divx5 and virtualdub - massive cutting problem

[((( atom )))]

i have massive problems with cutting divx5-files in virtualdub.
i was wondering if i am the only one with this problem since i never saw a post on that topic.

although vdub is supposed to correctly work with b-frames, it simply doesn't, at least with me and for a while now. the problem even survived several new-installations of windows xp in the past few month, so i am sure it is vdub and nothing in my system..

whenever i try to cut a file, i have to try at least 10 times to actually cut it where i wanted it to. it never cuts at the frame beiing displayed.

does anybody know a solution, maybe a different cutting-tool or something? important to me is, that i can visually choose where to cut the file, because i hate movies that are beeing interrupted in the middle of a conversation or music or whatever shouldn't be interrupted.

/jc

[Swede]

You're problem might be that you are not cutting at keyframes. Since every avi *must* start with a keyframe, vDub moves your start backwards until it finds one.

[((( atom )))]

i am cutting on keyframes of course, forgott to mention..

[jggimi]

Could this be a vbr mp3 or ac3 audio issue -- that is, should you be using Nandub?

I use a front-end to Nandub: "aviSplitCalc". Works great.

[((( atom )))]

when i go for 2cd-encodes, mostly, because i use ac3 for that particular movie, wich neither virtualdub nor nandub can play back.

avisplitcalc sounds interresting, i will try it out.
i never used nandub for the actual cutting again, since it doesn't support b-frames at all, but i will give it a try with this tool..

[jggimi]

Try following Doom9's splitting guide with Nandub; direct stream copy seems to work fine with B-frames.

[manono]

Hi-

I think you're supposed to use the latest Version 1.4.10.0 which supports B frames.

[((( atom )))]

although vdub is supposed to correctly work with b-frames ... ...means i /am/ using 1.4.10.

are all of you happily cutting divx5-movies scene-exact without problems??

[FactorM]

I cut my movies with 2 vbr mp3 or AC3 in Nandub without any problems.

[((( atom )))]

hmm, atm cutting moulin rouge really pissed me off. i tried with nandub now - same problems. whenever i cut at a scenechance where eg someone starts a sentence right at that change, the word "confessing" comes out as "ssing", whatever i try.. watching the movie, it looks like it would exactly start at that keyframe, but maybe my impression just fools me here.. the movie is cut extremely often and fast, so this might be the case. i will try cutting the .avs right there, underlayed with sound and see what happens than..

[geocapital]

I'm not familiar with the problem. I usually cut a movie to compress more the end-titles, then I join them again and later put the sound.

But, I don't know if cutting the avs will be working.
If it doesn't, try to cut the vobs.

[((( atom )))]

i cut the avs and figured, that the speech in every scene in the small range i had to rech 700 mb was always half a word or so advanced..

just posted, because i had similar problems very often. well, i'll keep an eye on it..

thx anyway

/jc

[jggimi]

If the problem is "all keyframes are in the middle of sounds" -- (which you can blame on the content, rather than the tools) you have several choices. Well, if this were my issue, I'd consider picking from one of these three options: As described above, split the vobs at a chapter and encode separately.
Overlap splits -- 1st half ends at keyframe N, 2nd half starts at keyframe N-1
Use DivX3, you can manually shift keyframes around in Gknot.

[manono]

Hi-

Or cut at a true scene change instead of just a keyframe. I make my 2 CD movies 1380 MB so I have a couple of minutes leeway to find a good place to cut where there's no overlapping music or talking. And this assumes your audio's not out of synch. But no problems here. There was a problem with XviD a while back where you couldn't scroll to the place you wanted to cut, so if you have an older build of XviD installed, that could be the problem. But I don't think so from the sound of it. Actually, based on your first post, that was the problem with XviD before. VDub would show one frame, but cut somewhere else, no matter which codec you had actually encoded with.

You could cut the second CD at the keyframe previous to the one for the first CD cut as jggimi suggested. That way you'll be assured of getting the complete sentence at the beginning of the second CD.

[geocapital]

Try to re-drive keyframes, while opening the avi.
Maybe, you'll find a different keyframe, not in the middle of the speech.

[jggimi]

I've thought of a 4th option. The default is 300 frames between keyframes without scene change. Setting that to 150 or 100 would double or triple the number of keyframes, respectively. It would affect compressability, of course, but it is another option.

[((( atom )))]

well, i kinda gave up on this movie, since it had to be finished at some point.it was undersized a fair bit (about 40mb or so) and still i could't find a good scene to cut. in the given range was a very noisy singing/dancing scene. it had a perfect moment of silence to cut it at, but you wouldn't believe in what short time these 40 mb were used up. took like 2 minutes, so i didn't even get there! i could reencode the whole thing, giving it some more space, but i don't know, when i'll find the time.. well, good thing is, as long as i don't find time, i won't need the hd-space for another movie, so there still is a chance. on second thought.. -when i reencode it, i will cut it using dvd2avi in the first place, since i know the exact position now..