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Old 14 Jul 2003, 12:40 AM   #1
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Default Differing time before/after encode

Sorry if its in the wrong place, but can anyone tell me why a film encoded with DivX at 1hr 45 mins , after being run through DVD2SVCD ready for DVD encoding , becomes 2hrs 4 minutes pls?

Thx.

Messa
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Old 15 Jul 2003, 02:18 PM   #2
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Those numbers look suspiciously like a frame rate problem.
For example, if an NTSC avi at 29.97 was encoded at 25fps (PAL)
but the "frame rate" wasn't converted, it would end up
being longer by approx 119%.
That is pretty close to the numbers you gave.

That's all I can think of for now.
Dave
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Old 16 Jul 2003, 04:36 AM   #3
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Thanks Dave, I see what you mean and yes it does look like what you say (I am converting an NTSC to PAL).

Is there a setting in AVI2SVCD that I am missing (using Cinema Craft Encoder btw) to force the film to remain at the original length do you know?

Or for that matter, another way of converting AVI's to DVD compliant files? ( I have tried TmpGenc and the framerate difference from NTSC to PAL causes terrible 'juddering')

Thanks,

Messa
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Old 16 Jul 2003, 06:09 AM   #4
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Not sure - does CCE do frame rate conversion?
Perhaps that's the problem.

What is the source 29.97 movie (progressive) or 29.97
TV (interlaced).

If it's movie, you can convert it 23.976 by removing the duplicate frames. The "telecide" and "decimate" filters can do this.
(Virtualdub)

Once you have done this, spin off the audio and use sound forge
or other wav editor to shorten the audio so that it is
23.976/25 or 95.9% of the original.

Frame serve the 23.976 avi to tmpgenc.
In tmpgenc choose the relevant PAL template, and choose
the shortened audio.

In the tmpgenc "settings"/advanced page, select
"do not frame rate conversion"

I have never tried this, but it should work.
I have often done it the other way PAL > NTSC
making the audio *longer* by 104.27 (25/23.967)
and then viewing on my NTSC TV. It works well.
Good luck
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Old 16 Jul 2003, 08:10 AM   #5
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Thanks for the help Dave, I won't be able to try your suggestions 'til tomorrow or maybe Thursday, but will let you know.

Thanks again,

Messa
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