Trying to install 'ffprobe'

General
1

I'm trying to install 'node-red-contrib-ffprobe' on a RPi-3B and keep getting this warning message.
Has anyone managed to install this node and got it working?

I'm hoping to collect the metadata from an audio track (file on my RPi).

Thanks for reading this.

Welcome to Node-RED

22 Nov 13:56:26 - [info] Node-RED version: v1.0.2
22 Nov 13:56:26 - [info] Node.js version: v8.16.0
22 Nov 13:56:26 - [info] Linux 4.9.35-v7+ arm LE
22 Nov 13:56:27 - [info] Loading palette nodes
22 Nov 13:56:38 - [info] Worldmap version 2.1.6
22 Nov 13:56:39 - [info] Dashboard version 2.17.1 started at /ui
22 Nov 13:56:41 - [warn] ------------------------------------------------------
22 Nov 13:56:41 - [warn] [node-red-contrib-ffprobe/ffprobe] Error: Cannot find module 'ffprobe' (line:4)
22 Nov 13:56:41 - [warn] ------------------------------------------------------
22 Nov 13:56:41 - [info] Settings file : /home/pi/.node-red/settings.js
22 Nov 13:56:41 - [info] HTTP Static : /home/pi/.node-red/public
22 Nov 13:56:41 - [info] Context store : 'default' [module=memory]
22 Nov 13:56:41 - [info] User directory : /home/pi/.node-red
22 Nov 13:56:41 - [info] Server now running at http://127.0.0.1:1880/
22 Nov 13:56:41 - [info] Active project : Christmas_Project
22 Nov 13:56:41 - [info] Flows file : /home/pi/.node-red/projects/Christmas_Project/flow.json
22 Nov 13:56:41 - [info] Starting flows
22 Nov 13:56:42 - [info] Started flows

2

Did you install the prereq’s ffprobe ffprobe-static ?

3

Hello everyone,

i'm trying to extract the play-length of an mp3-file and it seems that ffprobe is the best choise for that.

The question is how is the best way to install the dependencies in docker to get them persistent in the container (even after deleting the container and recreating it later).

If i install the contrib-ffprobe package via palette manager and do

npm install ffprobe
npm install https://github.com/derhuerst/ffprobe-static

Then i can use the ffprobe node.
But after recreating the container the two required packages installed via npm are lost.

So how to get everything fine inside docker?

Thanks!

4

You have to edit the dockerfile to install the required packages.

Example dockerfile that I use:

FROM nodered/node-red:3.1.12-18

USER root

COPY ./node-red/package.json .
RUN npm install
RUN cp -R node_modules prod_node_modules

RUN apk --no-cache add imagemagick exiftool imagemagick-heic ffmpeg

COPY ./entrypoint.sh .
RUN chmod 755 entrypoint.sh

USER node-red

ENTRYPOINT ./entrypoint.sh

Note here I use apk to install the imagemagick & ffmpeg into the docker image - these are then available to Node-RED.

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