Replace multiprocessing.Pool with sequential execution for ZeroGPU compatibility

emage_utils/fast_render.py

@@ -177,20 +177,17 @@ def distribute_frames_no_gt(frames, vertices_all):
 
 def generate_silent_videos(frames, vertices_all, vertices1_all, faces, output_dir):
     ids, verts = distribute_frames(frames, vertices_all, vertices1_all)
-    with multiprocessing.Pool(args['render_concurrent_num']) as pool:
-        pool.starmap(sub_process_process_frame, [
-            (
-                i, 
-                args['render_video_width'],
-                args['render_video_height'],
-                args['render_tmp_img_filetype'],
-                ids[i],
-                verts[i],
-                faces,
-                output_dir
-            )
-            for i in range(args['render_concurrent_num'])
-        ])
+    for i in range(args['render_concurrent_num']):
+        sub_process_process_frame(
+            i, 
+            args['render_video_width'],
+            args['render_video_height'],
+            args['render_tmp_img_filetype'],
+            ids[i],
+            verts[i],
+            faces,
+            output_dir
+        )
     out_file = os.path.join(output_dir, "silence_video.mp4")
     convert_img_to_mp4(os.path.join(output_dir, f"frame_%d.{args['render_tmp_img_filetype']}"), out_file, args['render_video_fps'])
     for fn in glob.glob(os.path.join(output_dir, f"*.{args['render_tmp_img_filetype']}")):
@@ -199,20 +196,17 @@ def generate_silent_videos(frames, vertices_all, vertices1_all, faces, output_di
 
 def generate_silent_videos_no_gt(frames, vertices_all, faces, output_dir):
     ids, verts = distribute_frames_no_gt(frames, vertices_all)
-    with multiprocessing.Pool(args['render_concurrent_num']) as pool:
-        pool.starmap(sub_process_process_frame_no_gt, [
-            (
-                i, 
-                args['render_video_width'],
-                args['render_video_height'],
-                args['render_tmp_img_filetype'],
-                ids[i],
-                verts[i],
-                faces,
-                output_dir
-            )
-            for i in range(args['render_concurrent_num'])
-        ])
+    for i in range(args['render_concurrent_num']):
+        sub_process_process_frame_no_gt(
+            i, 
+            args['render_video_width'],
+            args['render_video_height'],
+            args['render_tmp_img_filetype'],
+            ids[i],
+            verts[i],
+            faces,
+            output_dir
+        )
     out_file = os.path.join(output_dir, "silence_video.mp4")
     convert_img_to_mp4(os.path.join(output_dir, f"frame_%d.{args['render_tmp_img_filetype']}"), out_file, args['render_video_fps'])
     for fn in glob.glob(os.path.join(output_dir, f"*.{args['render_tmp_img_filetype']}")):