naonaoyh/broadcast-fingerprint-monitor

Scan for an audio fingerprint within an audio stream.

Broadcast fingerprint monitor

A small C++ program to monitor a radio stream if a specific track or ad is played. It's using gstreamer to pull in the PCM data and echoprint-codegen for fingerprinting.

To use, first build a fingerprint of what you want to scan for: monitor build file:///path/to/file.mp3 This will create a ref_fingerprint.dat in your pwd. Then just run this to start scanning a radio channel monitor scan "http://url-to.com/livestream.mp4" streamid commandtorunwhenfound

Notes:

• You'll probably want to modify the buffersize (buffer that is matched to the audio fingerpint), updaterate (how often the fingerprints are compared) and minimum_rate (how many codes need to match at a minimum to match)
• I am currently only using the codes, not the frames from echoprint. Accuracy can be increased by using the frames and alignment as well.
• Echoprint has been slightly modified to not compress the fingerprints since that is not needed for my use case. You can find this fork here.

Todo:

• Log the PCM data buffer when a match has been found for diagnostics