Code Snippetsmp3dump: Rip the audio stream of a Flash video to MP3 Syndicate content

Fri, 03/28/2008 - 00:03

UPDATE: Also check out mp3dump part 2

On some undefined occasion you might want to dump the audio stream of a flash file. This is how you do it:

  1. Get the *.flv, e.g. visit youtube with Konqueror and check /tmp for a file like FlashV5SQLt - this is your FLV.
  2. Install some dependencies: ffmpeg is required, mp3info and ecasound are optional but strongly recommended.
  3. Download the script below (it’s attached!) and save it inside your $PATH, remember how you’ve called it!
  4. I’ve saved the script inside ~/.bin which is inside my $PATH so all I have to do now is running it:

    mp3dump FlashV5SQLt "Foo Bar" "All Your Base Are Belong To Us"

    This would rip the audio stream of FlashV5SQLt to a file named Foo Bar - All Your Base Are Belong To Us.mp3 - with emulated stereo sound and basic MP3 tags (artist and title). Coolio!

So what does this neat-o-bash-magic look like?

Note: The script is attached below, so no copy’n’paste is required (but optionally supported :-) )

  1. #!/bin/bash
  2. #
  3. # Simple script to rip the audio stream of a FLV to MP3
  4. #
  5. # usage: mp3dump INPUT.flv ARTIST TITLE
  6. # example: mp3dump FlashhxSjv3 "Foo Bar" "All your Base are Belong to Us"
  7. # Author: Milian Wolff
  8. # depends on: ffmpeg
  9. # optional: ecasound for stereo sound emulation
  10. # optional: mp3info to write title and artist mp3 tags
  11.  
  12. if [[ "$(which ffmpeg)" == "" ]]; then
  13. echo -e "\033[41mInstall ffmpeg or this script wont work!\033[0m"
  14. exit
  15. fi
  16.  
  17. if [[ "$1" == "" || "$2" == "" || "$3" == "" || "$4" != "" ]]; then
  18. echo "Usage: $(basename $0) INPUT.flv ARTIST TITLE"
  19. exit
  20. fi
  21.  
  22. dest="$2 - $3.mp3"
  23. tmpfile="/tmp/$$-$dest"
  24.  
  25. echo "Destination file is: $dest"
  26. echo
  27. echo
  28.  
  29. echo "generating mp3 file..."
  30. echo
  31. ffmpeg -i "$1" -f mp3 -vn -acodec copy "$dest" 1>/dev/null
  32. echo
  33. echo -e " \033[32mdone\033[0m"
  34. echo
  35.  
  36. if [[ "$(which ecasound)" == "" ]]; then
  37. echo "You can optionally install ecasound to simulate stereo sound"
  38. echo
  39. else
  40. echo -n "simulating stereo sound..."
  41.  
  42. ecasound -d:1 -X -i "$dest" -etf:8 -o "$tmpfile" 1>/dev/null
  43. mv "$tmpfile" "$dest"
  44.  
  45. echo -e " \033[32mdone\033[0m"
  46. echo
  47. fi
  48.  
  49.  
  50. if [[ "$(which mp3info)" == "" ]]; then
  51. echo "You can optionally install mp3info to write basic mp3 tags automatically"
  52. echo
  53. else
  54. echo -n "writing basic mp3 tags..."
  55.  
  56. mp3info -a "$2" -t "$3" "$dest"
  57.  
  58. echo -e " \033[32mdone\033[0m"
  59. echo
  60. fi
  61.  
  62. echo "Have fun with »$dest«"

PS: I totally forgot to mention that I got the basic ffmpeg & ecasound commands from this thread by SuperMike:
http://www.ubuntuforums.org/showpost.php?p=1949017&postcount=1

AttachmentSize
mp3dump.1.35 KB

Comments

I always did it manually with Mon, 06/29/2009 - 22:44 — Alan (not verified)

I always did it manually with mplayer -dumpaudio and then tagged it with eye3d. The tip about stereo sound is priceless. Thanks.

thanks, was looking for some Sun, 11/23/2008 - 21:50 — Jan (not verified)

thanks, was looking for some code for a new project. youtube does not use flv by any chance, does it?

Actually, it does: As I Wed, 11/26/2008 - 18:45 — Milian Wolff

Actually, it does:

As I mentioned at the beginning of the article, you can simply visit Youtube with your favorite browser under Linux and you’ll find the video you are watching somewhere under /tmp (look for cryptic names like FlashMYeMdJ). Make sure to rip before you close the page in your browser, else the temporary file will be deleted.

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