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Apple Lossless [Apple Open Source Encoder / Decoder]

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  • Spoon
    Administrator
    • Apr 2002
    • 44095

    Apple Lossless [Apple Open Source Encoder / Decoder]

    We have updated our codecs to use Apples released code.

    <now released (as part of R14.3)>
    Last edited by Spoon; September 06, 2012, 11:08 AM.
    Spoon
    www.dbpoweramp.com
  • tester
    • Oct 2011
    • 9

    #2
    Re: Apple Lossless [Apple Open Source Encoder / Decoder]

    Hi Spoon,

    Sorry dumb question, but is this beta?

    Thanks

    Comment

    • DarkZod
      • Jun 2009
      • 27

      #3
      Re: Apple Lossless [Apple Open Source Encoder / Decoder]

      refalac64 is still faster, what encoder is used for this?

      Comment

      • Spoon
        Administrator
        • Apr 2002
        • 44095

        #4
        Re: Apple Lossless [Apple Open Source Encoder / Decoder]

        Apples own Encoder is used.

        This is the beta.
        Spoon
        www.dbpoweramp.com

        Comment

        • Spoon
          Administrator
          • Apr 2002
          • 44095

          #5
          Re: Apple Lossless [Apple Open Source Encoder / Decoder]

          Updated 1st December

          Works with multi channel (more than 2) now.
          Spoon
          www.dbpoweramp.com

          Comment

          • charlesb
            • Nov 2010
            • 8

            #6
            Re: Apple Lossless [Apple Open Source Encoder / Decoder]

            I have a problem when using the beta ALAC codec to encode 5.1 multi channel files. When I encode 5.1 files with high frequencies or sample size (96 kHz or 48 kHz / 24 bits), the resulting ALACs have negative chunk offsets in STCO box. I could upload samples ALAC files if it can help (but they are quite big).

            Comment

            • Spoon
              Administrator
              • Apr 2002
              • 44095

              #7
              Re: Apple Lossless [Apple Open Source Encoder / Decoder]

              What size is the file, > 2GB or > 4GB?
              Spoon
              www.dbpoweramp.com

              Comment

              • charlesb
                • Nov 2010
                • 8

                #8
                Re: Apple Lossless [Apple Open Source Encoder / Decoder]

                All files I used for my tests (including WAV source files) take less than 350 mb.

                Comment

                • PeterP
                  Super Moderator
                  • Jul 2011
                  • 1379

                  #9
                  Re: Apple Lossless [Apple Open Source Encoder / Decoder]

                  What exactly do you mean "negative chunk offsets"? STCO specification quite clearly says that the offsets are unsigned integers so they cannot be negative, am I right?

                  Comment

                  • charlesb
                    • Nov 2010
                    • 8

                    #10
                    Re: Apple Lossless [Apple Open Source Encoder / Decoder]

                    As you probably know values are negative if we convert them to signed integers, and they are very big integers if they are unsigned. Here is a screenshot :

                    Comment

                    • PeterP
                      Super Moderator
                      • Jul 2011
                      • 1379

                      #11
                      Re: Apple Lossless [Apple Open Source Encoder / Decoder]

                      Thanks for the report, I think I have a good idea what the issue is. An update correcting it will be posted shortly.

                      Comment

                      • Spoon
                        Administrator
                        • Apr 2002
                        • 44095

                        #12
                        Re: Apple Lossless [Apple Open Source Encoder / Decoder]

                        Update 5th January 2012

                        Bug Fix to Apple Lossless Encoder where for certain audio types (5.1 24 bit) the wrong value could be written to STCO

                        Download update as first message.
                        Spoon
                        www.dbpoweramp.com

                        Comment

                        • charlesb
                          • Nov 2010
                          • 8

                          #13
                          Re: Apple Lossless [Apple Open Source Encoder / Decoder]

                          Thanks, I do not have STCO problem anymore.

                          Comment

                          • Nubben
                            dBpoweramp Enthusiast
                            • Apr 2008
                            • 154

                            #14
                            Re: Apple Lossless [Apple Open Source Encoder / Decoder]

                            Hi - does this beta codec add the meta data before the other data so to optmise for streaming? Will a dBpa ripped version differ in any way from an iTunes ripped file?

                            Thanks!

                            Nubben

                            Comment

                            • Spoon
                              Administrator
                              • Apr 2002
                              • 44095

                              #15
                              Re: Apple Lossless [Apple Open Source Encoder / Decoder]

                              Tags are written before the data.

                              dBpoweramp will at least tell you if the track contains ripping errors...
                              Spoon
                              www.dbpoweramp.com

                              Comment

                              Working...

                              ]]>