MPEG/DVD moving content problem

[Countryman]

(Sorry for the double posting, wasn't sure which Forum this lived in...)

Hi,

I am having problems with DVD quality in that any vertical item such as lampposts or ship’s masts ‘stutter’ as they go across the screen. It also happens if someone walks across the shot in the foreground. I thought it was due to the bit rate but I am using the fastest possible.

The source is a Sony PC110E DV camera importing via a Matrox RT2500 card. (The DV feed looks perfect.) This is then produced using Adobe Premiere 6.01 and converted to MPEG using the Premiere plug-in for Cinema Craft Encoder Basic (CCEB) version 2.70.01.02. This is set to:

Video setting – MPEG-2, 2-pass CBR, System Stream
Bitrates (kbps) – CBR 9,500, Quality setting = Natural picture, Complex
Audio setting – 384kbits/s, Joint stereo

The MPEG stream is placed on DVD with Ulead DVD Workshop v1.3.

The picture with slow moving or static content is fantastic with no artefacts. Can anybody help please? It is most frustrating!

[offline]

Next time just ask and leave it at the single post please. A mod will move it for you.

Mod Offline

[redwudz]

Sounds like interlacing artifacts. See here:https://www.videohelp.com/forum/viewtopic.php?p=1290675&highlight=interlace#1290675

That is normal when viewing interlaced video on a computer. Some programs like PowerDVD will show it correctly. If it does the same on a TV, then it's a problem.

[Countryman]

Thanks for the response Redwudz. The final DVD has been played through the TV and still shows the stuttering. This is only when converted to MPEG. The AVI file is perfect.

[Abond]

I don't know CCEB, but to encode correctly to mpeg2 you should set:
Interlaced encoding
Alternate scan order
bottom field first
Now the last setting in CCE is a bit weird as the encoder output is always top field first. The setting is something like Offset first scan line or something like that. It will result in correct top field first.
Hope this is correct 8)
BTW, I really don't see the need to encode 2-pass CBR , one pass should be enough. 2 pass is generally for VBR output.