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so, theoretically, if i used the asm.js port of ffmpeg.js to do the conversion clientside that would be ok?

• sigio 9y ago
  Why bother transcoding... youtube will gladly serve you various audio and video formats seperately. Just download the opus stream and save to a file. Let te user transcode to mp3 if they need it.
  • gruez 9y ago
    afaik they only serve AAC and opus audio, which should be fine on modern players, but people with embedded players and/or old ipods might need a mp3. >Let te user transcode to mp3 if they need it. convenience factor
  • striking 9y ago
    You need to put the video and audio streams together, though. Which requires a transcode pass.
    • mixedCase 9y ago
      I think that's called muxing, since you aren't really changing codecs, just bundling streams together.
    • satysin 9y ago
      Not a transcode just a mux of the different audio and video files into a container such as MP4 or MKV. Pop ffmpeg in the same directory as youtube-dl and it will do the work for you. A simple 'youtube-dl [video url] -f bestvideo+bestaudio' will get you a nice single file with the best audio and video :)