3 Replies Latest reply: Jan 26, 2013 7:27 AM by Russ H
plettplett Level 1 Level 1 (0 points)

i need to merge an .ac3 audio file and a separate uncompressed picture into an uncompressed quicktime file


Compressor, Mac OS X (10.7.5)
  • 1. Re: merge .ac3 and  uncompressed
    Russ H Level 6 Level 6 (14,255 points)

    Compressor is wrong app for this. Use MPEG sSTreamclip.

     

    Make a new folder in Finder. Take your two streams and give them identical names (before the extension).

     

    Open Streamcliip and select both files. Export.

     

    Good luck.

     

    Russ

  • 2. Re: merge .ac3 and  uncompressed
    plettplett Level 1 Level 1 (0 points)

    hello russ

     

    that was fast.  thanks.  did exactly as you asked, and the results worked like a charm.  nice, elegant

     

    but there's a critical problem:  it seems as if the .ac3 file was stereo encoded (mixed down) in the resultant QT output.  this is exactly what premiere cs 6 does.  i was wondering if the same is true of final cut x & compressor?  i need a QT playback device to recognize the embedded audio as an .ac3 (dolby digital), and not LtRt or stereo track.  any ideas?

     

    here is the header info from the merged file exported through mpeg streamclip:

     

    General

    Complete name : /images/Crazy_ac3/crazy_comp_ac3/crazy_1920_1080_29.97fps_5.1_comp.mov

    Format : QuickTime

    Format/Info : Original Apple specifications

    File size : 5.32 GiB

    Duration : 1mn 0s

    Overall bit rate : 760 Mbps

    Encoded date : UTC 2013-01-26 00:36:31

    Tagged date : UTC 2013-01-26 00:39:48

    Writing library : Apple QuickTime

     

     

    Video

    ID : 1

    Format : RLE

    Format/Info : Run-length encoding

    Codec ID : rle

    Duration : 1mn 0s

    Bit rate : 758 Mbps

    Width : 1 920 pixels

    Height : 1 080 pixels

    Display aspect ratio : 16:9

    Frame rate mode : Constant

    Frame rate : 29.970 fps

    Bits/(Pixel*Frame) : 12.197

    Stream size : 5.31 GiB (100%)

    Language : English

    Encoded date : UTC 2013-01-26 00:36:31

    Tagged date : UTC 2013-01-26 00:39:48

     

     

    Audio

    ID : 2

    Format : PCM

    Format settings, Endianness : Big

    Format settings, Sign : Signed

    Codec ID : twos

    Duration : 1mn 0s

    Bit rate mode : Constant

    Bit rate : 1 536 Kbps

    Channel(s) : 2 channels

    Sampling rate : 48.0 KHz

    Bit depth : 16 bits

    Stream size : 11.0 MiB (0%)

    Language : English

    Encoded date : UTC 2013-01-26 00:36:31

    Tagged date : UTC 2013-01-26 00:39:48

  • 3. Re: merge .ac3 and  uncompressed
    Russ H Level 6 Level 6 (14,255 points)

    plettplett wrote:

     

     

    i need a QT playback device to recognize the embedded audio as an .ac3 (dolby digital), and not LtRt or stereo track.  any ideas?

     

    Sorry, but I don't. Hopefully someone who does will chime in. If not, you might try one of the Logic or Sountrack boards.

     

    Good luck.

     

    Russ