Quantcast Audio Way Out of Sync on PAL to NTSC Conversion - digitalFAQ.com Forums [Archives]
  #1  
05-24-2004, 04:56 AM
jshew jshew is offline
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On a PAL to NTSC conversion. Did framerate conversion in Script (Moviestacker). Converted the WAV file in BeSweet but when multiplexed with the video the audio begins about 2 secs ahead of the video and just gets progressively worse. Getting to about 2 1/2 minutes ahead after about 60 minutes runtime. What does this seem to indicate?
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  #2  
05-24-2004, 05:57 AM
Boulder Boulder is offline
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It indicates that you didn't do the same conversion to audio.
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05-24-2004, 06:07 AM
glent2k3 glent2k3 is offline
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your source will be 25fps(0riganl)
to encode to 23 or 29 (to match the video)you have to check to box and select the preset you need. IF you still have a small delay then mux with mplex and delay the audio in the settings tab
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05-24-2004, 10:05 AM
Dialhot Dialhot is offline
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Quote:
Did framerate conversion in Script (Moviestacker). Converted the WAV file in BeSweet
And did you do also the framerate conversion for the AUDIO in besweeet ?

Note: I hope you are going from 23.976 and not from 29.970 !
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05-24-2004, 07:41 PM
jshew jshew is offline
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Yes, the soure is 25.000 fps. I encoded the video with a Moviestacker script, with format conversion selected and the output is 23.976 fps. The audio I did in BeSweet, using the WAV file and doing a framerate conversion from 25.000 to 23.976. The Besweet Log file showed it was successful, so I'm confused??
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  #6  
05-25-2004, 07:06 AM
Dialhot Dialhot is offline
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Check the length in seconds of the wav, the one of the mp2 and the one of the encoded video.

MP2 must be = to video.
And wav should be exactly (length of MP2*23.976/25).

If you don't have this, you did something wrong.
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  #7  
05-25-2004, 05:29 PM
jshew jshew is offline
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What programs would work to check the length of the encoded video, which is a .m1v file (or is it mpeg) out of TMPGEnc? And to check the length of the .mp2 and original .wav?
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  #8  
05-26-2004, 05:13 AM
Dialhot Dialhot is offline
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simply open then in wmp

(if the length seems not correct for the m1v, you can use avicodec for it).
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