1.3.0 Audio (1 Viewer)

CairnsFella

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July 24, 2008
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Hi all,

Havent had to trouble anyone for... well I dont know how long. Been happily using 1.2.x along with 4TR for a long time now with few issues.

Recently, however, I decided to upgrade to 1.3.0. Unfortunately I had quite a few issues with the upgrade. Primarily down to not realising I needed to upgrade 4TR, but even after then I ended up - eventually - having to fully uninstall MP and 4TR (updated to ARGUS), and clean reinstall to a different location to get MP to work at all ( previously had all apps on D drive but would work until all relocated to C).

Anyway, that's just a little background.

I had previously been using SAF and ffdshow for audio, and explicitly prefer to have all my stereo programming output to 5.1. Because of the hours of issues I had with the reinstall I decided to keep it simple and go with the bunded LAV filters. However, I could not for the life of me output stereo to 5.1. Clearly the mixing options were having some effect as selecting options had a marked impact on the sound EXCEPT I was never getting surround or LFE channels (reflected by listening, and the output monitor graphic). I have reverted then to ffdshow, and once again have the desired 5.1 output.

I am still curious, however, if there was anything I may have been doing wring in LAV, as I would still prefer to keep the setup as simple as poss, and as much as I like ffdshow, I would happily trim back down to LAV if I could get the 5.1 working.

I also seem to have a side effect with the current set up with ffdshow audio filters in as much as a program will start, and although I hear the audio, it takes some time (perhaps a minute or more) for the video to display. This happens every time. On occasion I also have difficulty stopping the playback i.e. it takes another minute or so to respond.

I realise it seems as though this is video and not audio related, however it was not doing this with the - stereo only - LAV setup.

To be honest, I can probably live with the minor inconvenience for the return of 5.1 audio, however if there are any views as to why this may be occurring or how I can set up LAV differently I would greatly appreciate any input.

Although the above is my primary enquiry, I would also welcome, just from curiosity, any views as to overall benefits from using LAV only, or, conversely, disadvantages of using ffdshow instead / as well.

Thanks for your time.
 

Holzi

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  • April 21, 2010
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    Is there a more appropriatte location to post this query ?

    On the mixing tab in LAV audio decoder have you tried to enable "Dolby Pro Logic II" (under Matrix Encoding)?
    %3DLAV_Audio_-_Mixing.JPG
     

    CairnsFella

    Portal Pro
    July 24, 2008
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    I have tried this, however I am certainly happy to try it again (after trying so many combinations its no longer possible to be 100% sure of what I actually did and didnt do, even though I believe I covered all the options on that screen). I'll post back after double checking.

    Appreciatte your assistance.
     

    CairnsFella

    Portal Pro
    July 24, 2008
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    No luck ..:(

    Im sure your correct in as much as that should work, but for some reason it just doesnt for me.

    I should perhaps say that I am using analog outs to my amp (though I dont know if this should make any difference or not... but its fine with ffdshow).. digital out is not an option for me.

    Thanks again for the suggestion though.
     

    Holzi

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  • April 21, 2010
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    I think it is not possible to upmix stereo sources with LAV audio decoder yet.

    See:
    Quote:
    Originally Posted by moliko
    I have a issue with the Dolby Pro Logic II.
    Enable Mixing is set to 5.1.
    Matrix Encoding: Dolby Pro Logic II
    Setttings: Don´t mix Stereo sources unchecked
    The Output shows 6 Channels but its plays only Stereo.

    DPLII is only for downmixing, so that a DPLII-compatible receiver can reconstruct a 5.1 signal (useful in case you only have a stereo SPDIF link to your receiver, for example)
    LAV does not do any upmixing right now, because proper upmixing requires a lot of filtering, and simple upmixing sounds terrible for movies.


    From: http://forum.doom9.org/showthread.php?p=1620752#post1620752


    I think you have to use ffdshow for that.
     
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