DVD video jumpy

[myriaxis]

Hello there,

If I'm not posting in the right forum, please let me know.

I've been working on a DVD project where I convert .AVI files to DVD format. I've encountered a problem where the video gets jumpy. It's a bit hard to explain, but it seems that when I play the DVD in a standalone DVD player, the video freezes for a few milliseconds and then jumps to the next frame. It's more evident during scene change. I get the same results when playing the DVD copy on the hard drive. However, when I play the pulldown .MPV file used to create the DVD, I don't get this jumpy behavior.

Has anybody seen this problem?

The DVD project is NTSC 720x480 29.97.
I use DVD-Lab 1.3 to author the DVD.
I use CCE 2.5 to encode the MPEG2 stream.
I pulldown the MPEG2 stream to comply with NTSC.
I use besweet to encode an AC3 stream.

[neil wilkes]

What were your MPEG settings - in particular, bitrate, GOP structure & Frame types (I, P & B frames, amount etc)

It sounds like the bitrate is too high for the player, and it cannot read off the disc fast enough.

[myriaxis]

The CCE 2.5 settings are:

MPEG-2
CBR 4250
Add sequence end code
Progressive frames
Linear quantizer scale
Zigzag scanning order
DVD compliant
Luminance level: 16 to 235
Intra DC precision: auto
Aspect ratio: DAR 4:3
Timecode 00:00:00:00
GOP sequence: IBBPBBPBBPBB M=3 N/M=4
GOP header: every 1 x N frames
SEQ header: every 1 GOP
Image quality priority: 5

[BruceL]

@myriaxis
I am experiencing the same type problem. My AVI video caps look fine with the MPV file generated with CCE (I use CCE Basic) but when I author them with DVD-Lab 1.3 they have that jerky stuttering motion. Have you been able to find a reason or seen how to resolve? I have been searching forums and so far nothing. Any help would be greatly appreciated.

[myriaxis]

Hi BruceL,

I found a thread on videohelp.com that suggested to use the alternative multiplexer engine when compiling the DVD with DVD-Lab 1.3. I tried it twice and it appears to work.

I also found, on the DVD-Lab web site, references to this problem. Instead of "jumpy" video, the problem is called "stuttering" video. To solve the problem, it is suggested to play with the GOP structure before attempting to use the alternative multiplexer engine. With my AVIs, adjusting the GOP structure didn't solve the problem.

I've also been told that using multipass may solve the issue, but I haven't tried this yet.

Hope this helps.

[BruceL]

@myriaxis
I tried the Alternate last night once real quick and it did seem to fix it. I'll have to pick up some -RW disks to experiment with my stand alone DVD players to make sure they will work also. I have not tried changing GOP settings yet. My CCE Basic encodes are all two pass (Basic can only do two pass max)and they all stutter with the standard multiplexer. Hopefully the new version will come out of beta soon and resolve some of the problems. Thanks for your help.

[qwerty83]

Im having the same problem but is using Scenarist. Anyone knows how to solve this in Scenarist?

[BruceL]

@qwerty83
I do not have Scenarist so I am probably no help. The problem in DVD-Lab is with the standard multiplexer called "Main". They do provide a second one called "Alternative" which works better for some folks including me. Does Scenarist have more than one multiplexer engine? If so have you tried it? Do the makers of Scenarist have a web forum for sharing ideas and problem solving?

[qwerty83]

Brucel

It seems that Scenarist only have one multiplexer. Scenarist doesnt seem to have many options at all.

The makers of Scenarist doesnt give much support at all and I havent found anybody having the same problem in Scenarist in this forum.

Actually I posted this question in another forum last week but still none have replyed.. :(

[BruceL]

@qwerty83
Does your MPEG2 file play smooth before multiplexing with Scenerist? DVD-Lab and TMPGEnc Author have evaluation periods. You could try either of these and see if the problem goes away.

[qwerty83]

BruceL
It played smooth in TMPGEnc Author. Therefore I know its Scenarist who screws it up. But Scenarist got some functions I would like to use :(

[myriaxis]

@qwerty83 and BruceL

I don't know if this may help you, but at the beginning of my DVD creation experiment, I used DVD2SVCD. It was relatively quick and easy, but the process had to go through a multiplexing phase with BBMPEG. I started to notice the "jumpyness" or "stutteringness" of my AVI conversions at that point. BBMPEG was not able to multiplex the converted video.

I don't think this problem is a bug in DVD authoring programs, but a rather difficult combination of video scene changes that can only be treated by professional software. So far it seems that only DVD-Lab 1.3, using the relaxed multiplexer, is able to cope with this situation.

[qwerty83]

myriaxis
so if i understood you right, it could work if i dont use any scenechanges (no chapters)?
I can live with that if thats the problem..

[myriaxis]

qwerty83

I'm definitely not an expert on the matter. I can only speculate from my own findings. The scene changes I'm referring to are those encountered in the video stream during encoding. As you probably know, the thoughest job for the encoder is to adjust to rapid changes in the video frame composition. When the action goes from one scene to the other (scene change), the video composition may change radically. When that happens, we have a difficult combination of video scene change.

Now, I don't know why the "jumpyness" shows up only when multiplexing the encoded video stream on the DVD format. The only alternative I can suggest is to use DVD-Lab 1.3. If your encoded video is "jumpy" playing back the final DVD result, then give a try to DVD-Lab 1.3 with the relaxed multiplexer. This might just fix your problem.

[Zap_Bee]

i'm experiencing the same problem for a while. i changed every "part of the chain" except DVDLab, i.e. Encoder, DVD-Burner, DVD-Media, DVD-Player.
Changing the Encoder helped nothing at all. Changing the Media resulted in less "jumps-per-minute" (with TDK DVD+R), on different DVD-Players i've seen more or less jumps, but always on the same frames.
I used to author my DVDs with TMPG DVD Author, without any of these problems. But as there are only menu templates, this is not an option for good-looking DVDs.
I've noticed, that if you play the video from start to finish without skipping chapters or rewinding, there are less jumps than if you use FFWD/ REW and chapter skip frequently. So it may be a combination of multiplexing engine, Media and Player (Error Correction), which results in more ore less "jumpyness".

Zap

[Dreamhacker]

I have the same problem I think, and then the reason is fps...
23,97 fps files have to be encoded as NTSC with 23,97 "(internally 29,97 fps)" mode, I think. If the files are 25 fps or 29,97 fps it's just to burn them in normal modes (25 fps = PAL, 29,97 = NTSC)