Filesharing Software → Jerking in my Encodes

I encoded a 90 minute movie using DivX 4. The encoding process went by smoothly, and when I tested out the playback it was just fine in the beggining. However near the middle, and ESPECIALLY towards the end, the picture jerks like mad! I mean serious frame issues where it looks like it on a vinyl record rocking back 'n forth very radpidly. I assume it's a gradual thing since the begging is fine, the middle is worse, and the end is horrible! (This was all done using VirtualDub). I then gave NanDub a shot thinking that this would resolve the problem. Once again I get the same trouble. I know for a fact that it isn't the VOBs ripped from the DVD, since they playback perfectly with my DVD software.

Anyone have a slightest clue as to what this may be?

-Tornberry

Here are some smaples. s1 takes place in the begining. Notice no jerking? s2 takes place in the end. Notice that crappy jerking?

I read somewhere, I think maybe on one of Doom9's guides, that rarely some movies will start out mostly film/progressive and then change to interlaced. You might run it through DVD2AVI's preview mode and see what it reads when it gets to the parts you're having problems with. Probably not it, but worth looking at.

said by Chemcat:

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I read somewhere, I think maybe on one of Doom9's guides, that rarely some movies will start out mostly film/progressive and then change to interlaced. You might run it through DVD2AVI's preview mode and see what it reads when it gets to the parts you're having problems with. Probably not it, but worth looking at.

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So are you saying this is a DVD2AVI issue? Not VirtualDub or the actual ripping of the VOBs? I tried looking around the film with DVD2AVI, but I can't tell if it's ruined just by looking at single frames. How am to fix this problem none-the-less? I do notice that when I'm saving a project with DVD2AVI, the bar indicates that it switches from progressive to interlaced every split second! So now I'm just about lost. I sort of feel like I'm just star-crossed with the encoding curse.

-Tornberry

It looked like a field-order problem... I'm not really familiar with DivX encoding, but here's what I would try first... In DVD2AVI, set the Field Operation to None. If it was set like that before, try setting it to Swap Field Order. Try another deinterlacing method in VD if your still having problems...

I have no idea what the problem might be, I was merely suggesting what may be a possibility. As for how to correct it...I'm afraid I wouldn't know. I'm pretty much a neophyte to ripping, converting, and encoding in general and am learning as I go. I'm sure you know a lot more about this stuff than I do. I just remembered reading that article/guide on interpreting DVD2AVI statistics (I wish I could remember where):D. It certainly sounds strange that DVD2AVIs statistics are jumping like that, never seen that in my limited experience. If your film is partly progressive and partly interlaced this might cause problems with halting and jerking in parts, no? Maybe you could get an answer on Doom9's or Vcdhelps forums if you can't get one here.. Good luck with find the solution I'm sure I'll run into something like this one day myself.