Change Renderer classes to RenderWorkers. Created RenderWorkerFactory.

utilities/ffmpeg_worker.py

@@ -0,0 +1,73 @@
+#! /usr/bin/python
+import re
+import time
+
+import ffmpeg
+
+from utilities.render_worker import *
+
+
+class FFMPEGRenderWorker(RenderWorker):
+
+    def version(self):
+        version = None
+        try:
+            ver_out = subprocess.check_output([self.renderer_path(), '-version']).decode('utf-8')
+            match = re.match(".*version\s*(\S+)\s*Copyright", ver_out)
+            version = match.groups()[0]
+        except Exception as e:
+            logger.error("Failed to get FFMPEG version: {}".format(e))
+        return version
+
+    renderer = 'ffmpeg'
+    render_engine = 'ffmpeg'
+
+    def __init__(self, input_path, output_path, args=None):
+        super(FFMPEGRenderWorker, self).__init__(input_path=input_path, output_path=output_path, ignore_extensions=True, args=args)
+
+        self.total_frames = -1
+        if os.path.exists(input_path):
+            media_stats = ffmpeg.probe(input_path)
+            for stream in media_stats['streams']:
+                if stream['codec_type'] == 'video':
+                    self.total_frames = stream['nb_frames']
+                    break
+
+        self.frame = 0
+
+        # Stats
+        self.current_frame = -1
+
+    def _generate_subprocess(self):
+
+        cmd = [self.renderer_path(), '-y', '-stats', '-i', self.input]
+        if self.args:
+            cmd.extend(self.args)
+        cmd.append(self.output)
+
+        return cmd
+
+    def percent_complete(self):
+        return max(float(self.current_frame) / float(self.total_frames), 0.0)
+
+    def _parse_stdout(self, line):
+        pattern = re.compile(r'frame=\s*(?P<current_frame>\d+)\s*fps.*time=(?P<time_elapsed>\S+)')
+        found = pattern.search(line)
+        if found:
+            stats = found.groupdict()
+            self.current_frame = stats['current_frame']
+            self.time_elapsed = stats['time_elapsed']
+        elif "not found" in line:
+            self.errors.append(line)
+
+
+if __name__ == '__main__':
+    logging.basicConfig(format='%(asctime)s - %(message)s', datefmt='%d-%b-%y %H:%M:%S', level=logging.INFO)
+
+    test_movie = '/Users/brettwilliams/Desktop/dark_knight_rises.mp4'
+
+    r = FFMPEGRenderWorker(test_movie, '/Users/brettwilliams/Desktop/test-ffmpeg.mp4', args=['-c:v', 'libx265', '-vtag', 'hvc1'])
+    # r = FFMPEGRenderer(test_movie, '/Users/brettwilliams/Desktop/dark_knight_rises-output.mp4')
+    r.start()
+    while r.is_running():
+        time.sleep(1)