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Old 29th September 2008, 18:25   #1  |  Link
lithiumus
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Join Date: May 2008
Posts: 70
Audio sync problems converting 29.9fps to 23.976fps

I have captured some video @ 1080 60i and I'm trying to convert it to 23.976fps but I'm having audio sync issues. I'm using Megui and trying Avisynth settings...

- ConvertFPS(24000,1001)
- tfm(order=1).tdecimate()
- TDecimate(cycleR=0)

All of which result int varying degrees of audio sync issues where the audio is synced initially and goes out of sync being gradually more and more delayed. The second option had the audio go out of sync very quickly. When I use Megui to detect the source it usually shows Progressive even though various other tools detect it as 60i, Megui sees 29.97 fps.

Any suggestions on how to ensure the conversion results in synced audio?
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Old 29th September 2008, 18:53   #2  |  Link
lithiumus
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Join Date: May 2008
Posts: 70
Please let me apologize for not reading enough. I had spent quite some time reading but I may have been reading some old information.

I just found a thread talking about using FDecimate and I read up on it and it seems to be a good option.

The AVS script someone used was something like this...

LoadPlugin("your path to plugins\DGDecode.DLL")
LoadPlugin("your path to plugins\FDecimate.dll")
MPEG2Source("yourpath\yourfile.d2v")
ConvertToYV12()
FDecimate(rate=23.976,threshold=3)

Determining the threshold sounds like a manual task so I assume it will need to be done for each source.
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