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Convering MP4 for Streambaby but nothing out of center channel?

Discussion in 'TiVo Home Media Features & TiVoToGo' started by atomarchio, Sep 13, 2012.

  1. atomarchio

    atomarchio Member

    716
    0
    Sep 24, 2006
    I am converting video files to MP4 for playback on Streambaby.

    It works fine but have been noticing I can't hear the spoken dialogue and am turning up/down volume during the entire video.

    I have Left-Right-Center speakers in my AV receiver(Sony 3500ES) but am noticing no sound of center channel. I am not using surround sound on receiver but the multi-channel stero where sound comes out of all 3 speakers.

    When coverting the file to MP4, is there a way to add convert the file so sound will come through center channel?

    I am using Handbrack and also have Aimersoft Video Converter.

    I need help with the correct audio settings to get sound through center channel.

    Please help. Thank you.
     
  2. Dan203

    Dan203 Super Moderator Staff Member TCF Club

    37,454
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    Apr 17, 2000
    Nevada
    Does the resulting file have AC3 audio? Or is it being recoded to AAC? If it's AC3 then you need to make adjustments on your A/V receiver. If it's AAC then you need to play with the options in your conversion program and increase the compression. Compression will make the dialog louder and the sound effects softer when converting to stereo.

    Might also want to check that it's NOT using 5.1 AAC. AAC has the ability to store 5.1 but very few devices support it. So if that's what it has the TiVo might just be throwing out the extra channels and only playing Left/Right, which would exclude most of the dialog.

    Dan
     
  3. atomarchio

    atomarchio Member

    716
    0
    Sep 24, 2006
    Here is the information for the source file before I convert to MP4 in Handbrake.

    Audio
    ID : 2
    Format : DTS
    Format/Info : Digital Theater Systems
    Codec ID : A_DTS
    Duration : 1h 40mn
    Bit rate mode : Constant
    Bit rate : 1 510 Kbps
    Channel(s) : 6 channels
    Channel positions : Front: L C R, Side: L R, LFE
    Sampling rate : 48.0 KHz
    Bit depth : 24 bits
    Compression mode : Lossy
    Stream size : 1.06 GiB (24%)
    Language : English
    Default : Yes
    Forced : No

    I am converting the file now in MP4 to Handbrake.

    Under the audio tab in Handbrake under source it says,

    1 English DTS 5.1
    AAC (Faac)
    Dolby ProLogic II

    I don't see anything that refernces AC3 audio.

    As it appears you're right about the AAC, what setting should I change under Handbrake when converting to MP4?

    Or should I use the Aimersoft Video Converter instead? That seems to have more options but I don't understand most of them.

    Please help. Thank you.
     
  4. bigguy126

    bigguy126 Member

    95
    2
    Sep 4, 2007
    I use handbrake too and had this same problem. There should be a setting for AC3 passthru on the audio tab. This will preserve the dolby and center channel.
     
  5. atomarchio

    atomarchio Member

    716
    0
    Sep 24, 2006
    When I ran the mediainfo for this file, it did not say AC3 anywhere though.

    I see 3 passthrough options. There is AAC passthrough, AC3 passthrough, DTS passthrough, or auto passthrough.

    Please let me know. Thank you.
     
  6. lew

    lew Active Member

    3,955
    3
    Mar 12, 2002
    As per the PP you need to select AC3 passthrough.
     
  7. atomarchio

    atomarchio Member

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    0
    Sep 24, 2006
    When I select AC3 passthrough, it automatically changes my selection to DTS passthrough.

    It's also changing to DTS passthrough for any of the other "passthrough" options.

    Do I need to change another setting?
     
  8. atomarchio

    atomarchio Member

    716
    0
    Sep 24, 2006
    I used Hanbrake with the DTS passthrough as that was the only option it would allow.

    Here is the detail on the audio.

    Audio
    ID : 2
    Format : DTS
    Format/Info : Digital Theater Systems
    Codec ID : A_DTS
    Duration : 1h 40mn
    Bit rate mode : Constant
    Bit rate : 1 510 Kbps
    Channel(s) : 6 channels
    Channel positions : Front: L C R, Side: L R, LFE
    Sampling rate : 48.0 KHz
    Bit depth : 24 bits
    Compression mode : Lossy
    Stream size : 1.06 GiB (24%)
    Language : English
    Default : Yes
    Forced : No

    Is there any other setting in Handbrake I should try to improve this?

    Please let me know. Thanks.
     
  9. moyekj

    moyekj Well-Known Member

    11,141
    31
    Jan 23, 2006
    Mission...
    Source video doesn't have AC3 audio so passthru is not going to help. I don't think Handbrake can encode AC3 audio (only pass it through) so you may have to use something else like ffmpeg if you want AC3. Otherwise your best bet is to switch to 2 channel AAC using Hanbrake which will play properly via TiVo.
     
  10. atomarchio

    atomarchio Member

    716
    0
    Sep 24, 2006
    It does work but the spoken dialogue is quite low.

    What I am looking for is a way to get the audio playing through my center channel speaker? The spoken dialogue is very low and then I have to turn up the volume which causes the sound effects to be too loud.

    I have Aimersoft video converter will try that also. Any suggestions for resolving my issue?
     
  11. moyekj

    moyekj Well-Known Member

    11,141
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    Jan 23, 2006
    Mission...
    That's why I say if you are going to have AAC audio then you should make it 2 channel so that you can hear dialog properly. Basically with TiVo there's limited audio options: AC3 or 2 channel AAC (as you've seen >2 channel AAC doesn't really work properly), so if you are going to use AAC then 2 channel will guarantee that it works properly (assuming Handbrake encodes properly down to 2 channel audio).
     
  12. atomarchio

    atomarchio Member

    716
    0
    Sep 24, 2006
    What is the setting in Handbrake for 2 channel AAC? It defaults to AAC (faac).

    Should I change this setting to AAC (ffmpeg)?

    Do I need to change any other audio settings in handbrake?

    Please advise. Thanks.
     
  13. moyekj

    moyekj Well-Known Member

    11,141
    31
    Jan 23, 2006
    Mission...
    I haven't used HB GUI in a long time and don't have access right now but I'm pretty sure there are options somewhere to specifically set how many audio channels you want. (FAAC is fine)
     
  14. atomarchio

    atomarchio Member

    716
    0
    Sep 24, 2006
    The options are Automatic, None, Mono, Stereo, Dolby Surround, Dolby Pro Logic II, and 6 channel discrete.

    I am guessing Stereo would be 2-channel, right?
     
  15. lew

    lew Active Member

    3,955
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    Mar 12, 2002
    Handbrake has an option AC3 (ffmpeg). Would this work for the OP?
     
  16. moyekj

    moyekj Well-Known Member

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    Jan 23, 2006
    Mission...
    Sounds like it, yes. I guess it means it uses ffmpeg for AC3 encoding.
     
  17. atomarchio

    atomarchio Member

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    Sep 24, 2006
    I was able to do this with Handbrake. Is there a particular setting on my AV receiver that I should be using?
     
  18. moyekj

    moyekj Well-Known Member

    11,141
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    Jan 23, 2006
    Mission...
    If you have AC3 audio in output video then receiver should get Dolby and be good to go. I would try a short clip and check the output specs of the resulting video to make sure it has H.264 + AC3.
     
  19. atomarchio

    atomarchio Member

    716
    0
    Sep 24, 2006
    Here is the audio. Yes, I has AC-3 and Dolby Digital. It says L-R channel positions but I am getting audio out of my center channel.

    What are the settings I should be using on my receiver?

    Audio
    ID : 2
    Format : AC-3
    Format/Info : Audio Coding 3
    Format profile : Dolby Digital
    Mode extension : CM (complete main)
    Format settings, Endianness : Big
    Codec ID : ac-3
    Duration : 1h 40mn
    Bit rate mode : Constant
    Bit rate : 160 Kbps
    Channel(s) : 2 channels
    Channel positions : Front: L R
    Sampling rate : 48.0 KHz
    Bit depth : 16 bits
    Compression mode : Lossy
    Delay relative to video : -83ms
    Stream size : 115 MiB (7%)
    Language : English
    Encoded date : UTC 2012-09-14 19:26:37
    Tagged date : UTC 2012-09-14 19:58:21
     
  20. moyekj

    moyekj Well-Known Member

    11,141
    31
    Jan 23, 2006
    Mission...
    I think you're good to go as is though are you sure you can't get 6 channel AC3 using ffmpeg? (Could be ffmpeg AC3 encoding can only do 2 channel).
     

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