#496 – FFmpeg: The Incredible Technology Behind Video on the Internet

771 snips

May 6, 2026

Guest

Kieran Kunhya

Guest

Jean-Baptiste Kempf

Jean-Baptiste Kempf, VLC lead developer and VideoLAN president, joins Kieran Kunhya, FFmpeg contributor and codec engineer. They explore why VLC opens bizarre files, how codecs and containers quietly power online video, and why FFmpeg became universal media plumbing. The chat also hits reverse engineering, handwritten assembly, ad-free ideals, open source drama, and the future of streaming, XR, and archiving.

Ask episode

AI Snips

Chapters

Transcript

Episode notes

INSIGHT

x264 Won By Optimizing For Human Eyes Not PSNR

x264 changed internet video by optimizing for what humans see well, not for academic metrics like PSNR.
Kieran Kunhya says psychovisual tuning and adaptive quantization preserved detail in hard samples like ParkJoy instead of blurring everything.

INSIGHT

Better Codecs Trade Huge Encode Cost For Massive Scale

New codecs keep the same broad ideas but add more tools, delivering roughly 30 to 60 percent better compression at far higher encode cost.
Jean-Baptiste Kempf says YouTube often re-encodes only popular uploads into AV1 because the extra compute pays off at scale.

INSIGHT

Attackers Weaponized Fake VLC Builds Not VLC Itself

Intelligence agencies abused VLC's legitimacy by shipping lookalike builds with one extra malicious DLL rather than modifying playback itself.
Jean-Baptiste Kempf says the CIA and later Chinese attackers used fake distributions to steal documents while users watched video normally.

Get the Snipd Podcast app to discover more snips from this episode

Get the app

Jean-Baptiste Kempf is lead developer of VLC and president of VideoLAN. Kieran Kunhya is a longtime FFmpeg contributor, codec engineer, and the person behind the now-infamous FFmpeg account on X.
Thank you for listening ❤ Check out our sponsors: https://lexfridman.com/sponsors/ep496-sc
See below for timestamps, transcript, and to give feedback, submit questions, contact Lex, etc.

Transcript:
https://lexfridman.com/ffmpeg-transcript

CONTACT LEX:
Feedback – give feedback to Lex: https://lexfridman.com/survey
AMA – submit questions, videos or call-in: https://lexfridman.com/ama
Hiring – join our team: https://lexfridman.com/hiring
Other – other ways to get in touch: https://lexfridman.com/contact

EPISODE LINKS:
FFmpeg on X: https://x.com/FFmpeg
FFmpeg: https://ffmpeg.org/
VideoLAN (VLC): https://www.videolan.org/
VideoLAN on X: https://x.com/videolan
Jean-Baptiste’s Website: https://jbkempf.com/
Jean-Baptiste’s LinkedIn: https://www.linkedin.com/in/jbkempf/
Jean-Baptiste’s GitHub: https://github.com/jbkempf
Kieran’s X: https://x.com/kierank_
Kieran’s LinkedIn: https://bit.ly/3OORhmC
Kieran’s GitHub: https://github.com/kierank

SPONSORS:
To support this podcast, check out our sponsors & get discounts:
Larridin: Measure AI adoption in your business.
Go to https://larridin.com
Blitzy: AI agent for large enterprise codebases.
Go to https://blitzy.com/lex
BetterHelp: Online therapy and counseling.
Go to https://betterhelp.com/lex
Fin: AI agent for customer service.
Go to https://fin.ai/lex
LMNT: Zero-sugar electrolyte drink mix.
Go to https://drinkLMNT.com/lex
Perplexity: AI-powered answer engine.
Go to https://perplexity.ai/

OUTLINE:
(00:00) – Introduction
(03:00) – Sponsors, Comments, and Reflections
(10:48) – Weirdest things VLC opens
(15:12) – How video playback works
(24:33) – Video codecs and containers
(35:20) – FFmpeg explained
(56:20) – Linus Torvalds
(1:00:59) – Turning down millions to keep VLC ad-free
(1:15:17) – FFmpeg & Google drama
(1:34:31) – FFmpeg developers
(1:41:08) – VLC and FFmpeg
(1:45:42) – History of FFmpeg
(1:48:59) – Reverse engineering codecs
(2:02:14) – FFmpeg testing
(2:06:21) – Assembly code (handwritten)
(2:30:39) – Rust programming language
(2:39:55) – FFmpeg and Libav fork
(2:48:17) – Open source burnout
(2:56:04) – x264 and internet video
(3:09:20) – Video compression basics
(3:16:17) – CIA and fake VLC
(3:26:52) – Ultra low latency streaming
(3:44:20) – AV2 codec and video patents
(3:54:12) – VLC backdoors
(4:04:27) – Video archiving
(4:11:04) – Future of FFmpeg and VLC