adding spokesperson chromakey example

Author: sharapov-outsource

.gitignore

@@ -1,11 +1,13 @@
 .idea
 vendor
 composer.lock
-examples/source
-examples/output
-!examples/output/.gitkeep
-examples/ffmpeg-20170915-6743351-win64-static
 data/tmp/*
-!data/tmp/.gitkeep
 data/logs/*
-!data/logs/.gitkeep
+!data/logs/.gitkeep
+!data/tmp/.gitkeep
+examples/output
+examples/tests/*
+examples/data/logs/*
+examples/ffmpeg-20170915-6743351-win64-static
+!examples/data/logs/.gitkeep
+!examples/output/.gitkeep

examples/alphakey-spokesperson.php

@@ -0,0 +1,74 @@
+<?php
+/**
+ * This file is part of PHP-FFmpeg-Extensions library.
+ * (c) Alexander Sharapov <alexander@sharapov.biz>
+ * http://sharapov.biz/
+ */
+
+use \Sharapov\FFMpegExtensions\Input\File as InputFile;
+use \Sharapov\FFMpegExtensions\Filters\Video\FilterComplexOptions;
+use \Sharapov\FFMpegExtensions\Coordinate;
+use \Alchemy\BinaryDriver\Exception\ExecutionFailureException;
+
+require_once 'init.php';
+
+// Open source video
+$video = $ffmpeg->open(new InputFile('source/spokesperson-alpha.mov'));
+
+// Initiate complex filter options collection
+$options = new FilterComplexOptions\OptionsCollection();
+
+// Create alphakey option
+$alphaKey = new FilterComplexOptions\OptionAlphakey();
+$alphaKey
+    // Set input stream for alphakey
+    ->setExtraInputStream(new InputFile('source/demo_video_720p_HD.mp4'))
+    ->setDimensions(new Coordinate\Dimension(1280, 720))
+    // Set video alphakey background duration to meet the main video duration
+    ->setDuration(new Coordinate\Duration($video->getStreamDuration()));
+
+$options
+    ->add($alphaKey);
+
+// Pass option to the options collection
+$options
+    ->add(((new FilterComplexOptions\OptionDrawText())
+        // Set z-index property. Greater value is always in front
+        ->setZIndex(160)
+        // You can use fade-in and fade-out effects. Set time in seconds
+        ->setFadeIn(1)
+        ->setFadeOut(1)
+        // Set font path
+        ->setFontFile(new InputFile('source/arial.ttf'))
+        // Set font color. Accepts transparency value as the second argument. Float value between 0 and 1.
+        ->setFontColor('ffffff')
+        // Set font size in pixels
+        ->setFontSize(33)
+        // Set text string
+        ->setText('Spokesperson chromakey demonstration')
+        // Coordinates where the text should be rendered. Accepts positive integer or
+        // constants "(w-tw)/2", "(h-th)/2" to handle auto-horizontal, auto-vertical values
+        ->setCoordinates(new Coordinate\Point(Coordinate\Point::AUTO_HORIZONTAL, 50))
+        // Set timings (start, stop) in seconds. Accepts float values as well
+        ->setTimeLine(new Coordinate\TimeLine(1, 6))
+        // Set bounding box
+        ->setBoundingBox('000000', 10, 0.5)));
+
+// Apply filter options to video
+$video
+    ->filters()
+    ->complex($options);
+
+// Run render
+$format = new \FFMpeg\Format\Video\X264('libmp3lame');
+$format->on('progress', function($video, $format, $percentage) {
+  echo "$percentage% transcoded\n";
+});
+
+try {
+  $video
+      ->save($format, 'output/output.mp4');
+  print 'Done!';
+} catch (ExecutionFailureException $e) {
+  print $e->getMessage();
+}