Post-Moore's Law: How dav1d Gets 60x Speed Via Hand-Coded Assembly
Compilers fail where every cycle matters. Learn how dav1d achieves 60x speedups with handcrafted assembly code, pushing machines beyond design limits.
FFmpeg: The Incredible Technology Behind Video on the Internet | Lex Fridman Podcast #496
Lex Fridman speaks with Jean-Baptiste Kempf and Kieran Kunhya about FFmpeg and VLC, the open-source software systems that power most video and audio on the internet. They delve into the technical complexities of video codecs, the ethics of open-source development, and the future of multimedia from teleoperation to brain-computer interfaces.
Key takeaways
- Compilers with auto-vectorization are "not even close" to matching handwritten assembly for critical code paths, delivering 10x to 60x slower performance, according to Kieran Kunhya. Read more →
- Large corporations routinely exploit volunteer open-source maintainers, treating their work as free labor without adequate financial or technical contribution. Read more →
- Ultra-low latency is the next frontier for control. Jean-Baptiste Kempf, co-founder of VLC and FFmpeg, launched Kyber with one specific, audacious goal: achieve 4 milliseconds glass-to-glass latency for real-time machine control. Read more →
- Open-source engineers dedicate years to reverse engineering proprietary video codecs (like GoToMeeting) to ensure universal compatibility and digital preservation for projects such as FFmpeg and VLC. Read more →
4 articles from this episode
Open Source Burnout: Corporations Exploit Free Critical Code
Founders rely on open source. But trillion-dollar firms exploit volunteer maintainers, leading to burnout and system collapse. Here's how to fix it.
Beyond Video: Kyber's 4ms Latency Redefines Multimedia
FFmpeg founder Jean-Baptiste Kempf expands multimedia to 4ms latency for teleoperation, haptics, and BCI. Discover Kyber's plan to make distance disappear.
Reverse Engineering: Deciphering Codecs Like Binary Specs
Founders: learn how open-source 'wizards' decode proprietary systems with disassemblers and intuition, and apply that mindset to opaque business problems.
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