Confusing Field order terms by differenet softwares.Plz help

[hhamzeh]

Hello,
there are many confusing field order terms by different softwares and video websites. For example, Canopus ProCoder use Lower/odd field first OR Upper/even field first. However, some video websites i.e. (www.lukesvideo.com), use odd/Top field AND even/bottom field which is opposite of what Canopus defines. Ulead introduced something else as Field order A and Field order B. So Could somebody who is 100% sure of field order terms Clarify that what is the "CORRECT" field order terms and especially what Field order A and B by Ulead mean? (i.e. Lower field first = Odd field first = field order A)

[adam]

Fields are created by taking every other row of horizontal pictures. So top/upper, odd, and A all refer to the fields consisting of rows 1, 3, 5, etc...

Bottom/lower, even, and B all refer to the fields consisting of rows 2, 4, 6, etc...

[Mythos2002]

Is there anyway to tell what field order my GeForce4 uses for interlaced video capturing and encoding. Thanks.

Mythos

[hhamzeh]

Thanks Adam,
I just do not understand why all softwares companies do not use the same terms as you mentioned. I just got an e-mail from Ulead support team indicating that the Field order A in Ulead video studio means Lower field first. But anyway that's the way they do business.

Mythos2002,
If you have a Ulead video studio, just open one of your captured files in video studio and then click on "info", if it says Field order A, it means Lower field AND of it says Field order B, it means Upper field.

[Mythos2002]

Thanks for the info. I tried it out in ULead Video Studio 6 but couldn't find any field info. When I loaded the video which was captured by Virtual Dub in 720x480, it told me that it was an AVI, and that it was captured in Huffyuv2.1.1 as well as the audio settings, but nothing on frames or fields.

Mythos

[adam]

If you'd like to check what your field order you can read my comment in this post.

https://www.videohelp.com/forum/viewtopic.php?p=462635&highlight=field+order+tmpgenc+dei...terlace#462635

This will of course only tell you what your field order is in TMPGenc, which is either A or B. I thought all programs used the terminology I listed above, it seems weird to think that field A in TMPGenc is equivalent to field B in Ulead, but who knows. The good thing about field order is, if you use the same methods everytime, then you only need to get it right once and then just use that field order for all future encodes.

[Mythos2002]

Thanks for the information. I found out field order A works best in TMPEng. If I try B, I get the jumpy picture you described when I preview it. I'm still having some trouble with minor strobbing during panning scenes. I hope I can find a way to correct that. Also, if my card happens to like field order B, how can I capture that way in Virtual Dub? Thanks.

Mythos

[BJ_M]

yes i posted on this several times - different companies name field order in different ways and sometimes in conflect .. depends in some people minds if you start counting at 1 or 0 for one reason ..

[DJRumpy]

Adam, I hadn't considered TMPGenc for this. I've been using an AVISynth script. Your way sounds much easier. I'll have to give it a try.

Field order A in Ulead video studio means Lower field first.

I can't believe they do this. I would read field A to be Top/0/First. In any case, hhamzeh, once you know the field order your card captures in, your all set. It is device dependant, meaning it will always be the same, as long as you capture using that device.

Just remember that if you crop your video, cropping an odd number of lines from the top, you will effectively change your field order.

[Mythos2002]

Thanks DJRumpy. You may have solved part of my problem. I cropped both the top and the bottom of the black bars. I'll have to load it up to see what I cropped them at.

Mythos