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<?php
namespace App\Services\Streamers;
class TranscodingStreamer extends Streamer implements TranscodingStreamerInterface
{
/**
* Bit rate the stream should be transcoded at.
*
* @var int
*/
private $bitRate;
* Time point to start transcoding from.
* @var float
private $startTime;
* On-the-fly stream the current song while transcoding.
public function stream(): void
$ffmpeg = config('koel.streaming.ffmpeg_path');
$codec = config('koel.streaming.ffmpeg_codec');
abort_unless(is_executable($ffmpeg), 500, 'Transcoding requires valid ffmpeg settings.');
//used the chart on https://en.wikipedia.org/wiki/HTML5_audio#Supported_audio_coding_formats to match up formats to container types.
$container = null;
switch($codec)
case 'libopus':
case 'libvorbis':
$container = 'ogg';
break;
case 'libmp3lame':
$container = 'mp3';
case 'aac':
$container = 'adts';
}
$bitRate = filter_var($this->bitRate, FILTER_SANITIZE_NUMBER_INT);
header('Content-Type: audio/mpeg');
header('Content-Disposition: attachment; filename="'.basename($this->song->path).'"');
$args = [
'-i '.escapeshellarg($this->song->path),
'-map 0:0',
'-v 0',
"-b:a {$bitRate}k",
"-c:a {$codec}",
"-f {$container}",
'-',
];
if ($this->startTime) {
array_unshift($args, "-ss {$this->startTime}");
passthru("$ffmpeg ".implode($args, ' '));
' '
string
array
$pieces
implode()
If this is a false-positive, you can also ignore this issue in your code via the ignore-type annotation
ignore-type
passthru("$ffmpeg ".implode($args, /** @scrutinizer ignore-type */ ' '));
public function setBitRate(int $bitRate): void
$this->bitRate = $bitRate;
public function setStartTime(float $startTime): void
$this->startTime = $startTime;
phanan /
koel
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