Fix aggregate (num_frames, dataset_from_index, index)

src/lerobot/datasets/aggregate.py

@@ -47,9 +47,10 @@ def validate_all_metadata(all_metadata: list[LeRobotDatasetMetadata]):
     return fps, robot_type, features
 
 
-def update_episode_and_task(df, episode_index_to_add, old_tasks, new_tasks):
+def update_episode_frame_task(df, episode_index_to_add, old_tasks, new_tasks, frame_index_to_add):
     def _update(row):
         row["episode_index"] = row["episode_index"] + episode_index_to_add
+        row["index"] = row["index"] + frame_index_to_add
         task = old_tasks.iloc[row["task_index"]].name
         row["task_index"] = new_tasks.loc[task].task_index.item()
         return row
@@ -150,8 +151,10 @@ def aggregate_datasets(repo_ids: list[str], aggr_repo_id: str, roots: list[Path]
             aggr_path = aggr_root / DEFAULT_EPISODES_PATH.format(
                 chunk_index=aggr_meta_chunk_idx, file_index=aggr_meta_file_idx
             )
-
+            if not aggr_path.exists():
-            if aggr_path.exists():
+                aggr_path.parent.mkdir(parents=True, exist_ok=True)
+                df.to_parquet(aggr_path)
+            else:
                 size_in_mb = get_parquet_file_size_in_mb(path)
                 aggr_size_in_mb = get_parquet_file_size_in_mb(aggr_path)
 
@@ -160,12 +163,15 @@ def aggregate_datasets(repo_ids: list[str], aggr_repo_id: str, roots: list[Path]
                     aggr_meta_chunk_idx, aggr_meta_file_idx = update_chunk_file_indices(
                         aggr_meta_chunk_idx, aggr_meta_file_idx, DEFAULT_CHUNK_SIZE
                     )
+                    aggr_path = aggr_root / DEFAULT_EPISODES_PATH.format(
+                        chunk_index=aggr_meta_chunk_idx, file_index=aggr_meta_file_idx
+                    )
+                    aggr_path.parent.mkdir(parents=True, exist_ok=True)
+                    df.to_parquet(aggr_path)
                 else:
                     # Update the existing parquet file with new rows
                     aggr_df = pd.read_parquet(aggr_path)
                     df = pd.concat([aggr_df, df], ignore_index=True)
-
-            aggr_path.parent.mkdir(parents=True, exist_ok=True)
                     df.to_parquet(aggr_path)
 
         # Aggregate videos if any
@@ -187,7 +193,11 @@ def aggregate_datasets(repo_ids: list[str], aggr_repo_id: str, roots: list[Path]
                     chunk_index=aggr_videos_chunk_idx[key],
                     file_index=aggr_videos_file_idx[key],
                 )
-                if aggr_path.exists():
+                if not aggr_path.exists():
+                    # First video
+                    aggr_path.parent.mkdir(parents=True, exist_ok=True)
+                    shutil.copy(str(path), str(aggr_path))
+                else:
                     size_in_mb = get_video_size_in_mb(path)
                     aggr_size_in_mb = get_video_size_in_mb(aggr_path)
 
@@ -196,6 +206,13 @@ def aggregate_datasets(repo_ids: list[str], aggr_repo_id: str, roots: list[Path]
                         aggr_videos_chunk_idx[key], aggr_videos_file_idx[key] = update_chunk_file_indices(
                             aggr_videos_chunk_idx[key], aggr_videos_file_idx[key], DEFAULT_CHUNK_SIZE
                         )
+                        aggr_path = aggr_root / DEFAULT_VIDEO_PATH.format(
+                            video_key=key,
+                            chunk_index=aggr_videos_chunk_idx[key],
+                            file_index=aggr_videos_file_idx[key],
+                        )
+                        aggr_path.parent.mkdir(parents=True, exist_ok=True)
+                        shutil.copy(str(path), str(aggr_path))
                     else:
                         # Update the existing parquet file with new rows
                         concat_video_files(
@@ -205,10 +222,6 @@ def aggregate_datasets(repo_ids: list[str], aggr_repo_id: str, roots: list[Path]
                             aggr_videos_chunk_idx[key],
                             aggr_videos_file_idx[key],
                         )
-                else:
-                    aggr_path.parent.mkdir(parents=True, exist_ok=True)
-                    shutil.copy(str(path), str(aggr_path))
-
                     # copy_command = f"cp {video_path} {aggr_video_path} &"
                     # subprocess.Popen(copy_command, shell=True)
 
@@ -220,13 +233,15 @@ def aggregate_datasets(repo_ids: list[str], aggr_repo_id: str, roots: list[Path]
         for chunk_idx, file_idx in data_chunk_file_ids:
             path = meta.root / DEFAULT_DATA_PATH.format(chunk_index=chunk_idx, file_index=file_idx)
             df = pd.read_parquet(path)
-            # TODO(rcadene): update frame index
+            df = update_episode_frame_task(df, num_episodes, meta.tasks, aggr_meta.tasks, num_frames)
-            df = update_episode_and_task(df, num_episodes, meta.tasks, aggr_meta.tasks)
 
             aggr_path = aggr_root / DEFAULT_DATA_PATH.format(
                 chunk_index=aggr_data_chunk_idx, file_index=aggr_data_file_idx
             )
-            if aggr_path.exists():
+            if not aggr_path.exists():
+                aggr_path.parent.mkdir(parents=True, exist_ok=True)
+                df.to_parquet(aggr_path)
+            else:
                 size_in_mb = get_parquet_file_size_in_mb(path)
                 aggr_size_in_mb = get_parquet_file_size_in_mb(aggr_path)
 
@@ -235,12 +250,15 @@ def aggregate_datasets(repo_ids: list[str], aggr_repo_id: str, roots: list[Path]
                     aggr_data_chunk_idx, aggr_data_file_idx = update_chunk_file_indices(
                         aggr_data_chunk_idx, aggr_data_file_idx, DEFAULT_CHUNK_SIZE
                     )
+                    aggr_path = aggr_root / DEFAULT_DATA_PATH.format(
+                        chunk_index=aggr_data_chunk_idx, file_index=aggr_data_file_idx
+                    )
+                    aggr_path.parent.mkdir(parents=True, exist_ok=True)
+                    df.to_parquet(aggr_path)
                 else:
                     # Update the existing parquet file with new rows
                     aggr_df = pd.read_parquet(aggr_path)
                     df = pd.concat([aggr_df, df], ignore_index=True)
-
-            aggr_path.parent.mkdir(parents=True, exist_ok=True)
                     df.to_parquet(aggr_path)
 
         num_episodes += meta.total_episodes