koel/app/Http/Streamers/TranscodingStreamer.php
2016-01-31 09:00:15 -05:00

49 lines
1.4 KiB
PHP

<?php
namespace App\Http\Streamers;
use App\Models\Song;
class TranscodingStreamer extends BaseStreamer implements StreamerInterface
{
public function __construct(Song $song)
{
parent::__construct($song);
}
/**
* On-the-fly stream the current song while transcoding.
*/
public function stream()
{
if (!is_executable($ffmpeg = env('FFMPEG_PATH', '/usr/local/bin/ffmpeg'))) {
abort(500, 'Transcoding requires valid ffmpeg settings.');
}
$bitRate = filter_var(env('OUTPUT_BIT_RATE', 128), FILTER_SANITIZE_NUMBER_INT);
// Since we can't really know the content length of a file while it's still being transcoded,
// "calculating" it (like below) will be much likely to result in net::ERR_CONTENT_LENGTH_MISMATCH errors.
// Better comment these for now.
//
// header('Accept-Ranges: bytes');
// $bytes = round(($this->song->length * $bitRate * 1024) / 8);
// header("Content-Length: $bytes");
header('Content-Type: audio/mpeg');
header('Content-Disposition: attachment; filename="'.basename($this->song->path).'"');
$args = [
'-i '.escapeshellarg($this->song->path),
'-map 0:0',
'-v 0',
"-ab {$bitRate}k",
'-f mp3',
'-',
];
passthru("$ffmpeg ".implode($args, ' '));
return;
}
}