More code re-organizing

src/engines/ffmpeg/ffmpeg_worker.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+import re
+import subprocess
+
+from src.engines.core.base_worker import BaseRenderWorker
+from src.engines.ffmpeg.ffmpeg_engine import FFMPEG
+
+
+class FFMPEGRenderWorker(BaseRenderWorker):
+
+    engine = FFMPEG
+
+    def __init__(self, input_path, output_path, args=None, parent=None, name=None):
+        super(FFMPEGRenderWorker, self).__init__(input_path=input_path, output_path=output_path, args=args,
+                                                 parent=parent, name=name)
+
+        stream_info = subprocess.check_output([self.renderer_path, "-i",  # https://stackoverflow.com/a/61604105
+                                               input_path, "-map", "0:v:0", "-c", "copy", "-f", "null", "-y",
+                                                     "/dev/null"], stderr=subprocess.STDOUT).decode('utf-8')
+        found_frames = re.findall('frame=\s*(\d+)', stream_info)
+        self.project_length = found_frames[-1] if found_frames else '-1'
+        self.current_frame = -1
+
+    def generate_worker_subprocess(self):
+
+        cmd = [self.engine.default_renderer_path(), '-y', '-stats', '-i', self.input_path]
+
+        # Resize frame
+        if self.args.get('x_resolution', None) and self.args.get('y_resolution', None):
+            cmd.extend(['-vf', f"scale={self.args['x_resolution']}:{self.args['y_resolution']}"])
+
+        # Convert raw args from string if available
+        raw_args = self.args.get('raw', None)
+        if raw_args:
+            cmd.extend(raw_args.split(' '))
+
+        # Close with output path
+        cmd.append(self.output_path)
+        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']
+            time_elapsed = stats['time_elapsed']
+        elif "not found" in line:
+            self.log_error(line)