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  1. Hi there,

    This is my first post. Some one send me mp4 videofiles and the files work perfectly at her computer. But: at mine there is no sound/audio or on some files just less and very quiet. I tried to convert, i played it with VLC. The problem seems that there are more audio tracks and the most important track does not work.

    I have codecs installed: AC3, ffshow, OGds. I want to edit the files in Premiere Elements 10. That's all I tried, so I hope you have al the information to give me the best advice.
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  2. Member
    Join Date: Mar 2011
    Location: Nova Scotia, Canada
    Search Comp PM
    vlc doesn't need any of those silly external codecs to play mp4 audio.

    Install mediainfo, open the file, post info from the text view mode.
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  3. Thanx, i think you need this information?

    General
    Complete name : C:\Users\Johan Stevens\Videos\174_8274_01.MP4
    Format : MPEG-4
    Commercial name : XDCAM EX 35
    Format profile : Base Media / Version 2
    Codec ID : mp42
    File size : 287 MiB
    Duration : 1mn 5s
    Overall bit rate mode : Variable
    Overall bit rate : 36.6 Mbps
    Encoded date : UTC 2012-09-19 02:09:54
    Tagged date : UTC 2012-09-28 11:59:41

    Video
    ID : 1
    Format : MPEG Video
    Commercial name : XDCAM EX 35
    Format version : Version 2
    Format profile : Main@High
    Format settings, BVOP : Yes
    Format settings, Matrix : Custom
    Format settings, GOP : M=3, N=12
    Codec ID : 61
    Duration : 1mn 5s
    Bit rate mode : Variable
    Bit rate : 35.0 Mbps
    Width : 1 920 pixels
    Height : 1 080 pixels
    Display aspect ratio : 16:9
    Frame rate mode : Constant
    Frame rate : 25.000 fps
    Standard : Component
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Interlaced
    Scan order : Top Field First
    Compression mode : Lossy
    Bits/(Pixel*Frame) : 0.675
    Stream size : 275 MiB (96%)
    Language : English
    Encoded date : UTC 2012-09-19 02:09:54
    Tagged date : UTC 2012-09-19 02:09:54
    Color primaries : BT.709
    Transfer characteristics : BT.709
    Matrix coefficients : BT.709

    Audio
    ID : 2
    Format : PCM
    Format settings, Endianness : Big
    Format settings, Sign : Signed
    Codec ID : twos
    Duration : 1mn 5s
    Bit rate mode : Constant
    Bit rate : 1 536 Kbps
    Channel(s) : 2 channels
    Sampling rate : 48.0 KHz
    Bit depth : 16 bits
    Stream size : 12.0 MiB (4%)
    Language : English
    Encoded date : UTC 2012-09-19 02:09:54
    Tagged date : UTC 2012-09-19 02:09:54


    It's seems that my pc can't read audio stream two!
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  4. Member bat999's Avatar
    Join Date: Feb 2008
    Location: United Kingdom
    Search Comp PM
    Originally Posted by Johan1412 View Post
    Audio
    ID : 2
    Format : PCM
    Format settings, Endianness : Big
    Format settings, Sign : Signed
    Codec ID : twos
    Maybe VLC Media Player isn't happy to play PCM audio in an mp4 file.
    Try a different media player, such as SMPlayer.
    From here ---> http://smplayer.sourceforge.net/
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