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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 perfe

• citrusui 9y ago
  Thanks for the link! This may sound crazy, but I wonder if there's a way to "automate" this deconstruction with ffmpeg...
  • citrusui 9y ago
    Update: here's a one-liner that will do exactly that ffmpeg -i input.mp4 -strict -2 -crf 51 output.mp4 && rm input.mp4 && mv output.mp4 input.mp4 For better results, run the above command ten times: for ((n=0;n<10;n++)); do ffmpeg -i input.mp4 -strict -2 -crf 51 output.mp4 && rm input.mp4 && mv output.mp4 input.mp4; done
• rothron 9y ago
  Theoretically, it should be possible to recompress the video back into the compressed file with no loss, provided the same codec is used, but it would be far more expensive computationally.
  • pbhjpbhj 9y ago
    Aren't most image/video compression algorithms lossy? There would surely be more than one possible "decompression".
• bringtheaction 9y ago
  Here’s another one up the same alley that is interesting to watch: VHS generation loss. > What happens if you make a copy of a copy of a copy (and so on) of a VHS tape? This experiment shows how the quality degrades with every generation. > The copying was done using two PAL VCRs in SP mode. > (The video is Fading like a flower by Roxette) https://youtu.be/mES3CHEnVyI https://youtu.be/mES3CHEnVyI