
ontologist
5 HN mentions · mentioned in 5 months, 2018–2023
2:51 · 2.4M views · Jun 9, 2010
A condensed rendition of a project that re-uploaded one video to YouTube 1000 times, showing the accumulating compression artifacts. It pays homage to Alvin Lucier's I Am Sitting in a Room.
Cited as a vivid demonstration of generation loss from repeated lossy re-encoding.
5 comments from Hacker News
You're not understanding how lossy compression encoders work. Try recompressing a JPEG a few dozen times. Or take an MP3 and export it from Audacity, open the export, export as MP3 again a dozen times and see what it sounds like. All those artifacts keep getting amplified every time you re-encode until it's practically just the artifacts. Every time you render and recompress you're losing information, it's lossy compression after all. this video
I remember back in like 2010, someone uploaded and ripped a YouTube video 1000 times and then edited the natural degradation of the compression. Went from perfectly watchable video to horrible static-y mess. Here it is! this video
The experiment has also been brought to the 21st century and its video and audio codecs: this video - uploading a video 1000 times to YouTube.
A take on it from 2010 but with YouTube compression: this video And MKBHD did a take on it in 2019 again with YouTube compression: [LINK]
If you don't have 15 minutes to waste on exposition, this is the first video that did this, and it's only 3 minutes total: this video