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mp4decrypt

    MP4 Decrypter - Version 1.4
    (Bento4 Version 1.6.0.0)
    (c) 2002-2015 Axiomatic Systems, LLC
    usage: mp4decrypt [options] <input> <output>
    Options are:
      --show-progress : show progress details
      --key <id>:<k>
          <id> is either a track ID in decimal or a 128-bit KID in hex,
          <k> is a 128-bit key in hex
          (several --key options can be used, one for each track or KID)
          note: for dcf files, use 1 as the track index
          note: for Marlin IPMP/ACGK, use 0 as the track ID
          note: KIDs are only applicable to some encryption methods like MPEG-CENC
      --fragments-info <filename>
          Decrypt the fragments read from <input>, with track info read
          from <filename>.