Strobing / Flickering problems on Finilized DVD

laswayze · Post by **laswayze** » Mon Oct 17, 2005 2:16 am

Help! We are experincing problems with the video 'strobing' on the final
DVD file (.vob). If I play the MPG file that was created from MSP8.0 trial, it appears to be ok! I can only guess that this trouble shows up during the DVD authorizing.

Any ideas or has anyone else ran into this?

Looking for help A.S.A.P. as I am working aginst a deadline.

sjj1805 · Post by **sjj1805** » Mon Oct 17, 2005 2:21 am

Is it a Field Order Issue when you created your video file that you now wish to convert into a DVD.

Generaly speaking anything captured from a camcorder via a firewire will be lower field first. Anything from a TV card will be upper field first.

Get it the wrong way round and you get the strobbing effect you mentioned. I have successfuly reversed a video that had the field order the wrong way round by just putting it back into the editor (VS9 / MSP8) and rendering it again the correct way round.

laswayze · Post by **laswayze** » Mon Oct 17, 2005 2:37 am

Thank you for the suggestion. I (we) will test for this problem. If there is anyone else out there that might have an idea, please contact us.

skier-hughes · Post by **skier-hughes** » Mon Oct 17, 2005 10:23 am

Depends on your definition of strobing, but I think you'll find sjj1805 is right.

laswayze · Post by **laswayze** » Mon Oct 17, 2005 1:31 pm

I would like to thank everyone for their wonder ful help!!

The suggestions that were provided to us HAS been successful in taking care of our problem!!

Thank you to all!!

azsimons · Post by **azsimons** » Tue Oct 18, 2005 5:57 pm

I am having a similar problem. Finalized DVD w/ VS9. Everything appears fine and when I play it on any of my DVD players the video is studdering and pixilated. (audio works fine). When I play the finalized DVD on my computer through WinDVD player the quality is great.

All of the original analog video was captured through ULead w/ a Dazzle 90 capture device plugged into my USB (no firewire).

I saw a "Field Order Issue" was a past problem in this post. Would that apply here as well? If that would apply, what exactly does that mean? I had trouble understanding that and the best way to correct the problem.

Thanks.

sjj1805 · Post by **sjj1805** » Tue Oct 18, 2005 6:27 pm

Yes it does very much sound like a field order problem.
Computer monitors and television sets work differently.
If you are only going to watch something on a computer monitor then you can use frame based.

The two field based choices, upper field first and lower field first are for television viewing. The one you choose depends upon the source of your video.
Generally speaking anything from your camcorder - normally connected to the computer with a IEEE1394 (Firewire) cable will result in lower field first.
Anything captured from a TV card will be upper field first. There are several in depth explanations elsewhere in this forum about field order.

Very briefly, a television works by only displaying/refreshing half a picture at a time - ie. every other line (625 in the UK PAL system) but at 25 frames per second your eyes will not notice.

In simple laymans terms imagine a sequence of frames have been prepared with either upper or lower field first A B C D E F.
If you have the field order the wrong way round the playback would seem a bit like A C B D F E and thus you get this jerky or strobing effect which is most noticeable with objects that are moving, particular tall upright items such as lamp posts and telegraph poles and people!

Remember this is just a simple laymans term explanation, there are plenty of in depth posts in this web board on the subject.

azsimons · Post by **azsimons** » Tue Oct 18, 2005 8:33 pm

Thanks for the help, I appreciate you taking the time. Sounds like that is my problem.

How do I fix it? I can rerender my mpeg2 files to change the field order. You mentioned in an earlier post you have had success with this.

How do I do I do this? I loaded up a file to rerender, but could not find any settings regarding field order. Where and how do I change this setting?

Thanks again for the help.

sjj1805 · Post by **sjj1805** » Tue Oct 18, 2005 10:36 pm

You have to change the Field order with your video editor, not DVD Workshop.

If you're using Video Studio 9, place it on the timeline then go to share.
Create video file select the format Eg PAL DVD and in the save box you will see the current field settings. If the field settings are wrong then "cancel"
Create video file, Custom, Save as File type, as you are now ready to go to the DVD stage select MPEG.
Options, General, And you a a box to select Field Order.

Media Studio 8 is a bit easier
File, Create Video File, Save as Type (Select MPEG) then Options, Again on the "General" tab is an option to choose the field order.

azsimons · Post by **azsimons** » Wed Oct 19, 2005 5:50 pm

Thanks again for the help and time you are taking. I am still having troubles though.

I am using VS 9

I am in the US, so I should be using NTSC DVD instead of Eg PAL DVD, correct?

All of the video I captured was from a analog camcorder and transfered through my USB 2.0 port. So that means I should I should rerender it all into "Upper Field", correct?

Is it best to rerender all my edited movie files(which are currently in mpeg2 format) into all new mpeg2 that are saving in "upper field"?

Also, when I am in "share" and creating files (to eventually be burned to DVD), I go to custom, video save options,compression - what should the media type there be? Should it be mpeg2 or NTSC DVD? Should I use the anti-flicker option, will that help?

Also, on the general tab, frame type setting - that is where I apply the "upper field" setting, correct?

Than once all my current mpeg2 files are all converted to "upper field" then do I create a DVD?

Thanks again for the help.

sjj1805 · Post by **sjj1805** » Wed Oct 19, 2005 7:59 pm

Correct on all counts.
The anti flicker filter as far as I can tell is for when you insert still images - such as a slide show. I do not think it has any effect on video footage.

NTSC DVD should produce MPEG files in the NTSC format.

azsimons · Post by **azsimons** » Wed Oct 19, 2005 8:04 pm

azsimons wrote:
I go to custom, video save options,compression - what should the media type there be? Should it be mpeg2 or NTSC DVD?

Thanks again for the help

sjj1805 · Post by **sjj1805** » Wed Oct 19, 2005 8:09 pm

Sorry but we crossed each other in our postings, I realised I missed it off and edited my reply.

Choose NTSC DVD and this will produce an MPEG file.

Regards

Steve J

Devil · Post by **Devil** » Thu Oct 20, 2005 6:15 am

azsimons wrote: All of the video I captured was from a analog camcorder and transfered through my USB 2.0 port. So that means I should I should rerender it all into "Upper Field", correct?

Not necessarily. What are you using to convert from analogue to digital? What format is the datastream coming from the converter? How have you set up the capture project settings?

azsimons · Post by **azsimons** » Thu Oct 20, 2005 3:37 pm

I tried it again last night and I was still having the same problem.

I used a Dazzle DCV90 to transfer the video, Not sure of the data stream. Here is the website of the product I used. (I used the hardware but used Ulead VS9 as the software to capture).

http://www.pinnaclesys.com/publicsite/u ... tor+90.htm

The original capture data of the videos is here:

That did not work.

I created a new capture last night (not rerendered) but all new capture and it still did not work correctly. The data for that file is here:

If other data is need to assess problem please let me know.

Please let me know if you have any suggestions on getting this to work correctly. Thanks again for all the help. It is much appreciated.

Josh

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