Performance Tuning. FIXME: Video component frames are rendered out of order. Video component creates a severe performance bottleneck.

components/video.py

@@ -36,8 +36,6 @@ class Component(__base__.Component):
             frame = Image.new("RGBA", (self.width, self.height), (0, 0, 0, 0))
             if frame1:
                 im = Image.open(frame1)
-                self.realSize = im.size
-                im = self.resize(im)
                 frame.paste(im)
             if not self.working:
                 self.staticFrame = frame
@@ -61,11 +59,9 @@ class Component(__base__.Component):
             return self.staticFrame
             
         # make a new frame
-        width, height = self.realSize
+        width = self.width
-        image = numpy.fromstring(byteFrame, dtype='uint8')
+        height = self.height
-        image = image.reshape((width, height, 4))
+        image = Image.frombytes('RGBA', (width, height), byteFrame)
-        image = Image.frombytes('RGBA', (width, height), image, 'raw', 'RGBa')
-        image = self.resize(image)
         self.staticFrame = image
         return self.staticFrame
 
@@ -80,7 +76,7 @@ class Component(__base__.Component):
     def pickVideo(self):
         imgDir = self.settings.value("backgroundDir", os.path.expanduser("~"))
         filename = QtGui.QFileDialog.getOpenFileName(self.page,
-            "Choose Video", imgDir, "Video Files (*.mp4)")
+            "Choose Video", imgDir, "Video Files (*.mp4 *.mov)")
         if filename: 
             self.settings.setValue("backgroundDir", os.path.dirname(filename))
             self.page.lineEdit_video.setText(filename)
@@ -97,10 +93,11 @@ class Component(__base__.Component):
         
         # get a preview frame
         subprocess.call( \
-         '%s -i "%s" -y %s "%s"' % ( \
+         '%s -i "%s" -y %s %s "%s"' % ( \
             self.parent.core.FFMPEG_BIN,
             self.videoPath,
             '-ss 10 -vframes 1',
+            '-filter:v scale='+str(self.width)+':'+str(self.height),
             os.path.join(self.parent.core.tempDir, filename)
          ),
          shell=True
@@ -114,16 +111,18 @@ class Component(__base__.Component):
         
         command = [
             self.parent.core.FFMPEG_BIN,
+            '-thread_queue_size', '512',
             '-i', self.videoPath,
             '-f', 'image2pipe',
             '-pix_fmt', 'rgba',
+            '-filter:v', 'scale='+str(self.width)+':'+str(self.height),
             '-vcodec', 'rawvideo', '-',
         ]
         
         # pipe in video frames from ffmpeg
         in_pipe = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL, bufsize=10**8)
-        width, height = self.realSize
+        #width, height = self.realSize
-        self.chunkSize = 4*width*height
+        self.chunkSize = 4*self.width*self.height
 
         return in_pipe
 

main.py

@@ -243,7 +243,7 @@ class Main(QtCore.QObject):
     inputDir = self.settings.value("inputDir", expanduser("~"))
 
     fileName = QtGui.QFileDialog.getOpenFileName(self.window,
-       "Open Music File", inputDir, "Music Files (*.mp3 *.wav *.ogg *.flac)");
+       "Open Music File", inputDir, "Music Files (*.mp3 *.wav *.ogg *.fla *.aac)");
 
     if not fileName == "": 
       self.settings.setValue("inputDir", os.path.dirname(fileName))
@@ -253,7 +253,7 @@ class Main(QtCore.QObject):
     outputDir = self.settings.value("outputDir", expanduser("~"))
 
     fileName = QtGui.QFileDialog.getSaveFileName(self.window,
-       "Set Output Video File", outputDir, "Video Files (*.mkv *.mp4)");
+       "Set Output Video File", outputDir, "Video Files (*.mp4 *.mov *.mkv *.avi *.webm *.flv)");
 
     if not fileName == "": 
       self.settings.setValue("outputDir", os.path.dirname(fileName))

video_thread.py

@@ -37,20 +37,19 @@ class Worker(QtCore.QObject):
     def renderNode(self):
         while not self.stopped:
             i = self.compositeQueue.get()
-
+            frame = None
-            frame = Image.new(
-                "RGBA",
-                (self.width, self.height),
-                (0, 0, 0, 0)
-            )
 
             for compNo, comp in reversed(list(enumerate(self.components))):
                 if compNo in self.staticComponents and self.staticComponents[compNo] != None:
-                    frame = Image.alpha_composite(frame, self.staticComponents[compNo])
+                    if frame is None:
+                        frame = self.staticComponents[compNo]
+                    else:
+                        frame = Image.alpha_composite(frame, self.staticComponents[compNo])
                 else:
-                    frame = Image.alpha_composite(frame, comp.frameRender(compNo, i[0], i[1]))
+                    if frame is None:
-
+                        frame = comp.frameRender(compNo, i[0], i[1])
-                # frame.paste(compFrame, mask=compFrame)
+                    else:
+                        frame = Image.alpha_composite(frame, comp.frameRender(compNo, i[0], i[1]))
 
             self.renderQueue.put([i[0], frame])
             self.compositeQueue.task_done()
@@ -98,6 +97,7 @@ class Worker(QtCore.QObject):
 
         ffmpegCommand = [
             self.core.FFMPEG_BIN,
+            '-thread_queue_size', '512',
             '-y',  # (optional) means overwrite the output file if it already exists.
             '-f', 'rawvideo',
             '-vcodec', 'rawvideo',