Google Cloud Speech
These samples show how to use the Google Cloud Speech API to transcribe audio files.
- It takes mp4 files as argument
- Converts it to audio in FLAC encoding (lossless encoding ) and Breaks the audio file into 10 secs clips
- transcribes each 10 sec audio file and prints the speech to text result on console.
Pre-requisite
- Setup Google Cloud Speech Project
- Install ffmpeg on your machine (linux)
Installation
Install the dependencies for this library via composer
$ cd /path/to/speech_to_text
$ composer install
Configure your project using [Application Default Credentials]
$ export GOOGLE_APPLICATION_CREDENTIALS=/path/to/credentials.json
Usage
To run the Speech Samples:
$ php speech.php
Cloud Speech
Usage:
command [options] [arguments]
Options:
-h, --help Display this help message
-q, --quiet Do not output any message
-V, --version Display this application version
--ansi Force ANSI output
--no-ansi Disable ANSI output
-n, --no-interaction Do not ask any interactive question
-v|vv|vvv, --verbose Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug
Available commands:
help Displays help for a command
list Lists commands
transcribe Transcribe an video file using Google Cloud Speech API
Help
$ php speech.php transcribe --help
Usage:
transcribe [options] [--] <video-file>
Arguments:
video-file The video file to transcribe
Options:
-l, --language=LANGUAGE The language to transcribe [default: "en-US"]
-e, --encoding=ENCODING The encoding of the audio file. This is required if the encoding is unable to be determined. [default: 2]
-b, --brand-file=BRAND-FILE The brand names for speech context to transcribe [default: "brands"]
-r, --rate-hertz=RATE-HERTZ The sample rate (in Hertz) of the supplied video [default: 48000]
-h, --help Display this help message
-q, --quiet Do not output any message
-V, --version Display this application version
--ansi Force ANSI output
--no-ansi Disable ANSI output
-n, --no-interaction Do not ask any interactive question
-v|vv|vvv, --verbose Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug
Help:
Transcribe an video file using Google Cloud Speech API
The transcribe command transcribes video from a file using the
Google Cloud Speech API.
php speech.php transcribe video_file.mp4
Just send the speech sample, send it through the speech API using the transcribe command:
php speech.php transcribe [path to audio/video file]