Strange Motion Behavior in NTSC Movie!

[cyberafv]

Last week i ripped "The Relic" using DivX 5.02 Pro , but i discovered one strange video problem: the motion across
my ripped movie seems "un-natural" i mean...like frames skipping
in some sections, split second frozen scenes...and all kind
of strange behavior, anything but normal. This movie is NTSC
and i suspected that it was an error i created after de-interlacing
the video stream, but it isn't. It is, however, the first time i ever
found this weird result in a ripped video stream and it never happened using Wide-screen versions. I'm using:

DivX 5.02 Pro CODEC
Xmpeg 4.5 (just for the video stream)
Virtual Dub Mod (for de-interlacing)
VOB Merger (don't know version)
Win XP Pro

What is going on when i'm encoding my video?
Am i doing something wrong?
What can i do to fix this trouble?
:confused:

[setarip]

"Xmpeg 4.5 (just for the video stream)
Virtual Dub Mod (for de-interlacing)"

Try using MPEG Mediator (which includes automatic deinterlacing) instead...

[scottws]

Sounds like you used the wrong inverse telcine mode. You might have used "top field first" when you should have used "bottom field first" or vice versa.

I suggest using DVD2AVI. When you load up the VOBs, press F5. A status window will open up to the right of the video, telling you important information such as the framerate, progressive or interlaced, and the aspect ratio. If the type of video reads FILM and 29.97fps, then you can use the "forced film" feature inside DVD2AVI. This will automatically convert it to 23.976fps.

This is only if the video is progressive though. If it's interlaced, that's a whole other matter. But most DVDs are progressive.

[cyberafv]

Scottws:

Well, thanks for your suggestion, but the video stream
for these VOBs is indeed interlaced: XMpeg 4.5 detects it.
Even so, i'm gonna try using DVD2AVI to check the status
window. The last time i found a jerky playing in a ripped
movie i decrypted the VOBs again using Vstrip and after
encoding, everything came out fine. I used DVD Decrypter
then and now, and i can tell you: it's a very easy to use
software but it's not flawless decrypting every kind of DVD...
;)

[scottws]

XMPEG shouldn't even be used if a video is interlaced. As far as I know, the "deinterlace" feature in XMPEG 4.5 doesn't even do anything.

Okay, it's interlaced. Doesn't matter, really. Just follow this guide (http://www.divx-digest.com/articles/dvd2avi.html).

I know this (http://www.afterdawn.com/articles/archive/dvd2divx_anamorphic.cfm) isn't a DivX-Digest article, but it's helped me out tremendously.

[cyberafv]

scottws:

I think you don't understand: i'm not using XMPEG 4.5
for deinterlacing, i never said that. I'm using it for
detecting interlaced video streams, but, as you
suggested, i already confirmed the interlaced status
using DVD2AVI in the "preview" window. I'm gonna
check your guide, even when i discovered that
the jerky playing is caused by changing the original
video rate 29.97 fps to 23.976 fps within XMPEG,
since i did some testing. I fixed this encoding the
video and deinterlacing using MPEG Mediator and
later changing to 23.976 in Nandub and it's smooth
now, but when muxing with MP3 stream now it's
totally out of synch. So, as you can see, my
problem got nothing to do with de-interlacing at all...

:cool: