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I am looking for the best way to convert convert MP3 audiobooks to M4B ones.

  • Minimize the quality loose on recompression.
  • Optionally be able to auto-choose best M4A/M4B compression method based on the quality of the input mp3 files.

Why I would want this? As far as I know MP3 audiobooks do not support bookmarking.

share|improve this question
Now I'm using Audio Book Builder but I'm not very pleased about how it works, always makes a copy of the source files, it does not display the quality of them and it doesn't have an option to select best quality. – sorin Dec 9 '11 at 0:38

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