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Pegasys Products BBS [ Sorted by thread creation date ]
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Question TE25 20 fps avi conversion ellison93 5 2002-07-15 14:06:25

Pegasys Products BBS [ Sorted by thread creation date ]
Question - TE25 - 20 fps avi conversion No.24813
ellison93  2002-07-13 17:20:00 ( ID:mbxkp6yezda )   [ Delete / Reply with quotation ]

Is there a simple way to convert a 20 fps avi file to VCD format? Do I have to worry about audio sync?


ASHY  2002-07-13 17:22:52 ( ID:4adzcnohuc. )   [ Delete / Reply with quotation ]

I'll give you the simple answer, no.

It involves a few steps and two other pieces of software. Virtual dub and Cooledit.

But it's not really that much of a big deal if you really want this conversion.

ASHY


ellison93  2002-07-13 20:28:41 ( ID:mbxkp6yezda )   [ Delete / Reply with quotation ]

THanks. I do have the two software packages. I would reall appreciate any help you would be willing to give. Thanks again.


ASHY  2002-07-14 15:50:17 ( ID:n3gjkhi6dvc )   [ Delete / Reply with quotation ]

The only way is to change the framerate of the original AVI.
First you will have to extract the audio to a wav file using virtual dub.
Load the AVI file into virtualdub and extract the audio to a wav.
Next change the framerate to the one you want. When you do this note the time in the box at bottom right exactly and then convert it to seconds. WRITE THIS DOWN, you will need it later.

Close Virtualdub and download Cooledit 2000.
open Cool edit 2000.

When the program opens you will be presented with a box allowing you to choose 2 options. Choose options 1 and 3.

In the program click file>open and open the wav you created earlier.
Wait for it to finish then click 'Edit' and untick 'enable undo' then click 'select entire wave' next click 'Transform' and choose 'Time/pitch' from the drop down menu then click 'stretch'
In this box tick the following options:

Low precision
Time stretch (preserves pitch)

In the box that says 'Length' type in the exact figure you got in secs from Virtualdub for e.g. 4802.360 then click ok.
Wait for the program to do it's stuff then when its finished click 'file' then 'save as' and name and save your file as a wav.

This should give you a Wav file which will be the same length as the movie in the next step. Close Cool edit 2000.

To change the framerate of an AVI all you need is this program.
http://www.divx-digest.com/software/avifrate.html

Change it to the framerate you want then load your AVI and your new wav into TMPG and encode as normal using the VCD PAL template.

Note: you may check that the audio is in sync with AVI by multiplexing the files with Virtualdub first.

ASHY


ASHY  2002-07-14 19:26:52 ( ID:4adzcnohuc. )   [ Delete / Reply with quotation ]

Note to the above.
The suggestion of the VCD PAL template is only for use if it is relevant to your TV system. If not choose whichever template suits your system.

ASHY


ellison93  2002-07-15 14:06:25 ( ID:tewljaqqlcl )   [ Delete / Reply with quotation ]

Many thanks! - I am anxious to give it a try.



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