Jerky DVD

[StewartTurner]

I had a DVD (authored using VS7) which went a bit funny, i.e. kept looping back to an earlier part of the film when it got to a certain point.

Using VS10+ I was able to extract the film as an MPG. Watching it on my laptop confirms that it seemed to capture ok. I dropped it onto the VS10+ timeline and allowed the project to inherit its settings, went through the Share/Create disc wizard to build a simple menu and burnt a new disc.

The film is all there and the sound is ok, but the problem is that the film is slightly "jerky" in that the movement seems to stutter every now and then. It looks more like the video that my digital still camera captures.

Does anyone know what might be the problem and how I can fix it?

Thanks,
Stewart.

[dazzler]

Hi,
I've had the same problem and believe it is caused by field inversion, meaning it was captured as upper field first rather than lower field first or vice versa. If so, jerkiness is most noticeable during panning or action scenes.

There is a free program called ReStream that can change the field order for you on an elementary MPEG2 clip but not on multiplexed MPEG which has video interleaved with audio.

The problem is that I haven't found a way to de-mux the MPEG2 into separate audio and video streams. Apparently its just a case of changing info in the header.

There also is a very good free program called DVDate which can tell you all about your clip properties.

It would be a useful feature if there was a button on the VideoStudio timeline that would allow one to change the field order of an AVI clip right there.

Because a monitor is not interllaced, you will never see this problem on a monitor, only on an interlaced TV.

Cheers,
Dazzler

[Ken Berry]

In the Share > Create Disc > DVD step, did you check in the cogwheel icon in the bottom left of screen whether the 'Do not convert compliant mpeg files' box was checked? If it was, then you should not have the wrong Field Order problem suggested by Dazzler. This is because your project properties, in the editing phase, had taken on the properties of your acquired mpeg-2 file from the DVD, including its Field Order. And with that check box ticked, then Video Studio would not change the properties in the final burn.

If the box was not checked, you would need to compare the Field Order in the Project Properties with the Field Order set by VS for burning (in the pane immediately above the check box.) And if there is a difference, you would need to change the latter properties to reflect the Field Order of the Project Properties.

[StewartTurner]

That sounded promisong for a minute but it can't be the problem. I always leave the "Do not convert..." box checked.

When importing from a DVD is it possible to import to AVI rather than mpeg? I wonder if this would work better.

Stewart

[Trevor Andrew]

Hi Stewart

Reading the postings it looks like a field order, but this would have been wrong on the first disc via VS 7.

As you had problems with the initial disc, the fault may be inherent in the mpeg and little you can do about it.

But to change the field order I would render after importing the dvd.

Importing the dvd copies the vob files to your hard drive as *.Mpg,
you cannot change to Avi. Which would be a waste of time anyway.

Import the Dvd
Let VS set the project properties.
What are they? Post them here¡¦
Edit the project properties, just change the field order.
Share Create Video File-Same as Project Settings.

Burn a dvd using the new mpeg.

This may cost you another disc.

Trevor

[heinz-oz]

If I understand you correctly, you had a problem with a DVD created with VS 7 and that had a problem, right?

You went and extracted the mpeg video from that disk into VS10+, right?

How did you get the original mpeg in the first place, before you created your DVD in VS 7? Captured to mpeg from a digital or an analog source? To what format, mpeg or DV-AVI?

[StewartTurner]

OK, I've done that. The settings are:
PAL (25 fps)
MPEG files
24 bits, 720x576, 25 fps
Lower Field First
(DVD-PAL), 4:3
Video Data rate: 6000 kbps
LPCM Audio, 48000Hz, Stereo

Are you suggesting that I chenge the settings to Upper Field First and re-render?

Thanks,
Stewart.

[Trevor Andrew]

Hi

If the properties shown are the capture properties, then they seem ok for analogue capture.
After editing you create a new video file to the same properties.
Using this to burn your dvd.
That¡¦s how it should work.

So how did you capture the footage¡Xanalogue or digital?

And that¡¦s going back to the beginning.

I had a DVD (authored using VS7) which went a bit funny

You can try changing the frame order and re-rendering, but !!!

Trying to correct the funny file may not be possible.

Trevor

[GeorgeW]

Using VS10+ I was able to extract the film as an MPG. Watching it on my laptop confirms that it seemed to capture ok. I dropped it onto the VS10+ timeline and allowed the project to inherit its settings, went through the Share/Create disc wizard to build a simple menu and burnt a new disc.

If you went into the Disc Creation Module with the VS10 Timeline, then I believe everything will be re-encoded (regardless if you have the DO NOT CONVERT option checked).

When you created your DVD, did it take a while to re-encode -- or did it go by very quickly?

btw, if you used the Import from DVD function, then find out where the mpeg file got stored. Then open a new VS10 project, and with an empty timeline, go straight to the Create Disc module. Add the mpeg that got stored on your hard drive, make sure you have the Do Not Convert option, and burn your DVD to folders. Did it go by quickly (except for building menu transitions and such)?

Side note -- it did not appear you were doing any editing to the video. So you can just go into the Create Disc module from the start, and Import from DVD there -- then add menus and output a dvd.

Regards,
George

[StewartTurner]

Trevor, the original video was captured from a DV camera, so it has always been digital.

George, I'm not sure how long it took because I usually leave it overnight. I usually use the fancy new facilities on the menus so it takes a while for them to render first. I'll do a test later on with the technique you mentioned in your side note and simple text menus with no transitions.

Thanks,
Stewart

[Trevor Andrew]

Hi Stewart

After reading your replies I feel that you are rendering in the burner module.
I would not recommend this approach. Any rendering should be carried out prior to Share-Create Disc.

Can you confirm that you are:-

Starting a new project (an empty timeline.)
Make sure the project properties are the same as the video file.(Mpeg2)

Share-Create Disc¡XADD video (here you add the mpeg 2 file.
Create your menus

-------------------------------------------------
Create a Dvd Folder as a test
When you hit ¡¥Burn Disc¡¦ You may be presented with a window saying ¡¥This action will take some time to render¡¦ (always in VS10)
Saying OK will start the process. If the process bar shows ¡¥converting titles¡¦ then your settings are wrong. Rendering of the mpeg is taking place.
You have a compatible mpeg and should not change it again.

The process bar should show ¡¥Convert Menu¡¦
This may take some time depending on the menu you used.
Use a thumbnail menu for speed, and disable motion menu. And that¡¦s as fast as it possibly gets.
---------------------------------------------------------
If you burn without menus the process starts with Video/Audio Multiplexing, Then finalizing VOB, this is the final stages to burning a dvd.
Just ran this through my system and completed a 22 minute video in 3 minutes

Check the procedure by Creating a DVD folder to your hard drive.

Trevor

[heinz-oz]

Since, as far as I can gather, we are looking at an mpeg file, created with VS 7, authored to DVD and then displaying a problem when playing the DVD, I would say we have a corrupted mpeg2 file on our hands.

Importing that again from the DVD as mpeg2, does not make that file uncorrupt itself.

[GeorgeW]

Since, as far as I can gather, we are looking at an mpeg file, created with VS 7, authored to DVD and then displaying a problem when playing the DVD, I would say we have a corrupted mpeg2 file on our hands.

Importing that again from the DVD as mpeg2, does not make that file uncorrupt itself.

Heinz, if you read the original post, it appears the DVD went "funny" by looping at a certain point. After importing the mpeg2, he confirmed that the video was in tact and had captured properly (at least that is how I read it). He then went straight to the burning module, added some menus, and noticed the resulting dvd was "jerky" (which could be due to re-rendering -- which is what would happen when using the VS10 Timeline as input to the disc creation module).

If the intent is just to re-author the original mpeg2 (so it no longer loops at a certain point), then simply importing from dvd and re-authoring should work. If there is a need to fix a section of the original mpeg2, then that would be a different story. But I did not read that any sections of the mpeg2 were being fixed in the editor module -- did you

Regards,
George

[StewartTurner]

Hi,

Just to clarify, I do believe that the mpeg file is intact. I've followed Trevor's advice and created a very simple menu, adding the video in the create disc step. The "burn" process went very quickly to "video/audio multiplexing" and is now "Finalising VOB" after about 10 minutes for a 1h04m video.

I must conclude that the resulting video on the disc will be identical to the video on the original disc so fingers crossed for later on when I burn and try the disc.

Stewart

[StewartTurner]

Just to let people know - the disc is now fine.

Thanks for all the help!

Stewart