feat(pose_estimation): support multiprocessing videos_to_poses (#130)

* feat(pose_estimation): support multiprocessing videos_to_poses

* review: use tqdm process_map

src/python/pose_format/bin/directory.py

@@ -4,6 +4,10 @@
 from typing import List
 import logging
 from tqdm import tqdm
+from tqdm.contrib.concurrent import process_map
+import psutil
+import os
+from functools import partial
 
 # Note: untested other than .mp4. Support for .webm may have issues: https://github.com/sign-language-processing/pose/pull/126
 SUPPORTED_VIDEO_FORMATS = [".mp4", ".mov", ".avi", ".mkv", ".flv", ".wmv", ".webm"]
@@ -79,6 +83,22 @@ def get_corresponding_pose_path(video_path: Path, keep_video_suffixes: bool = Fa
     return video_path.with_suffix(".pose")
 
 
+def process_video(keep_video_suffixes: bool, pose_format: str, additional_config: dict, vid_path: Path) -> bool:
+    print(f'Estimating {vid_path} on CPU {psutil.Process().cpu_num()}')
+
+    try:
+        pose_path = get_corresponding_pose_path(video_path=vid_path, keep_video_suffixes=keep_video_suffixes)
+        if pose_path.is_file():
+            print(f"Skipping {vid_path}, corresponding .pose file already created.")
+        else:
+            pose_video(vid_path, pose_path, pose_format, additional_config, progress=False)
+            return True
+
+    except ValueError as e:
+        print(f"ValueError on {vid_path}")
+        logging.exception(e)
+
+
 def main():
     parser = argparse.ArgumentParser()
     parser.add_argument(
@@ -114,6 +134,13 @@ def main():
         default=SUPPORTED_VIDEO_FORMATS,
         help="Video extensions to search for. Defaults to searching for all supported.",
     )
+    parser.add_argument(
+        "--num-workers", 
+        type=int, 
+        default=1, 
+        help="Number of multiprocessing workers.", 
+        required=False
+    )
     parser.add_argument(
         "--additional-config",
         type=str,
@@ -144,15 +171,14 @@ def main():
 
     pose_with_no_errors_count = 0
 
-    for vid_path in tqdm(videos_with_missing_pose_files):
-        try:
-            pose_path = get_corresponding_pose_path(video_path=vid_path, keep_video_suffixes=args.keep_video_suffixes)
-            if pose_path.is_file():
-                print(f"Skipping {vid_path}, corresponding .pose file already created.")
-                continue
-            pose_video(vid_path, pose_path, args.format, additional_config)
+    if args.num_workers == 1:
+        print('Process sequentially ...')
+    else:
+        print(f'Multiprocessing with {args.num_workers} workers on {len(os.sched_getaffinity(0))} available CPUs ...')
+
+    func = partial(process_video, args.keep_video_suffixes, args.format, additional_config)
+    for success in process_map(func, videos_with_missing_pose_files, max_workers=args.num_workers):
+        if success:
             pose_with_no_errors_count += 1
-        except ValueError as e:
-            print(f"ValueError on {vid_path}")
-            logging.exception(e)
+
     print(f"Successfully created pose files for {pose_with_no_errors_count}/{len(videos_with_missing_pose_files)} video files")

src/python/pose_format/bin/pose_estimation.py

@@ -15,7 +15,7 @@ def load_video_frames(cap: cv2.VideoCapture):
     cap.release()
 
 
-def pose_video(input_path: str, output_path: str, format: str, additional_config: dict):
+def pose_video(input_path: str, output_path: str, format: str, additional_config: dict = {'model_complexity': 1}, progress: bool = True):
     # Load video frames
     print('Loading video ...')
     cap = cv2.VideoCapture(input_path)
@@ -27,13 +27,12 @@ def pose_video(input_path: str, output_path: str, format: str, additional_config
     # Perform pose estimation
     print('Estimating pose ...')
     if format == 'mediapipe':
-        additional_holistic_config = {'model_complexity': 1} | additional_config
         pose = load_holistic(frames,
                              fps=fps,
                              width=width,
                              height=height,
-                             progress=True,
-                             additional_holistic_config=additional_holistic_config)
+                             progress=progress,
+                             additional_holistic_config=additional_config)
     else:
         raise NotImplementedError('Pose format not supported')