":"ffmpeg -i http://192.168.0.237:8889/?action=stream -c:v h264_omx -c:a aac -f mp4 -movflags +frag_every_frame+empty_moov+default_base_moof -min_frag_duration 500000 pipe:1","addpay":false,"append":"","useSpawn":"true","timer":"","oldrc":false,"name":"Camera testing","x":679,"y":150,"wires":[["8c43fe42.67586"],[],["8c43fe42.67586"]]},{"id":"13a8f08d.2ebf6f","type":"ui_mp4frag","z":"4e2296ba.635af8","name":"exec","group":"f850b4c5.fff4d8","order":3,"width":"9","height":"5","readyPoster":"https://raw.githubusercontent.com/kevinGodell/node-red-contrib-ui-mp4frag/master/video_playback_ready.png","errorPoster":"https://raw.githubusercontent.com/kevinGodell/node-red-contrib-ui-mp4frag/master/video_playback_error.png","hlsJsConfig":"{\"liveDurationInfinity\":true,\"liveBackBufferLength\":0,\"maxBufferLength\":5,\"manifestLoadingTimeOut\":1000,\"manifestLoadingMaxRetry\":10,\"manifestLoadingRetryDelay\":500}","retry":true,"play":true,"unload":true,"threshold":0.5,"players":["hls.js","mp4","hls","socket.io"],"x":1080,"y":150,"wires":[[]]},{"id":"8c43fe42.67586","type":"mp4frag","z":"4e2296ba.635af8","name":"exec","migrate":1e-9,"hlsPlaylistSize":"10","hlsPlaylistExtra":"5","basePath":"kalle1","x":901,"y":147,"wires":[["13a8f08d.2ebf6f"],[]]},{"id":"96fdc212.96085","type":"delay","z":"4e2296ba.635af8","name":"","pauseType":"rate","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":true,"x":310,"y":130,"wires":[["5d4a09e.dd61cf8"]]},{"id":"842cfeac.32eaf","type":"ffmpeg-spawn","z":"4e2296ba.635af8","name":"","outputs":5,"migrate":1e-9,"cmdPath":"ffmpeg","cmdArgs":"[\"-i\",\"http://192.168.0.237:8889/?action=stream\",\"-c:v\",\"h264_omx\",\"-c:a\",\"aac\",\"-f\",\"mp4\",\"-movflags\",\"+frag_keyframe+empty_moov+default_base_moof\",\"-min_frag_duration\",\"500000\",\"pipe:1\"]","cmdOutputs":4,"killSignal":"SIGTERM","x":360,"y":350,"wires":[["81d2ebcd.11f048"],["81d2ebcd.11f048"],["d60b30b7.66176"],[],[]]},{"id":"c2c98b01.1707d8","type":"inject","z":"4e2296ba.635af8","name":"start default","props":[{"p":"action","v":"{\"command\":\"start\"}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":"1","topic":"","payloadType":"str","x":140,"y":290,"wires":[["842cfeac.32eaf"]]},{"id":"b033e9c.c1cda18","type":"inject","z":"4e2296ba.635af8","name":"stop default","props":[{"p":"action","v":"{\"command\":\"stop\"}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payloadType":"str","x":140,"y":391,"wires":[["842cfeac.32eaf"]]},{"id":"6958e941.bb1788","type":"comment","z":"4e2296ba.635af8","name":"start ffmpeg","info":"","x":140,"y":254,"wires":[]},{"id":"ec3d0da.21a88f","type":"comment","z":"4e2296ba.635af8","name":"stop 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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":["hls.js","mp4","hls","socket.io"],"x":870,"y":360,"wires":[[]]},{"id":"e6b316e0.a12ba8","type":"comment","z":"4e2296ba.635af8","name":"start ffmpeg","info":"","x":140,"y":464,"wires":[]},{"id":"d60b30b7.66176","type":"debug","z":"4e2296ba.635af8","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":640,"y":460,"wires":[]},{"id":"f850b4c5.fff4d8","type":"ui_group","name":"Video compare","tab":"5cc557bf.a009c8","order":1,"disp":false,"width":"12","collapse":false},{"id":"5cc557bf.a009c8","type":"ui_tab","name":"Video compare","icon":"dashboard","disabled":false,"hidden":false}]

```

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/6/a/6ab38c096d8e60678b255c22a1597caa9960a020.png)

---

<div class="post-metadata">

**Author:** ![SuperNinja](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/superninja/32/5761_2.png) [@SuperNinja](https://discourse.nodered.org/u/SuperNinja)\
**Post date:** [24 April 2021 17:52 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/42 "2021-04-24T17:52:36Z")

</div>

> [@kevinGodell](#):
>
> if you are so kind

yes of course 👼 lol

```auto
[
    "-loglevel",
    "quiet",
    "-rtsp_transport",
    "tcp",
    "-i",
    "rtsp://192.168.1.9:554/user= ****_password=**** _channel=0_stream=1.sdp?real_stream",
    "-c:a",
    "aac",
    "-c:v",
    "copy",
    "-f",
    "mp4",
    "-movflags",
    "+frag_keyframe+empty_moov+default_base_moof",
    "pipe:1",
    "-progress",
    "pipe:2"
]

```

_This is the ffmpeg-spawn_

```auto
ffmpeg -loglevel quiet -rtsp_transport tcp -i rtsp://192.168.1.9:554/user= ****_password=**** _channel=0_stream=1.sdp?real_stream -c:a aac -c:v copy -f mp4 -movflags +frag_every_frame+empty_moov+default_base_moof -min_frag_duration 500000 pipe:1

```

_This is the EXE_  
I just saw that `-min_frag_duration 500000`is missing in the ffmpeg-spawn, Could this be the source of the problem?

**[EDIT]**

> [@kevinGodell](#):
>
> that really sounds like a -movflags `+frag_keyframe versus +frag_every_frame` situation. To be 100% sure, please investigate the movflags in your args.

Ooohhhh, yes the error, **frag\_keyframe** instead of **frag\_every\_frame**. Like what you always have to check in the smallest details. They looked so alike that I hadn't seen the difference !!!  
**Obviously it works,** I no longer have any delay compared to EXE !! Great 🤩 ! Thanks all .

---

<div class="post-metadata">

**Author:** ![kevinGodell](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/kevingodell/32/27040_2.png) [@kevinGodell](https://discourse.nodered.org/u/kevinGodell)\
**Post date:** [24 April 2021 19:50 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/43 "2021-04-24T19:50:37Z")

</div>

> [@SuperNinja](#):
>
> Ooohhhh, yes the error, **frag\_keyframe** instead of **frag\_every\_frame**. Like what you always have to check in the smallest details. They looked so alike that I hadn't seen the difference !!!  
> **Obviously it works,** I no longer have any delay compared to EXE !! Great 🤩 ! Thanks all .

Thanks for confirming. And frankly, thanks for making me have to prove it. This helps for the future when another user may have a similar issue. Its definitely good to work out the small details now.

On another note, I merged the node-red-contrib-mp4frag #recorder branch with #master. The internal dependency, `mp4frag`, has been updated to v0.4.0 and published to npm. Using **branches** with **yarn** has caused me a bit of issues.

The new way to get the latest version of node-red-contrib-mp4frag is:  
`npm install kevinGodell/node-red-contrib-mp4frag`  
or  
`yarn add kevinGodell/node-red-contrib-mp4frag`

I will be in the process of cleaning it up so in the near future after dashboard is at 3.0 and its dependency of socket io is at 3.0, I will publish to npm to make these nodes easier to install. Maintaining versions to support dashboard 2.0 and 3.0 would have consumed too much of my time that is already in short supply.

As for ffmpeg-spawn, I will probably be able to publish to npm sooner than the mp4frags since it has no dependencies. Just have to get the readme and help text written after finalizing features.

---

<div class="post-metadata">

**Author:** ![kevinGodell](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/kevingodell/32/27040_2.png) [@kevinGodell](https://discourse.nodered.org/u/kevinGodell)\
**Post date:** [24 April 2021 23:48 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/44 "2021-04-24T23:48:13Z")

</div>

An update to ffmpeg-spawn. Added feature to split or combine the output messages, in the case that you want to combine output and filter by topic. Currently, output topics are fixed and derived from array: ['status', 'stdout', 'stderr', 'stdio3', 'stdio4', 'stdio5']. The index of the topic corresponds to what would be the node output when split.

A simple flow example showing a side by side comparison of split vs combined output:

```auto
[{"id":"48e02cfe.7cb014","type":"inject","z":"5967c855.68b978","name":"start","props":[{"p":"action","v":"{\"command\":\"start\"}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","x":269,"y":783,"wires":[["ffc6a303.54b73"]]},{"id":"ffc6a303.54b73","type":"ffmpeg-spawn","z":"5967c855.68b978","name":"","outputs":2,"migrate":2e-9,"cmdPath":"","cmdArgs":"[\"-version\"]","cmdOutputs":1,"killSignal":"SIGTERM","msgOutput":"split","x":435,"y":783,"wires":[[],["23ddb71.08b0548"]]},{"id":"abb559f9.d13f48","type":"debug","z":"5967c855.68b978","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":762,"y":783,"wires":[]},{"id":"23ddb71.08b0548","type":"function","z":"5967c855.68b978","name":"","func":"const version = msg.payload.toString().split(' ')[2];\n\nconst message = `version: ${version}`;\n\nnode.status({ fill: 'green', shape: 'dot', text: message });\n\nreturn { payload: version };","outputs":1,"noerr":0,"initialize":"","finalize":"","x":618,"y":783,"wires":[["abb559f9.d13f48"]]},{"id":"9f6f436d.b10aa","type":"inject","z":"5967c855.68b978","name":"start","props":[{"p":"action","v":"{\"command\":\"start\"}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","x":270,"y":860,"wires":[["4ee683b9.ccf13c"]]},{"id":"4ee683b9.ccf13c","type":"ffmpeg-spawn","z":"5967c855.68b978","name":"","outputs":1,"migrate":2e-9,"cmdPath":"","cmdArgs":"[\"-version\"]","cmdOutputs":1,"killSignal":"SIGTERM","msgOutput":"combined","x":436,"y":860,"wires":[["4a38c204.c85b4c"]]},{"id":"6d72faf.b638204","type":"debug","z":"5967c855.68b978","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":763,"y":860,"wires":[]},{"id":"4a38c204.c85b4c","type":"function","z":"5967c855.68b978","name":"","func":"const { topic } = msg;\n\nif (topic === 'stdout') {\n const version = msg.payload.toString().split(' ')[2];\n\n const message = `version: ${version}`;\n\n node.status({ fill: 'green', shape: 'dot', text: message });\n\n return { payload: version };\n}\n\nreturn;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":619,"y":860,"wires":[["6d72faf.b638204"]]}]

```

![Screen Shot 2021-04-24 at 6.49.03 PM](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/e/9/e9196d0d8cb6886f7494b2e2954e7e9d38e33da7.png)

---

<div class="post-metadata">

**Author:** ![thejollypop](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/thejollypop/32/36597_2.png) [@thejollypop](https://discourse.nodered.org/u/thejollypop)\
**Post date:** [25 April 2021 06:56 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/45 "2021-04-25T06:56:16Z")

</div>

For Docker users ([Linux Alpine](https://github.com//node-red/node-red-docker#image-variations) or [Debian](https://github.com/node-red/node-red-docker/blob/master/docker-custom/README.md)), It's mandatory to have FFMPEG installed,  
Since I'm getting the following error.

```auto
Error: spawn ffmpeg ENOENT

```

![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/d/d/dde87981fa513700fc3101ecb136eb1be3e1b42a.png)

I tried installing [ffmpeg-for-homebridge](https://github.com/homebridge/ffmpeg-for-homebridge) which worked before, but no luck.  
Any Idea how to overcome this FFMPEG limitation? Is there a way to make it standalone?

BTW, thanks for the `node-red-contrib-ffmpeg-spawn` node;-)

---

<div class="post-metadata">

**Author:** ![SuperNinja](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/superninja/32/5761_2.png) [@SuperNinja](https://discourse.nodered.org/u/SuperNinja)\
**Post date:** [25 April 2021 09:03 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/46 "2021-04-25T09:03:58Z")

</div>

> [@kevinGodell](#):
>
> The new way to get the latest version of node-red-contrib-mp4frag is:  
> `npm install kevinGodell/node-red-contrib-mp4frag`

- i juste update all "package" and see that always `v0.1.0`  
versions.

```auto
cd ~/.node-red
npm install kevinGodell/node-red-contrib-ffmpeg-spawn
npm install kevinGodell/node-red-contrib-mp4frag
npm install kevinGodell/node-red-contrib-ui-mp4frag
npm install node-red-contrib-pipe2jpeg

result after install : 25 avril 2021
-------------------
+ node-red-contrib-ffmpeg-spawn@0.1.0
updated 1 package in 35.443s
+ node-red-contrib-mp4frag@0.1.0
updated 2 packages in 35.219s
+ node-red-contrib-ui-mp4frag@0.1.0
updated 1 package in 33.968s
+ node-red-contrib-pipe2jpeg@0.1.0
updated 1 package in 29.371s

```

- Not see `v0.4.0` ? 🤔

---

<div class="post-metadata">

**Author:** ![kevinGodell](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/kevingodell/32/27040_2.png) [@kevinGodell](https://discourse.nodered.org/u/kevinGodell)\
**Post date:** [25 April 2021 11:58 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/47 "2021-04-25T11:58:35Z")

</div>

> [@thejollypop](#):
>
> I tried installing [ffmpeg-for-homebridge](https://github.com/homebridge/ffmpeg-for-homebridge) which worked before, but no luck.  
> Any Idea how to overcome this FFMPEG limitation? Is there a way to make it standalone?
> 
> BTW, thanks for the `node-red-contrib-ffmpeg-spawn` node;-)

One option is that you can install ffmpeg from npm:

1. `npm install @ffmpeg-installer/ffmpeg`
2. look in your node\_modules folder to try and deduce its path to the ffmpeg binary
3. add the path to ffmpeg-spawn (for me its `/home/pi/.node-red/node_modules/@ffmpeg-installer/linux-arm/ffmpeg`) but it should be different for you based on your system
4. run the flow to see the ffmpeg version output (mine is now showing different)

**EDIT** I just tried installing `ffmpeg-for-homebridge` and found its ffmpeg binary installed to `/home/pi/.node-red/node_modules/ffmpeg-for-homebridge/ffmpeg`  
I tired that path and it also worked. That claims to be ffmpeg built for pi?

sample flow adding local ffmpeg path:

```auto
[{"id":"91d42cf4.68948","type":"ffmpeg-spawn","z":"5967c855.68b978","name":"","outputs":2,"migrate":2e-9,"cmdPath":"/home/pi/.node-red/node_modules/@ffmpeg-installer/linux-arm/ffmpeg","cmdArgs":"[\"-version\"]","cmdOutputs":1,"killSignal":"SIGTERM","msgOutput":"split","x":444,"y":980,"wires":[[],["584da5c6.da389c"]]},{"id":"4cbb3789.6910c8","type":"inject","z":"5967c855.68b978","name":"","props":[{"p":"action","v":"{\"command\":\"start\"}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","x":271,"y":980,"wires":[["91d42cf4.68948"]]},{"id":"584da5c6.da389c","type":"function","z":"5967c855.68b978","name":"","func":"const version = msg.payload.toString().split(' ')[2];\n\nconst message = `version: ${version}`;\n\nnode.status({ fill: 'green', shape: 'dot', text: message });\n\nreturn { payload: version };","outputs":1,"noerr":0,"initialize":"","finalize":"","x":629,"y":980,"wires":[["bd1a13cf.ea256"]]},{"id":"bd1a13cf.ea256","type":"debug","z":"5967c855.68b978","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":790,"y":980,"wires":[]}]

```

ffmpeg version when using @ffmpeg-installer/ffmpeg

 ![Screen Shot 2021-04-25 at 6.54.45 AM](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/4/d/4d1addf304c877f9488c4bd3d7a1f4b6e8aa5fd1.png)

ffmpeg version when using ffmpeg-for-homebridge

 ![Screen Shot 2021-04-25 at 7.06.30 AM](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/f/9/f9f83dd1c446f9bba7d77bafbada92f503c989ae.png)

> [@SuperNinja](#):
>
> Not see `v0.4.0` ? 🤔

Thanks for checking that. mp4frag@0.4.0 is a dependency used by node-red-contrib-mp4frag. I currently was using an experimental branch to add features. You wouldnt see it in your package.json file, but it would be a dependency in the node\_modules folder.

---

<div class="post-metadata">

**Author:** ![kevinGodell](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/kevingodell/32/27040_2.png) [@kevinGodell](https://discourse.nodered.org/u/kevinGodell)\
**Post date:** [25 April 2021 14:53 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/48 "2021-04-25T14:53:33Z")

</div>

@thejollypop

Added a new feature where you can define the ffmpeg path in settings.js

Firstly, install the dependency that will have the ffmpeg that you desire.

At the top of settings.js, require the selected lib to get the path.

Add the value to ffmpegSpawn.cmdPath.

excerpt from settings.js showing where I am requiring 3 ffmpeg libs ( I tested all 3 for compatibility )

```auto
const ffmpegPath1 = require('@ffmpeg-installer/ffmpeg').path;

const ffmpegPath2 = require('ffmpeg-for-homebridge');

const ffmpegPath3 = require('ffmpeg-static');

```

Inside the modules.exports object i added the path ( trying all 3 separately ):

```auto
ffmpegSpawn: {
    //cmdPath: ffmpegPath1
    cmdPath: ffmpegPath2
    //cmdPath: ffmpegPath3
  }

```

This will now show up as the default value when adding a new ffmpeg-spawn to your editor or if you leave the path value blank in the editor.

---

<div class="post-metadata">

**Author:** ![kevinGodell](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/kevingodell/32/27040_2.png) [@kevinGodell](https://discourse.nodered.org/u/kevinGodell)\
**Post date:** [28 April 2021 01:08 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/49 "2021-04-28T01:08:00Z")

</div>

Accidentally posted this to wrong thread a minute ago. oops.

When tweaking your ffmpeg command, its always good to know what type of cpu load it is using.

Uses `top` in batch mode to get the stdout. `top -b -p <pid>`

 ![Screen Shot 2021-04-27 at 8.01.32 PM](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/2/7/27bba01ad3e5ba552a1e1fc3bd11d54b03c022ff.png)

```auto
[{"id":"fc058328.2af29","type":"exec","z":"ac290215.9a244","command":"top -b -p","addpay":true,"append":"","useSpawn":"true","timer":"","oldrc":false,"name":"","x":718,"y":153,"wires":[["b37719e3.1423b8"],[],[]]},{"id":"b37719e3.1423b8","type":"function","z":"ac290215.9a244","name":"%CPU, %MEM","func":"const { payload } = msg;\n\nif (typeof payload === 'string') {\n \n const lines = payload.toString().trim().split(/[\\n]+/);\n \n if (lines.length > 2) {\n \n const labels = lines[lines.length - 2].trim().split(/[\\s]+/);\n\n const values = lines[lines.length - 1].trim().split(/[\\s]+/);\n\n const message = `${labels[8]} ${values[8]}, ${labels[9]} ${values[9]}`;\n\n node.status({ fill: 'green', shape: 'dot', text: message });\n\n return { payload: message };\n }\n\n}\n\nnode.status({});\n\nreturn null;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":887,"y":140,"wires":[["8bbdeeb9.3f4d2"]]},{"id":"8bbdeeb9.3f4d2","type":"debug","z":"ac290215.9a244","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":1043,"y":140,"wires":[]},{"id":"a1410491.d289a8","type":"function","z":"ac290215.9a244","name":"status pid","func":"const { payload = {} } = msg;\n\nconst { status, pid } = payload;\n\nif (status === 'spawn') {\n \n return { payload: pid };\n\n \n} else if (status === 'close') {\n \n return { kill: 'SIGTERM' };\n \n}\n\nreturn null;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":573,"y":153,"wires":[["fc058328.2af29"]]}]

```

There were probably a bunch of ways to do this better, but this was the best I could come up with.

---

<div class="post-metadata">

**Author:** ![BartButenaers](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bartbutenaers/32/10476_2.png) [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Post date:** [28 April 2021 06:24 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/50 "2021-04-28T06:24:27Z")

</div>

> [@kevinGodell](#):
>
> probably a bunch of ways to do this better

A bit of advertisment for my nodes can never be harmful: [node-red-contrib-cpu](https://flows.nodered.org/node/node-red-contrib-cpu)

---

<div class="post-metadata">

**Author:** ![kevinGodell](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/kevingodell/32/27040_2.png) [@kevinGodell](https://discourse.nodered.org/u/kevinGodell)\
**Post date:** [28 April 2021 10:26 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/51 "2021-04-28T10:26:22Z")

</div>

I was actually looking at your node with intentions to use it, but didnt see an option to get an individual PID's data. Would be a nice feature, but I could not find any node.js way of getting the value and had to resort to the system command.

---

<div class="post-metadata">

**Author:** ![thejollypop](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/thejollypop/32/36597_2.png) [@thejollypop](https://discourse.nodered.org/u/thejollypop)\
**Post date:** [3 May 2021 13:08 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/52 "2021-05-03T13:08:42Z")

</div>

> [@kevinGodell](#):
>
> ```auto
> const ffmpegPath2 = require('ffmpeg-for-homebridge');
> 
> ```

Thanks @kevinGodell, now it's compatible with docker as well!

I'm running instances also on [AWS](https://nodered.org/docs/getting-started/aws#Running%20on%20AWS%20EC2%20with%20Ubuntu), and now I get the following `node-red-contrib-mp4frag` error on t4g.micro Ubuntu and/or Debian servers.  
Both `node-red-contrib-ffmpeg-spawn` and `node-red-contrib-ui-mp4frag` work fine.

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/9/a/9a47918e8d10532d60448404acb5b70c5333bcf6.png)

It's particularly strange, because the first run went well, and only then the flows stopped working. Is there anything we can do about it? 10x

---

<div class="post-metadata">

**Author:** ![kevinGodell](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/kevingodell/32/27040_2.png) [@kevinGodell](https://discourse.nodered.org/u/kevinGodell)\
**Post date:** [3 May 2021 17:21 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/53 "2021-05-03T17:21:07Z")

</div>

It’s hard to say the trouble could be. Those nodes are still experimental and have extra debugging info. Not sure what that image is showing the unhelpful error. Can you post a screenshot of the flow so I can see how things are connected.

I have an opposite problem in that I can’t make mine break. So, I am sure that we can make yours better. Personally, I have 24 live streams working through these nodes without fail.

---

<div class="post-metadata">

**Author:** ![thejollypop](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/thejollypop/32/36597_2.png) [@thejollypop](https://discourse.nodered.org/u/thejollypop)\
**Post date:** [3 May 2021 20:05 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/54 "2021-05-03T20:05:27Z")

</div>

Totally agree. I was able to fix it in Ubuntu 18.04 Version 43.0, so now it's working perfect

---

<div class="post-metadata">

**Author:** ![krambriw](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/krambriw/32/5429_2.png) [@krambriw](https://discourse.nodered.org/u/krambriw)\
**Post date:** [12 June 2021 08:30 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/55 "2021-06-12T08:30:20Z")

</div>

I have an issue with audio from a rtsp camera not working (no sound)

Using these args as configuration in the ffmpeg-spawn node:

```auto
["-loglevel","quiet","-rtsp_transport","tcp","-i","rtsp://freja.hiof.no:1935/rtplive/_definst_/hessdalen03.stream","-an","-c:v","copy","-c:a","libfdk_aac","-f","mp4","-movflags","+frag_keyframe+empty_moov+default_base_moof","-min_frag_duration","100","pipe:1"]

```

So basically trying libfdk\_aac as well as aac but no sound can be heard. If I open the url in vlc it works and the stream info is as this:

![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/f/9/f9a13012f522c3e872a1aee8254868cc1a84bd41.png)

Getting the sound from this particular camera is not so important but the principle, I like to know why it's not working 😉

---

<div class="post-metadata">

**Author:** ![krambriw](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/krambriw/32/5429_2.png) [@krambriw](https://discourse.nodered.org/u/krambriw)\
**Post date:** [12 June 2021 13:30 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/56 "2021-06-12T13:30:21Z")

</div>

Oh so stupid, I caused the problem myself...the param "-an" means .....disable audio

---

<div class="post-metadata">

**Author:** ![kevinGodell](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/kevingodell/32/27040_2.png) [@kevinGodell](https://discourse.nodered.org/u/kevinGodell)\
**Post date:** [12 June 2021 13:37 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/57 "2021-06-12T13:37:15Z")

</div>

Ha! I looked at the args and didn't even notice, either. Just curious, i played it via vlc and it is just hissing and popping. Probably has water in the mic or is simply too far from sources of sound?

---

<div class="post-metadata">

**Author:** ![krambriw](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/krambriw/32/5429_2.png) [@krambriw](https://discourse.nodered.org/u/krambriw)\
**Post date:** [12 June 2021 14:17 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/58 "2021-06-12T14:17:46Z")

</div>

I read on their homepage, the popping is coming from a Geiger counter, which detects radioactive radiation so there might be this kind of hissing generated as well

Here is some more info about the project, where it is etc  
[http://freja.hiof.no/station/](http://freja.hiof.no/station/)

---

<div class="post-metadata">

**Author:** ![thejollypop](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/thejollypop/32/36597_2.png) [@thejollypop](https://discourse.nodered.org/u/thejollypop)\
**Post date:** [15 June 2021 21:51 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/59 "2021-06-15T21:51:41Z")

</div>

I'm trying to benchmark bitrate vs H264/H265/AV1 to tweak the performance/latency.

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/c/2/c207f746a3e5da62b2122ed8043fda64c2dc69a5.jpeg)

However, the H264/H265/AV1 [test video streams](https://senkorasic.com/testmedia/) (MP4 files) work only when triggered directly to the `ui_mp4frag` node, no matter how many times I'm changing the ffmpeg parameters of the `ffmpeg-spawn` node, so I cannot get the metadata.  
Any lead to solve this is much appreciated!

Flow:

```auto
[{"id":"d4c54306.0b34c","type":"tab","label":"Flow 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","hlsJsConfig":"{\"liveDurationInfinity\":true,\"liveBackBufferLength\":5,\"maxBufferLength\":10,\"manifestLoadingTimeOut\":1000,\"manifestLoadingMaxRetry\":10,\"manifestLoadingRetryDelay\":500}","play":"true","unload":"true","threshold":0.5,"players":["socket.io","hls.js","hls","mp4"],"x":890,"y":220,"wires":[[]]},{"id":"143a363a.17fc7a","type":"inject","z":"d4c54306.0b34c","name":"stop default","props":[{"p":"action","v":"{\"command\":\"stop\"}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payloadType":"str","x":250,"y":460,"wires":[["93d74c4e.4c8fe"]]},{"id":"1d5155f9.0f929a","type":"debug","z":"d4c54306.0b34c","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":1259,"y":252,"wires":[]},{"id":"a03a1b22.1f27a8","type":"function","z":"d4c54306.0b34c","name":"errors","func":"const { payload } = msg;\n\nreturn { payload: payload.toString() };","outputs":1,"noerr":0,"initialize":"","finalize":"","x":1139,"y":252,"wires":[["1d5155f9.0f929a"]]},{"id":"22984340.c40eac","type":"function","z":"d4c54306.0b34c","name":"progress","func":"const props = msg.payload.toString().split('\\n');\n\nconst progress = {};\n\nprops.forEach(item => {\n \n const [name, value] = item.split('=');\n \n if (name && value) {\n \n progress[name] = value;\n\n }\n \n});\n\nconst color = progress['progress'] === 'continue' ? 'green' : 'red';\n\nconst message = `fps: ${progress['fps']}, bitrate: ${progress['bitrate']}`;\n\nnode.status({ fill: color, shape: 'dot', text: message });\n\nreturn { payload: progress };","outputs":1,"noerr":0,"initialize":"","finalize":"","x":900,"y":460,"wires":[["f2621888.645328","fef2614e.17d3"]]},{"id":"45912098.31d65","type":"pipe2jpeg","z":"d4c54306.0b34c","name":"","x":580,"y":600,"wires":[["e382fb4.ce83a08"]]},{"id":"e382fb4.ce83a08","type":"image","z":"d4c54306.0b34c","name":"jpeg preview","width":"400","data":"payload","dataType":"msg","thumbnail":false,"active":false,"pass":false,"outputs":0,"x":870,"y":660,"wires":[]},{"id":"8b84ea34.3465f8","type":"comment","z":"d4c54306.0b34c","name":"- - - - - progress logs - - - - -","info":"","x":1189,"y":315,"wires":[]},{"id":"e1ae8181.29ed6","type":"comment","z":"d4c54306.0b34c","name":"- - - - - error logs - - - - -","info":"","x":1197,"y":217,"wires":[]},{"id":"fd12ad4d.89379","type":"comment","z":"d4c54306.0b34c","name":"- view mp4 -","info":"","x":890,"y":180,"wires":[]},{"id":"e79ecc8d.9beb5","type":"change","z":"d4c54306.0b34c","name":"ffmpeg","rules":[{"t":"set","p":"action","pt":"msg","to":"{\t \"command\":\"start\",\t \"args\":[\t \"-loglevel\",\t \"error\",\t \"-nostats\",\t \"-f\",\t \"hls\",\t \"-http_multiple\",\t \"1\",\t \"-re\",\t \"-i\",\t \"https://weather-lh.akamaihd.net/i/twc_1@92006/index_1200_av-p.m3u8?sd=10&rebase=on\",\t \"-c:v\",\t \"copy\",\t \"-c:a\",\t \"aac\",\t \"-f\",\t \"mp4\",\t \"-movflags\",\t \"+frag_keyframe+empty_moov+default_base_moof\",\t \"pipe:1\",\t \"-progress\",\t \"pipe:3\",\t \"-f\",\t \"image2pipe\",\t \"-vf\",\t \"select='eq(pict_type,PICT_TYPE_I)',scale=trunc(iw/4):-2\",\t \"-vsync\",\t \"vfr\",\t \"pipe:4\"\t]\t}","tot":"jsonata"},{"t":"set","p":"action.args[9]","pt":"msg","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":280,"y":360,"wires":[["93d74c4e.4c8fe"]]},{"id":"347d50a4.7b51a","type":"change","z":"d4c54306.0b34c","name":"stop","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"command\":\"stop\"}","tot":"json"},{"t":"set","p":"action","pt":"msg","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":310,"y":400,"wires":[["93d74c4e.4c8fe"]]},{"id":"f2621888.645328","type":"change","z":"d4c54306.0b34c","name":"Bitrate","rules":[{"t":"set","p":"payload","pt":"msg","to":"$number($substringBefore($trim(msg.payload.bitrate), \".\"))","tot":"jsonata"},{"t":"set","p":"payload","pt":"msg","to":"msg.payload / 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```

---

<div class="post-metadata">

**Author:** ![kevinGodell](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/kevingodell/32/27040_2.png) [@kevinGodell](https://discourse.nodered.org/u/kevinGodell)\
**Post date:** [17 June 2021 10:56 UTC](https://discourse.nodered.org/t/node-red-contrib-ffmpeg-spawn/44427/60 "2021-06-17T10:56:08Z")

</div>

The best way to do a side by side comparison of bitrates would be to use the same input to create the separate outputs encoded with the different codecs. I have tried a little bit for the last couple of nights to get a working example, but the `libaom-av1` codec with ffmpeg has not been very helpful. It freezes after making a little output (it is known to be very slow).

I can guarantee than any type of mp4 video encoded with anything other than h264 will not be compatible with node-red-contrib-mp4frag at this point. I can probably make it look for other codecs, but there has been no pressing need since those others will not be playable in the browser as a live video stream using mediasource. Maybe vlc will be able to play the live stream.

I will try to get an example posted later after I get something working.

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