wp_read_audio_metadata() │ WP 3.6.0

Retrieve metadata from a audio file's ID3 tags

1 time — 0.014777 sec (extremely slow) | 50000 times — 1538.81 sec (extremely slow) | PHP 7.0.5, WP 4.5

No Hooks.

Return

Array|false. Returns array of metadata, if found.

Usage

wp_read_audio_metadata( $file );
$file(string) (required)
Path to file.

Changelog

Since 3.6.0 Introduced.

Code of wp_read_audio_metadata() WP 5.9.3

wp-admin/includes/media.php 
function wp_read_audio_metadata( $file ) {
	if ( ! file_exists( $file ) ) {
		return false;
	}

	$metadata = array();

	if ( ! defined( 'GETID3_TEMP_DIR' ) ) {
		define( 'GETID3_TEMP_DIR', get_temp_dir() );
	}

	if ( ! class_exists( 'getID3', false ) ) {
		require ABSPATH . WPINC . '/ID3/getid3.php';
	}

	$id3 = new getID3();
	// Required to get the `created_timestamp` value.
	$id3->options_audiovideo_quicktime_ReturnAtomData = true; // phpcs:ignore WordPress.NamingConventions.ValidVariableName

	$data = $id3->analyze( $file );

	if ( ! empty( $data['audio'] ) ) {
		unset( $data['audio']['streams'] );
		$metadata = $data['audio'];
	}

	if ( ! empty( $data['fileformat'] ) ) {
		$metadata['fileformat'] = $data['fileformat'];
	}

	if ( ! empty( $data['filesize'] ) ) {
		$metadata['filesize'] = (int) $data['filesize'];
	}

	if ( ! empty( $data['mime_type'] ) ) {
		$metadata['mime_type'] = $data['mime_type'];
	}

	if ( ! empty( $data['playtime_seconds'] ) ) {
		$metadata['length'] = (int) round( $data['playtime_seconds'] );
	}

	if ( ! empty( $data['playtime_string'] ) ) {
		$metadata['length_formatted'] = $data['playtime_string'];
	}

	if ( empty( $metadata['created_timestamp'] ) ) {
		$created_timestamp = wp_get_media_creation_timestamp( $data );

		if ( false !== $created_timestamp ) {
			$metadata['created_timestamp'] = $created_timestamp;
		}
	}

	wp_add_id3_tag_data( $metadata, $data );

	return $metadata;
}

Metadata (postmeta)