diff --git a/examples/port_datasets/slurm_mirror_dataset.py b/examples/port_datasets/slurm_mirror_dataset.py
new file mode 100644
index 000000000..6eb3578f7
--- /dev/null
+++ b/examples/port_datasets/slurm_mirror_dataset.py
@@ -0,0 +1,444 @@
+#!/usr/bin/env python
+
+# Copyright 2025 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Mirror a bimanual robot dataset using SLURM for distributed video processing.
+
+This script creates a mirrored version of a dataset where:
+1. Left and right arm observations/actions are swapped
+2. Joint values are inverted according to a mirroring mask
+3. Video frames are horizontally flipped (parallelized via SLURM)
+
+Example usage:
+```shell
+# SLURM execution
+python examples/port_datasets/slurm_mirror_dataset.py \
+    --repo-id pepijn/openarm_bimanual \
+    --output-repo-id pepijn/openarm_bimanual_mirrored \
+    --logs-dir /fsx/user/logs \
+    --partition hopper-cpu
+
+# Local execution (for debugging)
+python examples/port_datasets/slurm_mirror_dataset.py \
+    --repo-id pepijn/openarm_bimanual \
+    --output-repo-id pepijn/openarm_bimanual_mirrored \
+    --slurm 0
+```
+"""
+
+import argparse
+import json
+import logging
+import subprocess
+from pathlib import Path
+
+import numpy as np
+import pandas as pd
+from datatrove.executor import LocalPipelineExecutor
+from datatrove.executor.slurm import SlurmPipelineExecutor
+from datatrove.pipeline.base import PipelineStep
+
+logger = logging.getLogger(__name__)
+
+OPENARM_MIRRORING_MASK = {
+    "joint_1": -1,
+    "joint_2": -1,
+    "joint_3": -1,
+    "joint_4": 1,
+    "joint_5": -1,
+    "joint_6": -1,
+    "joint_7": -1,
+    "gripper": 1,
+}
+
+
+def get_mirroring_mask(robot_type: str) -> dict[str, int]:
+    if robot_type in ["bi_openarm_follower", "openarm_follower", "bi_openarms_follower", "openarms_follower"]:
+        return OPENARM_MIRRORING_MASK
+    raise ValueError(f"Unknown robot type: {robot_type}. Add a mirroring mask for this robot.")
+
+
+def swap_left_right_name(name: str) -> str:
+    result = name.replace("left_", "LEFT_PLACEHOLDER_")
+    result = result.replace("right_", "left_")
+    result = result.replace("LEFT_PLACEHOLDER_", "right_")
+    return result
+
+
+def mirror_feature_names(names: list[str]) -> tuple[list[str], dict[int, int]]:
+    mirrored_names = [swap_left_right_name(n) for n in names]
+    old_to_new_idx = {}
+    for old_idx, old_name in enumerate(names):
+        new_name = swap_left_right_name(old_name)
+        new_idx = mirrored_names.index(new_name)
+        old_to_new_idx[old_idx] = new_idx
+    return mirrored_names, old_to_new_idx
+
+
+def apply_mirroring_mask(value: float, feature_name: str, mirroring_mask: dict[str, int]) -> float:
+    name_without_prefix = feature_name.split("_", 1)[1] if "_" in feature_name else feature_name
+    joint_name = name_without_prefix.split(".")[0]
+    if joint_name in mirroring_mask:
+        return value * mirroring_mask[joint_name]
+    return value
+
+
+def mirror_array(array: np.ndarray, names: list[str], mirroring_mask: dict[str, int]) -> np.ndarray:
+    mirrored_names, idx_mapping = mirror_feature_names(names)
+    result = np.zeros_like(array)
+    for old_idx, new_idx in idx_mapping.items():
+        new_name = mirrored_names[new_idx]
+        value = array[old_idx]
+        mirrored_value = apply_mirroring_mask(value, new_name, mirroring_mask)
+        result[new_idx] = mirrored_value
+    return result
+
+
+def flip_video_frames(input_path: Path, output_path: Path, fps: float, vcodec: str = "libsvtav1"):
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+    cmd = [
+        "ffmpeg", "-y", "-i", str(input_path),
+        "-vf", "hflip",
+        "-c:v", vcodec,
+        "-g", "2",
+        "-crf", "30",
+        "-r", str(int(fps)),
+        "-pix_fmt", "yuv420p",
+        "-loglevel", "error",
+    ]
+    if vcodec == "libsvtav1":
+        cmd.extend(["-preset", "12"])
+    cmd.append(str(output_path))
+    result = subprocess.run(cmd, capture_output=True, text=True)
+    if result.returncode != 0:
+        raise RuntimeError(f"FFmpeg failed: {result.stderr}")
+
+
+def video_is_valid(path: Path) -> bool:
+    """Check if a video file exists and is valid."""
+    if not path.exists():
+        return False
+    try:
+        result = subprocess.run(
+            ["ffprobe", "-v", "error", "-select_streams", "v:0",
+             "-show_entries", "stream=nb_frames", "-of", "csv=p=0", str(path)],
+            capture_output=True, text=True, timeout=30
+        )
+        return result.returncode == 0 and result.stdout.strip().isdigit()
+    except Exception:
+        return False
+
+
+class MirrorVideos(PipelineStep):
+    """Pipeline step that mirrors video files for assigned episodes."""
+    
+    def __init__(
+        self,
+        repo_id: str,
+        output_repo_id: str,
+        root: str | None = None,
+        output_root: str | None = None,
+        vcodec: str = "libsvtav1",
+    ):
+        super().__init__()
+        self.repo_id = repo_id
+        self.output_repo_id = output_repo_id
+        self.root = Path(root) if root else None
+        self.output_root = Path(output_root) if output_root else None
+        self.vcodec = vcodec
+
+    def run(self, data=None, rank: int = 0, world_size: int = 1):
+        from datasets.utils.tqdm import disable_progress_bars
+        from lerobot.datasets.lerobot_dataset import LeRobotDataset
+        from lerobot.utils.constants import HF_LEROBOT_HOME
+        from lerobot.utils.utils import init_logging
+
+        init_logging()
+        disable_progress_bars()
+
+        dataset = LeRobotDataset(self.repo_id, root=self.root)
+        output_root = self.output_root or (HF_LEROBOT_HOME / self.output_repo_id)
+
+        if not dataset.meta.video_keys:
+            logger.info(f"Rank {rank}: No videos to process")
+            return
+
+        video_tasks = []
+        for old_video_key in dataset.meta.video_keys:
+            new_video_key = swap_left_right_name(old_video_key)
+            for ep_idx in range(dataset.meta.total_episodes):
+                try:
+                    src_path = dataset.root / dataset.meta.get_video_file_path(ep_idx, old_video_key)
+                    dst_relative = dataset.meta.get_video_file_path(ep_idx, old_video_key)
+                    dst_relative_str = str(dst_relative).replace(old_video_key, new_video_key)
+                    dst_path = output_root / dst_relative_str
+                    if src_path.exists():
+                        video_tasks.append((src_path, dst_path, ep_idx, old_video_key))
+                except KeyError:
+                    continue
+
+        # Distribute tasks across workers
+        my_tasks = [t for i, t in enumerate(video_tasks) if i % world_size == rank]
+        logger.info(f"Rank {rank}/{world_size}: Processing {len(my_tasks)}/{len(video_tasks)} videos")
+
+        for src_path, dst_path, ep_idx, video_key in my_tasks:
+            if video_is_valid(dst_path):
+                logger.info(f"Rank {rank}: Skipping {dst_path.name} (already done)")
+                continue
+            logger.info(f"Rank {rank}: Processing {src_path.name} -> {dst_path.name}")
+            flip_video_frames(src_path, dst_path, dataset.meta.fps, self.vcodec)
+
+
+class MirrorDataAndMetadata(PipelineStep):
+    """Pipeline step that mirrors parquet data and metadata (runs once on rank 0)."""
+    
+    def __init__(
+        self,
+        repo_id: str,
+        output_repo_id: str,
+        root: str | None = None,
+        output_root: str | None = None,
+    ):
+        super().__init__()
+        self.repo_id = repo_id
+        self.output_repo_id = output_repo_id
+        self.root = Path(root) if root else None
+        self.output_root = Path(output_root) if output_root else None
+
+    def run(self, data=None, rank: int = 0, world_size: int = 1):
+        if rank != 0:
+            return
+
+        from datasets.utils.tqdm import disable_progress_bars
+        from lerobot.datasets.lerobot_dataset import LeRobotDataset, LeRobotDatasetMetadata
+        from lerobot.datasets.utils import DATA_DIR, DEFAULT_DATA_PATH, write_info, write_stats, write_tasks
+        from lerobot.utils.constants import HF_LEROBOT_HOME
+        from lerobot.utils.utils import init_logging
+
+        init_logging()
+        disable_progress_bars()
+
+        dataset = LeRobotDataset(self.repo_id, root=self.root)
+        output_root = self.output_root or (HF_LEROBOT_HOME / self.output_repo_id)
+        
+        done_marker = output_root / ".data_mirrored"
+        if done_marker.exists():
+            logger.info("Data and metadata already mirrored, skipping")
+            return
+
+        robot_type = dataset.meta.robot_type or "bi_openarms_follower"
+        mirroring_mask = get_mirroring_mask(robot_type)
+
+        mirrored_features = {}
+        for key, feat in dataset.meta.features.items():
+            new_key = swap_left_right_name(key)
+            new_feat = feat.copy()
+            if "names" in new_feat and new_feat["names"]:
+                new_feat["names"] = [swap_left_right_name(n) for n in new_feat["names"]]
+            mirrored_features[new_key] = new_feat
+
+        new_meta = LeRobotDatasetMetadata.create(
+            repo_id=self.output_repo_id,
+            fps=dataset.meta.fps,
+            features=mirrored_features,
+            robot_type=dataset.meta.robot_type,
+            root=output_root,
+            use_videos=len(dataset.meta.video_keys) > 0,
+        )
+
+        if dataset.meta.tasks is not None:
+            write_tasks(dataset.meta.tasks, new_meta.root)
+
+        # Mirror parquet data
+        data_dir = dataset.root / DATA_DIR
+        parquet_files = sorted(data_dir.glob("*/*.parquet"))
+        action_names = dataset.meta.features.get("action", {}).get("names", [])
+        state_names = dataset.meta.features.get("observation.state", {}).get("names", [])
+
+        for src_path in parquet_files:
+            df = pd.read_parquet(src_path).reset_index(drop=True)
+            relative_path = src_path.relative_to(dataset.root)
+            chunk_dir = relative_path.parts[1]
+            file_name = relative_path.parts[2]
+            chunk_idx = int(chunk_dir.split("-")[1])
+            file_idx = int(file_name.split("-")[1].split(".")[0])
+
+            if "action" in df.columns and action_names:
+                actions = np.stack(df["action"].values)
+                mirrored_actions = np.array([mirror_array(row, action_names, mirroring_mask) for row in actions])
+                df["action"] = list(mirrored_actions)
+
+            if "observation.state" in df.columns and state_names:
+                states = np.stack(df["observation.state"].values)
+                mirrored_states = np.array([mirror_array(row, state_names, mirroring_mask) for row in states])
+                df["observation.state"] = list(mirrored_states)
+
+            dst_path = new_meta.root / DEFAULT_DATA_PATH.format(chunk_index=chunk_idx, file_index=file_idx)
+            dst_path.parent.mkdir(parents=True, exist_ok=True)
+            df.to_parquet(dst_path, index=False)
+
+        # Copy episodes metadata
+        episodes_dir = dataset.root / "meta/episodes"
+        dst_episodes_dir = new_meta.root / "meta/episodes"
+        if episodes_dir.exists():
+            dst_episodes_dir.mkdir(parents=True, exist_ok=True)
+            for src_parquet in episodes_dir.glob("*/*.parquet"):
+                df = pd.read_parquet(src_parquet)
+                columns_to_rename = {}
+                for col in df.columns:
+                    if col.startswith("videos/"):
+                        parts = col.split("/")
+                        if len(parts) >= 2:
+                            video_key = parts[1]
+                            new_video_key = swap_left_right_name(video_key)
+                            new_col = col.replace(f"videos/{video_key}/", f"videos/{new_video_key}/")
+                            columns_to_rename[col] = new_col
+                if columns_to_rename:
+                    df = df.rename(columns=columns_to_rename)
+                dst_parquet = dst_episodes_dir / src_parquet.relative_to(episodes_dir)
+                dst_parquet.parent.mkdir(parents=True, exist_ok=True)
+                df.to_parquet(dst_parquet, index=False)
+
+        new_meta.info.update({
+            "total_episodes": dataset.meta.total_episodes,
+            "total_frames": dataset.meta.total_frames,
+            "total_tasks": dataset.meta.total_tasks,
+            "total_videos": dataset.meta.total_videos,
+            "total_chunks": dataset.meta.total_chunks,
+        })
+        write_info(new_meta.info, new_meta.root)
+
+        if dataset.meta.stats is not None:
+            mirrored_stats = mirror_stats(dataset.meta.stats)
+            write_stats(mirrored_stats, new_meta.root)
+
+        done_marker.touch()
+        logger.info(f"Data and metadata mirrored to {output_root}")
+
+
+def mirror_stats(stats: dict) -> dict:
+    mirrored = {}
+    for key, value in stats.items():
+        new_key = swap_left_right_name(key)
+        if isinstance(value, dict):
+            mirrored[new_key] = mirror_stats(value)
+        else:
+            mirrored[new_key] = value
+    return mirrored
+
+
+def get_num_video_tasks(repo_id: str, root: str | None = None) -> int:
+    """Count total video files to process."""
+    from lerobot.datasets.lerobot_dataset import LeRobotDataset
+    dataset = LeRobotDataset(repo_id, root=root)
+    count = 0
+    for video_key in dataset.meta.video_keys:
+        for ep_idx in range(dataset.meta.total_episodes):
+            try:
+                src_path = dataset.root / dataset.meta.get_video_file_path(ep_idx, video_key)
+                if src_path.exists():
+                    count += 1
+            except KeyError:
+                continue
+    return count
+
+
+def make_mirror_executor(
+    repo_id: str,
+    output_repo_id: str,
+    root: str | None,
+    output_root: str | None,
+    vcodec: str,
+    job_name: str,
+    logs_dir: Path,
+    workers: int,
+    partition: str,
+    cpus_per_task: int,
+    mem_per_cpu: str,
+    time_limit: str,
+    slurm: bool = True,
+):
+    num_tasks = get_num_video_tasks(repo_id, root) if slurm else 1
+    num_tasks = max(1, num_tasks)
+
+    kwargs = {
+        "pipeline": [
+            MirrorDataAndMetadata(repo_id, output_repo_id, root, output_root),
+            MirrorVideos(repo_id, output_repo_id, root, output_root, vcodec),
+        ],
+        "logging_dir": str(logs_dir / job_name),
+    }
+
+    if slurm:
+        kwargs.update({
+            "job_name": job_name,
+            "tasks": num_tasks,
+            "workers": min(workers, num_tasks),
+            "time": time_limit,
+            "partition": partition,
+            "cpus_per_task": cpus_per_task,
+            "sbatch_args": {
+                "mem-per-cpu": mem_per_cpu,
+                "requeue": True,
+                "signal": "USR1@30",
+            },
+        })
+        return SlurmPipelineExecutor(**kwargs)
+    else:
+        kwargs.update({"tasks": 1, "workers": 1})
+        return LocalPipelineExecutor(**kwargs)
+
+
+def main():
+    logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(name)s - %(levelname)s - %(message)s")
+    parser = argparse.ArgumentParser(description="Mirror a bimanual robot dataset using SLURM")
+    parser.add_argument("--repo-id", type=str, required=True, help="Source dataset repo_id")
+    parser.add_argument("--output-repo-id", type=str, required=True, help="Output dataset repo_id")
+    parser.add_argument("--root", type=str, default=None, help="Source dataset root directory")
+    parser.add_argument("--output-root", type=str, default=None, help="Output dataset root directory")
+    parser.add_argument("--vcodec", type=str, default="libsvtav1", help="Video codec")
+    parser.add_argument("--logs-dir", type=Path, default=Path("logs"), help="Directory for datatrove logs")
+    parser.add_argument("--job-name", type=str, default="mirror_dataset", help="SLURM job name")
+    parser.add_argument("--slurm", type=int, default=1, help="Use SLURM (1) or local (0)")
+    parser.add_argument("--workers", type=int, default=64, help="Number of SLURM workers")
+    parser.add_argument("--partition", type=str, default="hopper-cpu", help="SLURM partition")
+    parser.add_argument("--cpus-per-task", type=int, default=4, help="CPUs per task")
+    parser.add_argument("--mem-per-cpu", type=str, default="2G", help="Memory per CPU")
+    parser.add_argument("--time-limit", type=str, default="04:00:00", help="SLURM time limit")
+
+    args = parser.parse_args()
+
+    executor = make_mirror_executor(
+        repo_id=args.repo_id,
+        output_repo_id=args.output_repo_id,
+        root=args.root,
+        output_root=args.output_root,
+        vcodec=args.vcodec,
+        job_name=args.job_name,
+        logs_dir=args.logs_dir,
+        workers=args.workers,
+        partition=args.partition,
+        cpus_per_task=args.cpus_per_task,
+        mem_per_cpu=args.mem_per_cpu,
+        time_limit=args.time_limit,
+        slurm=args.slurm == 1,
+    )
+    executor.run()
+
+
+if __name__ == "__main__":
+    main()
+