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virtualdub audio sync issue
#1
05 Dec 2010 @ 8:37
slizzzer
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Newbie
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?
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#2
05 Dec 2010 @ 11:23
attar
AfterDawn Addict
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.
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.
This message has been edited since its posting. Latest edit was made on 05 Dec 2010 @ 11:24
#3
06 Dec 2010 @ 9:49
Originally posted by attar:wow thanks for the detailed information...it worked!
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.
audio was off by +6500ms
#4
06 Dec 2010 @ 13:42
attar
AfterDawn Addict
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.
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