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afterdawn.com > forums > digital video > video - software discussion > tmpgenc motion jitter
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TMPGEnc Motion Jitter
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Peamasii
Newbie
_ 		14. July 2004 @ 04:19 _ Link to this message    Send private message to this user   
Hello, I've been ripping and encoding for some time with SmartRipper 2.41/DVDAVI 1.77.3/TMPGEnc 2.58 and I'm having trouble with one aspect: motion jitter.

This is especially noticeable with PAL sources, I don't really even notice it with NTSC. It looks like every moving scene is broken into little jumps on the screen, for example, a car that crosses the screen looks like it makes about 4-5 jumps, the motion is not smooth. It makes the produced clips unviewable.

I use primarily VBR and data rate over 2 MB/sec. The quality of the output is very clean indeed. The settings I tried so far for motion in Advanced, were Normal and Motion Estimate Search. I haven't tried the Slow and Real Slow Motion search algorithms, primarily because it would take too long but also because I don't see this problem much in NTSC.

Is there something I'm missing here? I noticed in DVDAVI that PAL sources are running at 20 fps when choosing Forced Film. NTSC sources have a higher fps. Should I not use Forced Film for PAL? Is that the reason for this jumpiness in the motion? It's really bugging me that I can't tweak this right, and I haven't been able to find other posts here about this problem. I don't want to have to try every little thing, I'm sure someone must have run across this before.

Can anyone make some comments on this? TIA
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Peamasii
Newbie
_ 		14. July 2004 @ 09:26 _ Link to this message    Send private message to this user   
I got it. It was the Forced Film option in DVDAVI. I have no idea why I always had that on, I think it was mentioned in the SVCD Faq.
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Dela
Staff Member
_ 		14. July 2004 @ 09:40 _ Link to this message    Send private message to this user   
A change in framerate using TMPGEnc produces that little freeze ye. Its not even that big of a freeze but as an encoder you would notice it a lot!
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jiggy2
Newbie
_ 		17. July 2004 @ 10:36 _ Link to this message    Send private message to this user   
I've got the same problem with a particular movie, but I don't use DVDAVI, I only use TMPGEnc Plus. Is it possible to overcome this problem, or can't TMPGEnc Plus fix this problem? Can anyone help me?
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Dela
Staff Member
_ 		18. July 2004 @ 01:54 _ Link to this message    Send private message to this user   
Basically it should be ok if u keep the source framerate. You can try other encoders like Canopus ProCoder 2, which has gotten great reviews behind it now!
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Peamasii
Newbie
_ 		18. July 2004 @ 14:07 _ Link to this message    Send private message to this user   
OK, so this is what works fine for me to prevent motion jitter problems:

DVD2AVI: use forced film for NTSC, not for PAL. This always should end up as a 25 fps frameserver output.
TMPGEnc: Normal motion search algorithm, of fast Estimate. Either of those is fine for most movies. De-interlace and filter (usually Double) is only necessary on NTSC sources, on PAL sources I find that even if Interlace is detected, no filter is needed on most new sources (except for old movies which are always interlaced).

Good luck and happy encoding!
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This message has been edited since posting. Last time this message was edited on 18. July 2004 @ 14:07
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pfrancino
Newbie
_ 		23. July 2004 @ 14:30 _ Link to this message    Send private message to this user   
i had same problem for quite a while. not with all the sesions, and could not predict which ones would and which not. i got rid of the trouble by using 2pass VBR instead of CBR in TMPGEnc.

RGDs.
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