Stutter

MichaelS wrote on 12/20/2003, 7:19 AM
Occassionally, in my final DVD product, I will have a clip that exhibits a very minor "stutter". Overall, the clip is viewable, but is especially annoying during high motion sequences. It almost looks like film in that the clip loses its feeling of depth. I hope this makes sense.

The video is captured using Scenalyzer all at the same time. Other clips look great. This makes me think that I'm doing something in the edit process that may be affecting the clip. Just can't put my finger on it. Often when I recapture the clip and replace it in the timeline, the problem goes away.

Anyone have any insight as to what could be going on.

Comments

Jsnkc wrote on 12/20/2003, 8:15 AM
Too high of a bitrate maybe??
MichaelS wrote on 12/20/2003, 8:48 AM
That was my first thought.

I render using the Vegas pre-sets for MPEG-2 DV, rendering both audio and video together using MainConcept MPEG-2 at the Vegas default setting. All video is captured as one clip. Cuts are selected in the trimmer. DVD's are created in DVDA using standard single movie settings.

Just have one rather long (20min) section that looks this way. Total project length is around 50 min.
JJKizak wrote on 12/20/2003, 9:34 AM
Someimes (maybe more) if use use CBR instead of VBR the stutter
will become very intense. Sometimes if you capture from a tape that was copied from another media the stutter will be there. Try taking the raw AVI from the hard drive (after capture) and put it into DVD-A and see how it comes out. I always try to capture direct from the original source and it seems to help. Don't know why.

JJK
craftech wrote on 12/21/2003, 11:58 AM
TTttttry....BBbbbburning........at 1x.

John
MichaelS wrote on 12/21/2003, 8:25 PM
Will try that tomorrow...sounds reasonable.
farss wrote on 12/21/2003, 10:47 PM
Now here's the odd thing. had many dramas making these not very exciting DVDs. After I sorted out the PAL menu thing with the latest patch I found in the odd place the DVD would do just that. So I tried burning at 1x, no better, so I thought damn it might as well burn at 4x then seeing as how it was now 1 am. Blow me down that fixed it!

So don't always believe the slower is better theory. Media designed to burn a 4x may well perform better at 4x. In fact one comment I read on the label was it took a lot of work to get the 4x media to also be able to burn at 1x.

Of course we finally fixed the problem. The retailer replaced all the units with the latest 'model' and then everything worked just fine even without the DVDA patch.

I have a test DVD, the entire thing is encoded at max bitrate and max PCM and ac3 rates. Most PCs and Macs will show horrid artifacts, I'm told many very expensive players cannot cope with the high bitrate audio either. Encoding was I believe done with CineCraft hardware encoder and it looks stunning. Some material is downconverted from Sony HDCAM, rest from Betacam.

Now here's a question. How can the manufacturer put the DVD Video logo on the box when it clearly doesn't meet the spec?