Add gif creator command

core/Commands/CreateImagesCommand.php

@@ -0,0 +1,80 @@
+<?php 
+
+namespace FFMpegLib\Commands;
+
+use FFMpegLib\Interfaces\CommandInterface;
+use FFMpegLib\Traits\Validation;
+use FFMpegLib\Inspectors\VideoInspector;
+use FFMpegLib\Util\Time;
+use FFMpegLib\Commands\Exceptions\VideoLengthError;
+
+class CreateImagesCommand implements CommandInterface {
+	use Validation;
+
+	protected $args;
+	protected $validation;
+	protected $imageFullPathName;
+	protected $framesCreated;
+
+	public function __construct
+		(
+		$videoFile = null,
+		$imageFullPathName = '',
+		$startPosition = '00:00:00', 
+		$endPosition = '00:00:03',
+		Time $videoDuration
+		) {
+		ffmpegInitialized();
+		$this->validation = false;
+		$this->imageFullPathName = formatImageNameFoFFMpeg($imageFullPathName);
+		$endPositionTime = Time::createFromString($endPosition);
+
+		$startPositionTime = Time::createFromString($startPosition);
+
+		if ($startPositionTime->getTimeInSeconds() > $videoDuration->getTimeInSeconds()) {
+			$startPosition = "00:00:00";
+			$startPositionTime = Time::createFromString($startPosition);
+		}
+
+		if ($endPositionTime->getTimeInSeconds() > $videoDuration->getTimeInSeconds()) {
+			throw new VideoLengthError($endPosition, $videoDuration->getFullTime());
+		}
+
+		// create an instance of inpsector
+		$videoInspector = new VideoInspector($videoFile);
+
+		// check if file is supported
+		$videoInspector->checkFile();
+
+		$secondsCombinedFromStartAndEnd = $endPositionTime->getSeconds() - $startPositionTime->getSeconds();
+
+		$MAX_FRAMES = 25;
+		$this->framesCreated = $MAX_FRAMES * $secondsCombinedFromStartAndEnd;
+
+		$this->args = [
+			'ffmpeg',
+			'-ss ' . $startPosition,
+			'-to ' . $endPosition,
+			'-i ' . $videoFile,
+			'-frames ' . $this->framesCreated,
+			$this->imageFullPathName,
+			'2>&1',
+		];
+	}
+
+	public function getCommandArgs() {
+		return implode(' ', $this->args);
+	}
+
+	public function checkOutput($output) {
+		if (!$output) {
+			$this->validation = false;
+		}
+
+		$this->validation = true;
+	}
+
+	public function framesCreated() {
+		return $this->framesCreated;
+	}
+}

core/Commands/Exceptions/NotGifFileException.php

@@ -0,0 +1,9 @@
+<?php 
+
+namespace FFMpegLib\Commands\Exceptions;
+
+class NotGifFileException extends \Exception {
+	public function __construct($file = '') {
+		parent::__construct('Please enter a file with gif extension not ' . $file);
+	}
+}

core/Commands/Exceptions/VideoLengthError.php

@@ -0,0 +1,9 @@
+<?php 
+
+namespace FFMpegLib\Commands\Exceptions;
+
+class VideoLengthError extends \Exception {
+	public function __construct($passedTime = '', $videoTime = '') {
+		parent::__construct('Passed length ' . $passedTime . ' is longer than video\'s ' . $videoTime);
+	}
+}

core/Commands/GifCommand.php

@@ -0,0 +1,44 @@
+<?php 
+
+namespace FFMpegLib\Commands;
+
+use FFMpegLib\Interfaces\CommandInterface;
+use FFMpegLib\Traits\Validation;
+use FFMpegLib\Commands\Exceptions\NotGifFileException;
+
+class GifCommand implements CommandInterface {
+	use Validation;
+
+	protected $args;
+	protected $validation;
+
+	public function __construct($imagesFirstName = 'image%d.png', $outputGifFile = 'video.gif') {
+		ffmpegInitialized();
+
+		if (!preg_match('~\.gif$~', $outputGifFile)) {
+			throw new NotGifFileException($outputGifFile);
+		}
+
+		$this->validation = false;
+		$imagesFirstName = formatImageNameFoFFMpeg($imagesFirstName);
+
+		$this->args = [
+			'ffmpeg',
+			'-i ' . $imagesFirstName,
+			$outputGifFile,
+			'2>&1',
+		];
+	}
+
+	public function getCommandArgs() {
+		return implode(' ', $this->args);
+	}
+
+	public function checkOutput($output) {
+		if (!$output) {
+			$this->validation = false;
+		}
+
+		$this->validation = true;
+	}
+}

core/Util/Time.php

@@ -13,8 +13,12 @@ class Time {
 	 * Supported time formats currently are 00:00:00
 	 * @param TimeFormatInterface $timeFormat
 	 */
-	protected function __construct(TimeFormatInterface $timeFormat) {
-		$this->timeFormat = $timeFormat;
+	protected function __construct(TimeFormatInterface $timeFormatObject = null, $timeFormat = '00:00:00') {
+		if ($timeFormatObject) {
+			$this->timeFormat = $timeFormatObject->getFormattedTime();
+		} else {
+			$this->timeFormat = $timeFormat;
+		}
 		$this->time = [];
 		$this->initializeTime();
 	}
@@ -24,8 +28,12 @@ protected function __construct(TimeFormatInterface $timeFormat) {
 	 * @param  TimeFormatInterface $timeFormat
 	 * @return new Time
 	 */
-	public static function create(TimeFormatInterface $timeFormat) {
-		return new static($timeFormat);
+	public static function create(TimeFormatInterface $timeFormatObject) {
+		return new static($timeFormatObject);
+	}
+
+	public static function createFromString($timeFormat = '00:00:00') {
+		return new static(null, $timeFormat);
 	}
 
 	public function getSeconds() {
@@ -50,7 +58,7 @@ public function getTimeInMinutes() {
 
 
 	public function getFullTime() {
-		return $this->timeFormat->getFormattedTime();
+		return $this->timeFormat;
 	}
 
 	protected function getNormalizedTime($to = 'seconds') {

core/helpers.php

@@ -6,4 +6,16 @@ function ffmpegInitialized() {
 	return Initializer::isFFMpegInitialized();
 }
 
+function formatImageNameFoFFMpeg($imageFileName = '') {
+	if (!$imageFileName) {
+		return $imageFileName;
+	}
+
+	$imageBaseDir = pathinfo($imageFileName, PATHINFO_DIRNAME);
+	$imageName = pathinfo($imageFileName, PATHINFO_FILENAME);
+	$imageExtension = pathinfo($imageFileName, PATHINFO_EXTENSION);
+
+	return $imageBaseDir . DIRECTORY_SEPARATOR . $imageName . '%d.' . $imageExtension;
+}
+
 ?>