When you watch video played with the wrong field order, you're seeing the fields played in completely the wrong order. So the fields will actually play back in this order: 2, 1, 4, 3, 6, 5, 8, 7, etc.
If you can see past that nightmare to the aliasing issues, then you're a better man than I.On 8 November 2015 at 03:24, bigfish@pacbell.net [Avid-L2] <Avid-L2@yahoogroups.com> wrote:
You are describing the temporal aspect. Isn't there also a spatial aspect in play? If I put the video that should be in F2 into F1 and vice versa that will created Jaggies on a diagonal line won't it. Just like in scratch removal on interlace material it's better to use a 2 field relative offset than one because that will have a 1 line vertical shift. I completely agree there is the temporal judder you describe but it sure seems there is going to a stair stepping introduced in a diagonal line. Am I thinking about this wrong.
If only I had some example footage. Wait according to this thread I just need to watch some broadcast television and I'm sure to run into some soon.
---In Avid-L2@yahoogroups.com, <DennyD1@...> wrote :It looks like a 'juddering' artifact with motion in the picture. For example, if there was something moving across the screen left to right, the wrong field order would be seen as the motion 'jumps backwards' on field 1, then forward again on field 2. It's a kind of stutter that just looks bad.
Dennis Degan, Video Editor-Consultant-Knowledge BankNBC Today ShowSent from my iPhone 6 PlusOn Nov 7, 2015, at 10:11 AM, Frank Felker FJFelker@... [Avid-L2] <Avid-L2@yahoogroups.com> wrote:This thread has me wondering...what does reversed field order look like? I see jaggie lines all the time on-air..is that actually reversed filed order? It's usually on a 4x3 spot on a HD channel.
frank
On 11/6/2015 11:30 PM, Dennis Degan DennyD1@... [Avid-L2] wrote:I write:I have the matte to fix wrong field order for 1920x1080 video as a TIFF. Here's how you use it:Put same vid on two tracks. Offset the lower track by one frame EARLIER. Import the TIFF to make an Avid video clip. Apply the imported TIFF to track 3. Add Matte Key Effect to track 3 (the imported TIFF). If the clip still strobes, invert the Matte Key in the Effects Editor. Render if necessary. Enjoy the results.
Dennis Degan, Video Editor-Consultant-Knowledge Bank
NBC Today Show, New YorkOn Nov 6, 2015, at 8:57 PM, bigfish@... wrote:
I remember someone had a very interesting approach to fixing field order involving hicon mattes for each of the fields scan lines that was applied as a matte key on a dup of the shot on an upper track and shifted a frame which, with the hold out matte applied keyed back in the proper field of video. IIRC that Bouke but I may be wrong. What are other methods of correcting this. I've dealt with deinterlace with BCC but that's not what reverse field order is.
---In avid-l2@yahoogroups.com, <DennyD1@...> wrote :
On Nov 5, 2015, at 10:58 PM, Mark Spano wrote:> And don't get me started about reversed field order - that's even worse, and just as prevalent. I honestly wonder what some editors are looking at when I see that stuff on air.I offer:I have the answer for that. There are two reasons why this occurs: (1) Editors are not seeing the error while editing because they are cutting on so-called 'desktop' editors; Avids installed without broadcast-output hardware (Nitris DX, etc.). The reversed field order error cannot be seen on a computer monitor in the Avid interface. (2) Editors don't know what to do to fix it even if they could see it. In addition, Avid doesn't make it easy to fix. There are a number of ways to fix the error. All of them take time and results vary or have limitations. So the error ends up on the air. I see it all the time at my place and it drives me up the wall. Sometimes, you just have to let it go . . . let it go . . . . . :(Dennis Degan, Video Editor-Consultant-Knowledge Bank
NBC Today Show, New York
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