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-   -   Audio way out of sync on PAL to NTSC conversion (http://www.digitalfaq.com/archives/audio/9826-audio-sync-pal.html)

jshew 05-24-2004 04:56 AM

audio way out of sync on PAL to NTSC conversion
 
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?

Boulder 05-24-2004 05:57 AM

It indicates that you didn't do the same conversion to audio.

glent2k3 05-24-2004 06:07 AM

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

Dialhot 05-24-2004 10:05 AM

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 !

jshew 05-24-2004 07:41 PM

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??

Dialhot 05-25-2004 07:06 AM

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.

jshew 05-25-2004 05:29 PM

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?

Dialhot 05-26-2004 05:13 AM

simply open then in wmp :!:

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


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