Why in the hell does this happen???!!!!!!

[thebach]

I encode DVD's to SVCD using DVD2AVI and TMPG. Why is it that one out of ten or so come out with motion problems when all the others don't even with the same settings? Going to VCD with these DVD's helps, but you can still see there is trouble. What is different about some of these DVD's where they don't want to encode, and what can you do to fix it?

[grayart]

I hade the same problem
When i converted NTSC 29.976 fps DVD to vcd or svcd the motion was terrible.

Then i had found a DVD to SVCD Guide on some site , that talked about this problem.

There it said , that when encoding with DVD2AVI from a NTSC 29.976 fps DVD you MUST choose the option force film at the DVD2avi - video menu.
it will convert the project to 23.976 fps and make the movie play smoothly.


I hope this helps.

[VidGuy]

It's NOT terrible if you encode it as an interlaced video at 29.976. The problem comes in when you try to encode a 29.976 NTSC video as non-interlaced. It also occurs if you do not set which field is dominant/first (i.e. the "top field first/bottom field first" setting of TMPGEnc). If you use "force film" from DVD2AVI when the movie is more than a couple of % NTSC - you will not like the 23.976 fps results - then you either inverse telecine manually (if it's possible), or you encode interlaced. If it's interlaced and the motion looks bad, swap the field first setting.

Also, bear in mind that interlaced video on a PC generally looks bad because PC screens aren't interlaced, but they'll look really good on a TV.

[ktnwin]

Well, some of the videos are encoded with odd field first and some with even field first. I ran into same problem last weekend.
I encode lot of clips and burn all those MPEGs as SVCD then play it. Some of the clips look very good and some of them has choppy motion. All encoded with the same template !!!
All I have to do is to re-encode the bad one with the opposite choice of odd/even field.

[WMike]

There is a guide on how to check for field order. Even though 99% of the time, the field order is consistent, sometimes it's different (for whatever reason). I check it EVERY time I do an encode.

The method is basically to (in TMPGEnc) go to "Advanced" and open the "Deinterlace" filter. In the "Method" area, set the preference to "even-odd" field setting. Then find a portion of the video with motion and step the video through some frames. If the video jerks back and forth, then you need to reverse the set field order. When you are finished checking, close the deinterlace filter dialog and leave it off (it's only for checking).

Like I said, you'll get the occasional odd video where the order is different than what you typically have (just had this the other night).

Mike