From 9bb0f00970848b97d4f688162819069329433b07 Mon Sep 17 00:00:00 2001
From: Wesnydy Ribeiro <wesnydy@lavid.ufpb.br>
Date: Fri, 3 Mar 2017 16:14:19 -0300
Subject: [PATCH] Create watemark function on renderer

---
 core/renderer.py | 43 ++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 40 insertions(+), 3 deletions(-)

diff --git a/core/renderer.py b/core/renderer.py
index 8c8f174..326320b 100755
--- a/core/renderer.py
+++ b/core/renderer.py
@@ -12,6 +12,7 @@ Author: Wesnydy Lima Ribeiro
 E-Mail: wesnydy@lavid.ufpb.br
 """
 
+import ffmpy
 import json
 import os
 import pika
@@ -68,7 +69,7 @@ def start_video_creator(id):
         [
             VIDEO_CREATOR,
             id,
-            "0",
+            "1",
             "30",
             "20",
             "25",
@@ -92,8 +93,8 @@ def start_ffmpeg(id):
         Identification of request.
     """
     global ffmpeg, display, libras_video
-    # logger.info("Starting ffmpeg")
-    libras_video = os.path.join(PATH_LIBRAS, id + ".mp4")
+    # 'vl.mp4' sufix to distinguish from video with watermark
+    libras_video = os.path.join(PATH_LIBRAS, id + "vl.mp4")
     ffmpeg = subprocess.Popen(
         [
             "ffmpeg",
@@ -162,11 +163,14 @@ def run(ch, method, properties, body):
     """
     global worker_available
 
+    print ("Rendering...")
     if worker_available:
         worker_available = False
         start_new_thread(send_to_video_creator, (properties.correlation_id, body))
         start_video_creator(properties.correlation_id)
 
+        final_video = os.path.join(PATH_LIBRAS, properties.correlation_id+".mp4")
+        watermark(libras_video, final_video, "Vídeo gerado automaticamente pelo usuário")
         try:
             filesize = os.path.getsize(libras_video)
         except:
@@ -179,12 +183,45 @@ def run(ch, method, properties, body):
 
         clean(properties.correlation_id)
         worker_available = True
+        print ("Ok")
     else:
         ch.basic_reject(delivery_tag=method.delivery_tag, requeue=True)
 
+# Post processor functions
+def watermark(input_video, output_video, text):
+    fontfile = "/usr/share/fonts/truetype/freefont/FreeSans.ttf"
+
+    filter_graph = ','.join(
+        [
+            "mpdecimate",
+            "setpts=N/FRAME_RATE/TB",
+            "drawbox=y=ih-208:color=black@0.4:width=iw:height=48:t=max",
+            "drawtext=fontfile="+fontfile+":text="+text+":fontcolor=white@0.8:fontsize=36:y=h-200:x=w/10*mod(t\,10)"
+        ]
+    )
+
+    ffmpeg = ffmpy.FFmpeg(
+        inputs = { input_video: None },
+        outputs = {
+            output_video: [
+                "-loglevel", "error",
+                "-vf", filter_graph,
+                "-ss", "0.03",
+                "-c:v", "libx264",
+                "-movflags", "+faststart",
+                "-y"
+            ]
+        }
+    )
+    try:
+        ffmpeg.run()
+    except:
+        print "FFmpeg retuned with a non-zero exit code. Watermark error."
+
 #Temporary
 def clean(id):
     # logger.info("Cleaning screens files")
+    os.remove(libras_video)
     path = os.path.join(PATH_FRAMES, id)
     rmtree(path, ignore_errors=True)
 
--
libgit2 0.21.2