jerky playback on movies backed up w/ VDM

[syc0pathic]

This has happened on most movies I've backed up. It's most noticeable when there's a wide, sweeping shot of a location. Instead of a nice smooth pan of the camera, it seems to be jerky. Here's my V-Dub settings under the Video menu:

Filters = resize (Precise bicubic (A=-0.75))
Framerate = Source rate adjustment is No change, Inverse telecine is set to Reconstruct from fields - adaptive

I use Xvid w/ the default settings for Profile, Quantization, etc.

I could post a clip if someone can suggest a site to host it.

[communist]

Framerate = Source rate adjustment is No change, Inverse telecine is set to Reconstruct from fields - adaptive
Do you know what this setting does or why are you using it? If its progressive encode as such - if its telecined do an IVTC etc.

[syc0pathic]

Do you know what this setting does or why are you using it? If its progressive encode as suchDamn, I can't believe I missed that... I backed up some of my TV-on-DVD collection, and I must have changed that setting then and forgot to change it back. D'oh! Looks like I'll be re-ripping about 30 of my DVDs:angry:

[syc0pathic]

Ok, well now I remember... I tried encoding a sample w/ the settings I posted here, as well as w/ it set to progressive. W/ the progressive setting, there are noticeable scan lines during times of quick motion or when changing from 1 camera angle to the other. Also, the progressive setting results in an end file that has a 29.97 framerate, whereas the settings I have here give 23.97. Isn't 23.97 the correct rate? Now that I have looked into this some more, I remember that I experimented w/ the settings when I 1st started backing up movies, and this gives the best results. But obviously it's not perfect, becuz of the jerky playback during camera pans. Should I be using a different filter (ie, deinterlace or something similar)?

[communist]

You need to use the apropriate process for each movie - I'm not an expert on these issues but if you have (truly / pure) interlace source you will have to deinterlace (before or after encoding if you plan on watching it on a PC screen). If you have telecined source (2 progressive frames, 3 interlace ones) then you can IVTC them from 29.976 down to the original film frame rate.

Take a look at these threads:
http://forum.doom9.org/showthread.php?t=52332
http://forum.doom9.org/showthread.php?t=96362

[syc0pathic]

Thanx for link... that was very informative, even a little TOO informative;) What I basically took away from it was that it requires a lot of time to figure out exactly what to do for each film for perfect playback. Considering that these are just backups and I'll be watching the DVD most of time, and the fact that most people don't even notice even after I point it out, and the fact that it only happens in sweeping camera moves, I really don't think it's worth all the extra time that it would require to make it perfect. But I do have a better understanding now of why it happens. Thanx!