jerky motion in burned dvd

rififi · Post by **rififi** » Mon Apr 14, 2008 10:33 pm

A film I've transferred through Movie Factory 4.0 looks fine in U Lead but the burned DVD looks pixilated and the motion is jerky

The file is 80 minutes, 1.4 GB

I'm burning it onto a standard 4.7 GB disk in an external DVD burner

These are the Project Settings:
MPEG files
24 Bits, 720 x 480, 29.97 fps
(DVD-NTSC), 4:3
Video data rate: Variable (Max. 7000 kbps)
Audio data rate: 256 kbps
Dolby Digital Audio, 48 KHz, 2/0(L,R)

Do not convert MPEG files and Treat MPEG audio as non-DVD compliant are checked

The output is NTSC.

DVDDoug · Post by **DVDDoug** » Mon Apr 14, 2008 11:16 pm

Your project settings look fine...

The file is 80 minutes, 1.4 GB

What is the format (and properties) of the original file? (This is probably not DVD-compliant MPEG-2.) Where did this file come from? (If it's possible for you to re-capture to a less-compressed format, that will probably help.)

Format conversion is generally "difficult". You might want to try converting your file to MPEG-2 with SUPER (FREE!!!). Use the same (or similar) settings as you used for your Project Settings.

You will always get some quality loss when converting from one lossy format to another lossy format. The amount of (additional) quality loss depends on many factors. Conversion can be especially difficult if you need to change the framerate and/or the resolution.

rififi · Post by **rififi** » Tue Apr 15, 2008 1:13 am

The file was created from a 16mm film transferred into a computer with a Belkin USB adapter. I didn't intentionally change the frame rate but that does look like it's the problem.

DVDDoug · Post by **DVDDoug** » Tue Apr 15, 2008 6:53 pm

Film makes it very tricky... Somebody else will have to help you with this. I've never done any film transfers or framerate conversions.

The film framerate will NOT match the 29.97 frames-per-second required for NTSC. I think 16mm is 24 frames-per-second (same as professional 32mm or 64mm).

The pros do the framerate conversion with "2:3 pulldown" as part of the telecine process

You still didn't tell us the properties of your 1.4GB captured file. It's much more compressed than your project settings. ...You can't get "DVD quality" from an 80-minute 1.4GB file. You will get better results if you set-up the Belkin software to capture in a format similar to your (DVD-compatible) project settings.

rififi · Post by **rififi** » Wed Apr 16, 2008 6:46 am

The film framerate will NOT match the 29.97 frames-per-second required for NTSC. I think 16mm is 24 frames-per-second (same as professional 32mm or 64mm).

The pros do the framerate conversion with "2:3 pulldown" as part of the telecine process

Are the framerate and the 2:3 pulldown things I can set IN U Lead? I read the Wikipedia entry and it seems film and PAL have similar frame rates. I tried setting source to PAL in U Lead but that wasn't it. The picture in U Lead after I capture looks good. The problem only appears in the burned product.

You still didn't tell us the properties of your 1.4GB captured file.

I don't know what you mean by this.

set-up the Belkin software to capture in a format similar to your (DVD-compatible) project settings.

There is no software. It's just a non-powered plug with video and audio outputs.

Thanks for your help.

Black Lab · Post by **Black Lab** » Wed Apr 16, 2008 1:49 pm

After you capture the clips with your Belkin adapter, right click on one of the clips in the library. That will give you the clip's properties.

Besides the frame rate, make sure the field order is the same throughout. Since you captured analog video the field order is probably Upper Field First. Make sure your project properties and burn properties are also Upper Field First.

rififi · Post by **rififi** » Thu Apr 17, 2008 4:16 am

The only information I found in Properties was size 54KB. How do I make a larger or less compressed file in U Lead?

Post by **Ken Berry** » Thu Apr 17, 2008 11:19 pm

You will get all properties if you right click on one of the files *within* Movie Factory e.g. with the file in the timeline... If you just use Windows' My Computer or Windows Explorer on the file, it will not give any more information than you apparently saw...

rififi · Post by **rififi** » Fri Apr 18, 2008 7:44 am

I see!

File Format: MPEG 2
File size: 1,236,739 KB
Duration: 4944.344 seconds

Video type MPEG-2, Upper field first
Total frames: 148,182
Attributes: 24 bits, 320x240, 4:3
Frame rate: 29,970 Frames/sec
Data rate 1800 KBS

Audio type: MPEG Audio Layer 2 files
Total samples: 210,045,486 samples
Attributes: 44100 Hz, 16 bit stereo
Layer: 2
Bit rate: 224 kbps

rififi · Post by **rififi** » Tue Apr 29, 2008 1:34 am

I tried burning at a slower speed as recommended by Corel to avoid jerky motion. The motion is better but not perfect and the picture quality suffers.

Why am I creating inadequate sized files for DVD quality? Is it the method of capture (a Belkin USB adapter). If so, the captures look perfect in ULead while I'm adding menus, mutitrimming, etc. but not good once burned.

Thanks.

sjj1805 · Post by **sjj1805** » Tue Apr 29, 2008 1:42 am

The jerky motion may be as a result of the fact that the film frame rate is 24fps and you are converting it to NTSC at 29.98 fps so it has to invent some extra frames probably by duplicating them.

The other normal cause of jerkiness is incorrect field order. Your input properties posted above show Upper Field First, double check that the output is also Upper Field First. You cannot rely on the "Do not convert compliant MPEG files" because the chances are yours are not compliant and being converted to the project settings. In your initial post you missed out what field order was set.