divx with vbr mp3 to dvd sync problems

Discussion in 'MPEG-1 and MPEG-2 encoding (AVI to DVD)' started by rawsy, Jun 14, 2005.

  1. rawsy

    rawsy Member

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    hi all i am not completely new to encodeing and have tried everything i could think of to solve this problem this is my last resort. i have a divx video with vbr mp3 audio. i have tried useing virtualdub to save a wav file of the audio but can anly get a file 4X shorter than it should be. i have also tried decompresse.exe which only gives me an avi file with out of sync decompressed audio. when i demux the audio it becomes out of sync before i have tried encoding it seperatly. here are the details:
    Video stream
    frame size,fps (ms per frame) 640x352,25.000fps (40000us )
    length; 63626 frames ( 42:25.04 )
    fourCC code: fourCC : [DIV3]
    low motion DivX MPEG-4[DivX 3.11[
    Decompressor; DivX;-)MPEG-4 Low-Motion
    number of key frames; 553
    min/avg/max/total key frame size;1107/18345/84305 (9908K )
    min/avg/max/total delta frame size;112/4786/78061 (294833K)
    data rate;981 kbps (0.49% overhead )
    Audio Stream sampling rate;48000Hz
    channels;2 (stereo)
    sample precision;N/A
    audio tag; tag:0x0055,ACM Decodable
    MPEG-1 Layer(MP3)
    compression; Fraunhofer ||SMPEG Layer-3 Codec
    layout; 63626 chunks (1152|0.02s preload)
    lenght;106043 samples (42:25.03)
    min/avg/max/total frame size 96/480/576 (29849K)
    data rate;160 kbps (4.76% overhead)
    i hope there is someone who can help please

     
  2. aldaco12

    aldaco12 Active member

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    The problam is that stream is NOT 44.1 kHz CBR but 48 kHz and, maybe, ACm. This migh the reason for the 'WAV' being small (if your pC is unable to decompress the stream it creates a 'fake WAV' that is a pure demuxed stream simply renamed.
    Suggestion:
    - use VirtualDubMod
    - do Stream ___ Stream List ___ DEMUX (you should have the correct stream type name, now)

    Start HeadAC3he and open the file.
    Choose as Destination Format: WAV. Since you're creating a DVD (48 kHz), probably you don't have to check the box 'resample to 44.1 kHz', you should check it if you made a (S)VCD.
    Later you'll make your DVD audio stream during authoring, by loading that WAV.
     
  3. rawsy

    rawsy Member

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    Thanks for your reply i will post my results
     
  4. rawsy

    rawsy Member

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    thank you so much your suggestion worked a treat
     

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