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<?php |
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declare(strict_types=1); |
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namespace Soluble\MediaTools; |
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use Soluble\MediaTools\Config\FFMpegConfig; |
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use Soluble\MediaTools\Config\FFProbeConfig; |
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use Soluble\MediaTools\Detection\InterlacingGuess; |
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use Soluble\MediaTools\Exception\FileNotFoundException; |
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use Symfony\Component\Process\Process; |
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class VideoProbe |
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{ |
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/** @var FFProbeConfig */ |
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protected $ffprobeConfig; |
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/** @var FFMpegConfig */ |
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protected $ffmpegConfig; |
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/** @var mixed[] */ |
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protected $cache = []; |
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1 |
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public function __construct(FFProbeConfig $ffProbeConfig, FFMpegConfig $ffmpegConfig) |
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{ |
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1 |
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$this->ffprobeConfig = $ffProbeConfig; |
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1 |
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$this->ffmpegConfig = $ffmpegConfig; |
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$this->ffprobeConfig->getProcess()->ensureBinaryExists(); |
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} |
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public function getMediaInfo(string $file): VideoInfo |
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{ |
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$this->ensureFileExists($file); |
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$process = $this->ffprobeConfig->getProcess(); |
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$cmd = $process->buildCommand([ |
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'-v quiet', |
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'-print_format json', |
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'-show_format', |
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'-show_streams', |
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sprintf('-i "%s"', $file), |
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]); |
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try { |
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$jsonOutput = $process->runCommand($cmd); |
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} catch (\Throwable $e) { |
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//$msg = $e->getMessage(); |
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throw $e; |
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} |
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return VideoInfo::createFromFFProbeJson($file, $jsonOutput); |
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} |
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public function guessInterlacing(string $file, float $threshold = InterlacingGuess::INTERLACING_DETECTION_THRESHOLD, int $framesToAnalyze = 1000): InterlacingGuess |
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{ |
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$cache_key = md5(sprintf('%s:%s:%s:%s', __METHOD__, $file, $threshold, $framesToAnalyze)); |
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if (isset($this->cache[$cache_key]) && $this->cache[$cache_key] instanceof InterlacingGuess) { |
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return $this->cache[$cache_key]; |
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} |
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$nbFrames = $this->getMediaInfo($file)->getNbFrames(); |
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$analyzedFrames = ($nbFrames > 0) |
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? min($framesToAnalyze, $nbFrames) |
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: $framesToAnalyze; |
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// Step 2: Using frame detection |
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$ffmpegProcess = $this->ffmpegConfig->getProcess(); |
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$ffmpegCmd = $ffmpegProcess->buildCommand( |
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[ |
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sprintf('-i %s', escapeshellarg($file)), |
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'-filter idet', |
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sprintf('-frames:v %d', $analyzedFrames), |
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'-an', // audio can be discarded |
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'-f rawvideo', // output in raw |
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'-y /dev/null', // discard the output |
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] |
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); |
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$process = new Process($ffmpegCmd); |
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$process->mustRun(); |
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$stdErr = preg_split("/(\r\n|\n|\r)/", $process->getErrorOutput()); |
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// Counted frames |
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$interlaced_tff = 0; |
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$interlaced_bff = 0; |
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$progressive = 0; |
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$undetermined = 0; |
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$total_frames = 0; |
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if ($stdErr !== false) { |
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foreach ($stdErr as $line) { |
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if (mb_substr($line, 0, 12) !== '[Parsed_idet') { |
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continue; |
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} |
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$unspaced = preg_replace('/( )+/', '', $line); |
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$matches = []; |
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if (preg_match_all('/TFF:(\d+)BFF:(\d+)Progressive:(\d+)Undetermined:(\d+)/i', $unspaced, $matches) < 1) { |
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continue; |
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} |
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//$type = strpos(strtolower($unspaced), 'single') ? 'single' : 'multi'; |
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$interlaced_tff += (int) $matches[1][0]; |
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$interlaced_bff += (int) $matches[2][0]; |
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$progressive += (int) $matches[3][0]; |
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$undetermined += (int) $matches[4][0]; |
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$total_frames += ((int) $matches[1][0] + (int) $matches[2][0] + (int) $matches[3][0] + (int) $matches[4][0]); |
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} |
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} |
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$guess = new InterlacingGuess($interlaced_tff, $interlaced_bff, $progressive, $undetermined); |
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$this->cache[$cache_key] = $guess; |
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return $guess; |
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} |
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/** |
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* Use ffprobe to determine if a video is POTENTIALLY interlaced... |
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* Warning: |
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* - There's no absolute truth in that. but if false it's not |
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* - Very slow. |
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*/ |
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/* |
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public function isVideoPotentiallyInterlaced(string $file): bool { |
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$this->ensureFileExists($file); |
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// Step 1: ffprobe to see if interlaced |
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$cmd = $this->buildFFProbeCommand([ |
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sprintf('-i "%s"', $file), |
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'-v quiet', // do not display any messages |
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'-select_streams v', // select video stream |
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'-show_entries "frame=pkt_pts_time,pkt_duration_time,interlaced_frame"', |
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'-print_format json' |
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]); |
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$output = $this->runCommand($cmd); |
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$decoded = json_decode($output, true); |
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if ($decoded === null || $output === '') { |
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throw new JsonParseException(sprintf( |
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'Cannot parse output from ffprobe (%s)', $cmd |
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)); |
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} |
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$frame_stats = [ |
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'nb_frames' => count($decoded['frames']), |
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'nb_interlaced' => 0, |
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]; |
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foreach ($decoded['frames'] as $frame) { |
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if ((int) $frame['interlaced_frame'] === 1) { |
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$frame_stats['nb_interlaced']++; |
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} |
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} |
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if ($frame_stats['nb_interlaced'] === 0 && $frame_stats['nb_frames'] > 0) { |
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// here we know for sure it is not |
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return false; |
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} |
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return true; |
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} |
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*/ |
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protected function ensureFileExists(string $file): void |
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{ |
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if (!file_exists($file)) { |
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throw new FileNotFoundException(sprintf('File "%s" does not exists or is not readable', $file)); |
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} |
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} |
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} |
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soluble-io /
soluble-mediatools
Loading history...
Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it.
The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production.
This check looks for comments that seem to be mostly valid code and reports them.