OpenMHz Delayed Upload Script

This script monitors a directory for new .m4a audio files from TrunkRecorder and their associated .json metadata files, and uploads them to OpenMHz after a specified delay. Script was designed for calls from TrunkRecorder but with slight modification can be used with almost any service.

This was pieced together with existing scripts found on the TrunkRecorder Dicord from SaintOlav and BinarySentinel, as well as the assistance and ideas from TheGreatCodeHolio, Jodfie, and tadscottsmith. Most modifications made with ChatGPT. All this to say this is mostly molding what others have already done to fit my own needs.

Pull Requests are welcome, encouraged, and invited. I have no idea how efficient or inefficient this code is or if there's a better way to handle it

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Installation/Usage

Save the openmhz_delayed.sh and openmhz_delayed_config.json files. Edit the config file as appropriate for your system(s) and save. Edit the location for your config file in the .sh script to point to your config file. Install openmhz_delayed.sh as a service so it's constantly monitoring and you're set!

Make sure you remove any OpenMhz upload variables from your Trunk-Recorder config file to avoid duplicate uploads.

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Global Configuration

The global configuration applies to all systems unless overridden by system-specific settings.

Key	Type	Default Value	Description
globalWatchDir	String	-	The base directory where the script will look for audio files.

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System Configuration

Key	Type	Default Value	Description
systemName	String	-	The name of the system (matching trunk-recorder). Also acts as the default OpenMhz system name
shortName	String	systemName	Defaults to systemName. Only required if you have multiple systems you want to upload to one system in OpenMhz
openmhzKey	String	-	OpenMhz API Key
uploadDelay	Number	-	The delay (in seconds) before uploading a file after it is created. I've tested between 5-15 minutes successfully.
minFileAge	Number	10	The minimum age (in seconds) a file must be before it can be uploaded. (recommend 5-10 seconds if you are uploading to broadcastify or rdio within trunk-recorder)
talkgroupsToSkip	String	-	A comma-separated list of talkgroup IDs to skip during upload. (Use this for car to car or tactial groups you may want to record, but don't want uploaded.)
watchDir	String	globalWatchDir/systemName	The directory where the script will look for audio files for this system.

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Example Configuration

Here’s an example openmhz_delayed_config.json file:

{
  "globalWatchDir": "/home/ubuntu/Automations/OpenMhz/watch",
  "systems": [
    {
      "systemName": "System1",
      "shortName": "Sys1",
      "openmhzKey": "your_api_key_here",
      "uploadDelay": 60,
      "minFileAge": 10,
      "talkgroupsToSkip": "123,456",
      "watchDir": "/home/ubuntu/Automations/OpenMhz/watch/System1"
    },
    {
      "systemName": "System2",
      "openmhzKey": "your_api_key_here",
      "uploadDelay": 120,
      "minFileAge": 15
    }
  ]
}

Notes

• The script skips uploading files for talkgroups listed in talkgroupsToSkip.

• Files are moved to an _uploaded subdirectory after successful upload.

• The script retries uploading files if the initial attempt fails.

Dependencies

• jq: A lightweight and flexible command-line JSON processor.

• curl: A command-line tool for transferring data with URLs.