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Why am I missing some 5.1 channels after Compressor burns BluRay disc.

1315 Views 11 Replies Latest reply: Mar 28, 2014 9:14 AM by BoBo1 RSS
BoBo1 Level 1 Level 1 (10 points)
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Jan 6, 2013 7:29 PM

Why am I missing some 5.1 channels after Compressor burns BluRay disc.


Hoping there are some experts out there who could explain why only three of my six 5.1 audio channels play on a BluRay disc.


I am using Final Cut Studio 2  (FCP 7.0.3, Compressor 3.5.4, Soundtrack 3.0.1) on an Intel iMac with  OS 10.6.3


I have been successful with the SHARE function of Final Cut Pro 7 producing BluRay home movies (1440x1080) containing 2Ch Stereo, and when played back through my Yamaha surround sound system, the ProLogic function does a fair job creating a pseudo surround sound.


Now with a new AVCHD camcorder, I have real 5.1 sound and beautiful1920x1080 video that I would like to burn to BluRay.   I know the 5.1 channels can’t be processed with the SHARE function of FCP 7, but rather have to be “Send to Compressor” from the SHARE pane.

(I think that’s the way to do it; if not, please suggest some alternatives)


After numerous attempts, I have burned a BluRay disc successfully using Compressor, but when played back through my home audio system, the only audio channels heard from my surround system are the front L & R channels and the LFE low frequency channel.  The video is fine and in sync with the three channels of audio.


I know I have audio on those other channels as seen in the FCP timeline below:

Screen shot 2013-01-06 at 10.21.09 PM.png


Below are three screenshots of the Inspector pane containing the Audio tabs and Compressor options that I have tried so far.  Can anyone see from these screenshots and tab selections why I’m not getting any sounds from the Center, LS, RS speakers?

Screen shot 2013-01-06 at 2.12.05 PM.png Screen shot 2013-01-06 at 2.12.28 PM.png

Screen shot 2013-01-06 at 2.12.42 PM.png Screen shot 2013-01-06 at 2.51.47 PM.png


Searching the Forum for similar problems and solutions was unsuccessful;  reading through the Compressor and Soundtrack user manuals was dizzying. 


The easy part was downloading and converting MTS files from the AVCHD camcorder, ……converting the files to ProRes 422 .mov files and six channels of audio using Aunsoft-PavTube or ClipWrap., ……and then finally dragging ProRess .mov files to the FCP 7 timeline as shown above.


Is there anyone who has been successful with this workflow, or another approach ?


Thanks in advance,


  • Michael Grenadier Level 6 Level 6 (19,795 points)

    Not sure you can do it.  You have to "add surround sound" and assign individual audio files to each channel in compressor to encode a dolby 5:1 track.  Not sure if it's possible to integrate that into a blu ray encode.  You might try roxio toast or Adobe Encore to do it.

  • Russ H Level 6 Level 6 (12,860 points)

    Just to point out that I don't think you're right about ML being required for Encore. It should run on 10.6 and up.


    There is a 30 day Creative Cloud trial if you want to test it. Thereafter it's $50/mo (for the whole Master suite).



  • Russ H Level 6 Level 6 (12,860 points)

    BoBo1 wrote:



    I haven’t ruled out trying the Encore trial;  but I’d have to make an entire clone of my current OS before going in that upward direction. 


    Yes. Smart.



  • Michael Grenadier Level 6 Level 6 (19,795 points)

    I'm running 10.6.8 for a long time without any problems with heavy FCP, DVDSP, Motion and Soundtrack pro use.

  • Memo2Self Calculating status...

    BoBo, I've been scouring the web for many of the same answers you're still trying to find.  I cannot make a Blu-Ray with 6 channels of surround audio either, and I've been at this for three full days now.  I'm hoping this discussion is still active somehow, because I'm frustrated and lost.


    I originally exported a 140GB Quicktime movie from FCP7 (a feature film I'm cutting), with six discrete tracks of audio, in an order I was told was the correct and proper lineup:  Left, Right, Center, LFE, Left Surround, Right Surround.  I checked the movie when it was done and it indeed had six tracks.  Now I opened Compressor 3.5.3 and selected the "Create Blu-Ray" option.  Dragging the full movie into the pane, it all showed up, but I had no way of knowing if the 3/2 option in the Inspector matched my track lineup in the QT movie (it even said "L, C, R," which is not the same order).  Then I tried opening the "Add Surround Sound" tab, but I can't separate the six discrete tracks from the Quicktime movie and place them into that pattern.  So a melded movie is not going to work.


    I then went back to FCP and individually exported each of the six tracks as AIFFs, and created a version of the video with no sound.  Everything is identically in sync.  Now I re-opened Compressor, hit "Create Blu-Ray," imported the silent video, deleted the "DVD Dolby Audio" tab (since I was going to be using Dolby Digital Professional 5.1 with the six tracks), and then hit "Add Surround Sound."  Now I was able to place each of the tracks into the boxes, but as soon as I hit OK, I got a second window in the pane, not an audio file in the same one as the picture.  TWO jobs, and I still have no idea how to merge them into a single job that will burn onto a Blu-Ray.


    I'm going completely nuts.  This shouldn't be so tough -- I've now exported my feature as a merged QT movie and as seven individual video and audio files, and nothing is working.  (And no, I don't have Adobe Encore, and Toast 11 won't marry my compressed H.264 and ac3 files either, turning them into a playlist.)  Can ANYONE tell me what I'm doing wrong?  THANK YOU.

  • Memo2Self Level 1 Level 1 (0 points)

    Thanks for writing back so quickly.  I had actually found your "workflow" thread before replying to this one.  I guess the question I'm still not clear about deals with this image from your post:

    Does that 3/2 Audio Coding Mode actually refer to the correct surround placement of the six-track Quicktime movie that it's reading?  If my tracks leaving FCP are positioned, from top to bottom, L, R, C, LFE, Ls, and Rs, is Compressor going to put them in the correct configuration with a "3/2 (L, C, R, Ls, Rs)" setting?  And am I just overthinking this "Add Surround Sound" graphic and have it right all along with a correctly-exported QT movie from FCP?


    Arrrrrgghhhh... thanks...



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