1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

virtualdub audio sync issue

Discussion in 'Video playback problems' started by slizzzer, Dec 5, 2010.

  1. slizzzer

    slizzzer Member

    Joined:
    Dec 5, 2010
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    11
    dont know if this is the right forum but newbie here......i have a dubbed movie in a foreign language that is perfectly synced for the 1st 30 mins or so then audio is out of sync. VBR audio is being used. apparently virtual-dub can only fix audio that is continuously out of sync and will not fix the problem without a special filter. anyone have any solutions?
     
  2. attar

    attar Senior member

    Joined:
    Jun 17, 2005
    Messages:
    11,147
    Likes Received:
    41
    Trophy Points:
    128
    Is the audio out of sync a constant value after the thirty minute mark?
    If so you could select the good part (must be on a key frame) then 'Edit > Crop to selection' and save it as part 1 using 'Video > Direct stream copy'.
    Undo the Crop and select from the same key frame to the end.
    Go to 'Audio > Interleaving' and insert a 'Skew' value.
    If you estimate the audio is leading the video by half a second, insert a negative value of 500 and play the video.
    When satisfied, save part 2 and exit VirtualDub.
    Restart VirtualDub and load part 1 then 'Append' part 2.
    Select 'Video > Direct stream copy' and save.


    Edited for clarity.
     
    Last edited: Dec 5, 2010
  3. slizzzer

    slizzzer Member

    Joined:
    Dec 5, 2010
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    11
    wow thanks for the detailed information...it worked!
    audio was off by +6500ms
     
  4. attar

    attar Senior member

    Joined:
    Jun 17, 2005
    Messages:
    11,147
    Likes Received:
    41
    Trophy Points:
    128
    I don't know if you were aware, but if you use MPC as your media player, you can use the + or - keys on the number pad to bring the audio into sync during playback (the value is shown onscreen) - you can then transfer that skew value into VirtualDub, which removes the guesswork.
     
  5. slizzzer

    slizzzer Member

    Joined:
    Dec 5, 2010
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    11
    i use VLC, i'll try it out though
     

Share This Page