From 1643aa5138efda27348407bbd0efbd2bc37702e7 Mon Sep 17 00:00:00 2001
From: Matt Tomasov <matthewjt@gmail.com>
Date: Wed, 29 Nov 2017 06:27:23 -0500
Subject: [PATCH] Added -filter_complex argument filter to FFmpeg  Stream
 Builder

Resolved error in ExamplesTest
---
 .../ffmpeg/builder/AbstractFFmpegStreamBuilder.java   | 11 +++++++++++
 src/test/java/net/bramp/ffmpeg/ExamplesTest.java      |  2 +-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/main/java/net/bramp/ffmpeg/builder/AbstractFFmpegStreamBuilder.java b/src/main/java/net/bramp/ffmpeg/builder/AbstractFFmpegStreamBuilder.java
index a1eb0547..c1d47321 100644
--- a/src/main/java/net/bramp/ffmpeg/builder/AbstractFFmpegStreamBuilder.java
+++ b/src/main/java/net/bramp/ffmpeg/builder/AbstractFFmpegStreamBuilder.java
@@ -91,6 +91,7 @@ public abstract class AbstractFFmpegStreamBuilder<T extends AbstractFFmpegStream
   public String video_movflags;
   public Integer video_frames;
   public String video_pixel_format;
+  public String video_filter_complex;
 
   public boolean subtitle_enabled = true;
   public String subtitle_preset;
@@ -224,6 +225,12 @@ public T setVideoMovFlags(String movflags) {
     return getThis();
   }
 
+  public T setComplexVideoFilter(String filter) {
+    this.video_enabled = true;
+    this.video_filter_complex = checkNotEmpty(filter, "complex video filter must not be empty");
+    return getThis();
+  }
+
   /**
    * Sets the video's frame rate
    *
@@ -679,5 +686,9 @@ protected void addVideoFlags(FFmpegBuilder parent, ImmutableList.Builder<String>
     if (video_frame_rate != null) {
       args.add("-r", video_frame_rate.toString());
     }
+
+    if (!Strings.isNullOrEmpty(video_filter_complex)) {
+      args.add("-filter_complex", video_filter_complex);
+    }
   }
 }
diff --git a/src/test/java/net/bramp/ffmpeg/ExamplesTest.java b/src/test/java/net/bramp/ffmpeg/ExamplesTest.java
index d3b8035f..66ab0f98 100644
--- a/src/test/java/net/bramp/ffmpeg/ExamplesTest.java
+++ b/src/test/java/net/bramp/ffmpeg/ExamplesTest.java
@@ -237,7 +237,7 @@ public void testExample8() throws IOException {
 
   // Convert a stereo mp3 into two mono tracks.
   @Test
-  public void testExample8() throws IOException {
+  public void testExample9() throws IOException {
     FFmpegBuilder builder = new FFmpegBuilder()
       .setVerbosity(FFmpegBuilder.Verbosity.DEBUG)
       .setInput("input.mp3")