Merge PPTX-to-Video converter into master

showcases/Pptx2VideoConverter/.gitignore

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+generated_frames/
+out/

showcases/Pptx2VideoConverter/pptx2video_converter.py

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+import os
+import shutil
+import subprocess
+import argparse
+
+import aspose.slides as slides
+import aspose.pydrawing as drawing
+
+
+class Pptx2VideoConverter:
+    _IMAGE_FILE_TEMPLATE = "frame_%d.png"
+
+    def __init__(self, presentation, out_video_path, temp_folder_path, fps):
+        self.presentation = presentation
+        self.out_video_path = out_video_path
+        self.temp_folder_path = temp_folder_path
+        self.fps = fps
+
+        try:
+            shutil.rmtree(self.temp_folder_path)
+        except FileNotFoundError:
+            pass
+
+        os.makedirs(self.temp_folder_path)
+        os.makedirs(os.path.dirname(self.out_video_path), exist_ok=True)
+
+    def generate_frames(self):
+        with slides.export.PresentationEnumerableFramesGenerator(self.presentation, self.fps) as frames_generator:
+            for frame_args in frames_generator.enumerate_frames(self.presentation.slides):
+                image_file_name = self._IMAGE_FILE_TEMPLATE % frame_args.frames_generator.frame_index
+                full_image_path = os.path.join(self.temp_folder_path, image_file_name)
+                frame_args.get_frame().save(full_image_path, drawing.imaging.ImageFormat.png)
+
+    def run_ffmpeg(self):
+        file_mask = os.path.join(self.temp_folder_path, self._IMAGE_FILE_TEMPLATE)
+        cmd_line = ["ffmpeg", "-loglevel", "warning", "-framerate", str(self.fps), "-i", file_mask, "-y", "-c:v", "libx264", "-pix_fmt", "yuv420p", self.out_video_path]
+        print(" ".join(cmd_line))
+        try:
+            process = subprocess.Popen(cmd_line)
+            process.wait()
+            exit_code = process.returncode
+
+            if exit_code != 0:
+                raise Exception("FFmpeg failed with exit code %d" % exit_code)
+        except FileNotFoundError:
+            print("Error: ffmpeg not found")
+
+
+def parse_command_line_arguments():
+    parser = argparse.ArgumentParser(description="Pptx2VideoConverter command line")
+    parser.add_argument('--input', '-i', type=str, help="Path to presentation", default="templates/presentation.pptx")
+    parser.add_argument('--output', '-o', type=str, help="Output file path", default="out/video.mp4")
+    parser.add_argument('--fps', '-f', type=int, help="Frames per second", default=30)
+    return parser.parse_args()
+
+
+def main():
+    try:
+        arguments = parse_command_line_arguments()
+        with slides.Presentation(arguments.input) as presentation:
+            converter = Pptx2VideoConverter(presentation, arguments.output, "generated_frames", arguments.fps)
+
+            print("Generating frames...")
+            converter.generate_frames()
+            print("Running FFmpeg to convert image sequence to video...")
+            converter.run_ffmpeg()
+            print("Done")
+    except Exception as ex:
+        print("Exception occurred:")
+        print(str(ex))
+
+
+if __name__ == "__main__":
+    main()
+else:
+    print("This script should not be imported!")