Handling MP4 files purely in Java can be resource-intensive and often lacks support for the latest codecs. By using JNA to hook into native libraries, you get:

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Bridging Java and Video: A Guide to Using JNA for MP4 Playback

Because you are stepping outside the JVM, you must be careful to release media player resources to avoid memory leaks. Conclusion

Java is famous for its "Write Once, Run Anywhere" philosophy, but when it comes to high-performance video processing like playing an MP4, the standard JVM often needs a boost. That’s where comes in. What is JNA?

Instantly support almost any video container (MKV, MP4, AVI) without writing decoders.