Getting Rid of Interlace Jitters?

[TenaciousJP]

Whenever I re-encode something that is interlaced, I get some jitters in the playback.

The audio is fine, and in sync, and the video looks great as well. However, when there are moments of motion, such as people moving, or camera pans, the picture jitters.

How can I get rid of these jitters?
Thanks in advance!

-J.P.

[TenaciousJP]

Forgot to mention, I only get the jitter problems when viewing on a television, not on the computer.

-J

[wy685mm]

If you use TMPGEnc to encode, double-check your settings. I did a R1 DVD and then a R2, had the same problem you describe.

I then checked the settings in TMPGEnc and tried again. I found that I had forgotten to change one setting back from NTSC to PAL. Hey Disco, it worked fine!

[TenaciousJP]

Thanks for the advice! I never encode PAL, however.

After doing some more reading, I found that it might be due to the field order. I never touch that setting, and always leave it as defaulted:

Bottom Order (B)

Should I change that? Is there anyway to tell what order my interlaced movie uses?

-J

[wy685mm]

to be honest I don't know. As it happens I've just had the same problem trying to encode The Best of Bowie DVD's with TMPGENc, and I've noticed that for some tracks the edge of the subject in the picture is wavy and jagged.

I don't suppose anyone knows how to fix this? I think it has something to do with the way the original material was recorded as I had exactly the same problem trying to copy Fawlty Towers, but couldn't get around it.

[Fredd]

However, when there are moments of motion, such as people moving, or camera pans, the picture jitters.

Do you mean the image goes back and forth? This is the problem I have on one video. When I look at the original material (TV capture in MJPEG) in virtualdub and stop playback, some sequences show interlaced regions though the rest seems deinterlaced.
So I think something wrong occured during the capture, maybe the field order has been melt. When I encode these parts, image jumps backward/forward while the rest shows "normally".
The solution I had was to deinterlace within TMPGenc (I found it deinterlacing better than those I have in VirtualDub).

[_fester_]

I got the same problem multiple times, when the source file contains some amount of interlaced frames. Does it look like you are on drugs watching a film? With jittery motion that kinda trails? Some movies are hybrid, you can see if you look at the stats bar on DVD2AVI (it looks like it goes real quick between Progressive and Interlaced, like its flickering). My way around these fils is to make sure I encode (CCE 2.5) with these settings:

add sequence On

Upper field On (but it really depends on the source(use bitrate viewer to get the stats of the ORIGINAL m2v or vob) if it is interlaced, if its hybrid use top first) Probably the most important if you are using interlaced source(which in the case of concert videos, it almost always is from my experience

Progressive Frames On
Linear Quant scale on
Zig zag ON
DVD compliant ON

Good Luck

_rotting_in_the_corner_ ITS FESTER

Its essential for interlaced video that you set "top frame first" correctly. You can use bitrateviewer. I'm not 100% sure, however, whether it gets this right. Usually .... Most often ... NTSC is created without "top frame first". PAL on the other hand usually is top frame first.

If you get "top frame first" wrong you will end up with a jittery video. Reencode and everything will be ok.

To my knowledge DVD2SVCD gets this right automatically. It also sets "force film" automatically. Both of these options can cause your videos to have the jitters.

[TenaciousJP]

Thanks for all the help!

I'll try your suggestions out.

-J.P.

[jmbuis]

in order to get rid of the jitter, you have to set the "Field order" parameter right in tmpgenc video source settings

there is a cool link (thanks to the author btw) to find out whether you had it right or wrong :

http://hilljack.vampirez.com/fieldorder.htm

[burychka]

Bingo. I just encountered the same jittery video problem. I use Smart Ripper, DVD2AVI, TMPGEnc, and finally HP's bundled version of MyDVD. So many places for things to have gone wrong. I almost gave up gin, until I found your post.

jmbuis and the link:
http://hilljack.vampirez.com/fieldorder.htm
were the answer.

The DVD (NTSC) template in TMPGEnd uses the B frame first. Switch to A frame and everything is fixed. The link above is indeed to a most cool use of the TMPGEnc settings device to tell you whether A or B is the answer.

Thanks, jmbuis and HillJack!