---
title: "Discussion on \"[2] Data Engineering: Why and How to Convert LeRobot (Parquet/MP4) to HDF5\" | Hashnode"
description: "Discussion on \"[2] Data Engineering: Why and How to Convert LeRobot (Parquet/MP4) to HDF5\". Why MP4 is bad for JEPA training and how to build a memory-efficient HDF5 conversion pipeline for LeWM World Models."
url: "https://hashnode.com/posts/from-mp4-to-hdf5/69df5cb3fd38c9c17491d1ba"
---

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# [\[2\] Data Engineering: Why and How to Convert LeRobot (Parquet/MP4) to HDF5](https://blog.tanguy-pauwels.fr/from-mp4-to-hdf5?utm_source=hashnode&utm_medium=feed)

Why MP4 is bad for JEPA training and how to build a memory-efficient HDF5 conversion pipeline for LeWM World Models.

Apr 15 · 4 min read · blog.tanguy-pauwels.fr  
Updated Apr 16  
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-   [#data-engineering](https://hashnode.com/tag/data-engineering)
-   [#python](https://hashnode.com/tag/python)
-   [#hdf5](https://hashnode.com/tag/hdf5)
-   [#robotics](https://hashnode.com/tag/robotics)
-   [#lerobot](https://hashnode.com/tag/lerobot)
-   [#machine-learning](https://hashnode.com/tag/machine-learning)

## Written by

[Tanguy Pauwels](https://hashnode.com/@tanguy-pauwels)

@tanguy-pauwels · France

  
[View profile](https://hashnode.com/@tanguy-pauwels)

ML Engineer & Full Stack Developer

From precision mechanics at BMW to high-performance Machine Learning. Focused on optimization, raw performance, and architectural pragmatism.

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