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Help with this clip - display and keying color settings

Posted: Tue, 10th Jun 2008, 2:47pm

Post 1 of 5

Elijah

Force: 1000 | Joined: 8th Jun 2008 | Posts: 42

CompositeLab Pro User PhotoKey 4 User

Gold Member

Hi everyone,

I have a small clip of DV footage that has not been touched by anything other than Virtual Dub, I used Direct Stream copy to cut out a section. So that means this is unprocessed footage directly from the tape shot on a Canon XL-2.

When I import this into Clab it appears very jagged on the edges. Clab identifies it properly and sets it to D1/DV NTSC (0.9) Interlaced (Even) and 4:1:1 for sampling.

Here is the link - http://dl.getdropbox.com/u/26576/cut.avi it is approximately 20 MB and is 6 seconds long

We just purchased the software even though I have not been able to get this working in the demo properly. It does render the output properly, but is very visually disrupting while working on it in Clab.

So since it renders properly we bought this software.

Can anyone give me any tips on optimal keying settings and how to improve th color of this clip?

Thanks so much!
Posted: Tue, 10th Jun 2008, 3:48pm

Post 2 of 5

Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

VisionLab User VideoWrap User PhotoKey 5 Pro User MuzzlePlug User PowerPlug User PhotoKey 3 Plug-in User FXhome Movie Maker FXpreset Maker Windows User

FXhome Team Member

I can see where the confusion arose from on chat now...that video clip isn't actually interlaced. It's a progressive video clip.

The reason you're having a problem, therefore, is that you're using a progressive video clip in an interlaced project. It's very important to know what kind of footage you're working with!

Aside from the total lack of interlaced combing lines on the video, another telltale sign that you've made a mistake is that if you import this into an interlaced project, every frame is duplicated. Every frame is repeated once. This is because the same frame has been split into fields, as the program is working on the assumption that it is interlaced footage.

If it WERE interlaced footage, each field would be different, and would show movement. If the 'fields' are identical, then something's wrong. smile

For more information on interlacing, check this website out:

http://100fps.com/
Posted: Tue, 10th Jun 2008, 8:28pm

Post 3 of 5

Elijah

Force: 1000 | Joined: 8th Jun 2008 | Posts: 42

CompositeLab Pro User PhotoKey 4 User

Gold Member

Thanks so much for helping me determine this. We used a XL-2 and it turns out it was shot in 30p. When it was imported it showed up in all my software as interlaced even field first.

It seems as if the flag had not been set and when imported there was no way to flip the flag to progressive. All DV NTSC I have worked with in the past has been cheap consumer camcorders. This XL-2 has this 30p feature.

The footage looks much better now however it does not appear as if Clab is displaying it at it's correct size. 720x 480 is showing as 720 x 530 and that is why I am having jagged edges.

How can I display this at the correct size?

Thanks
Posted: Wed, 11th Jun 2008, 8:13am

Post 4 of 5

Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

VisionLab User VideoWrap User PhotoKey 5 Pro User MuzzlePlug User PowerPlug User PhotoKey 3 Plug-in User FXhome Movie Maker FXpreset Maker Windows User

FXhome Team Member

You can set the project resolution in the project settings window when starting a new project. If you start a new project using the 'select movie' option, if should automatically detect the res.
Posted: Wed, 11th Jun 2008, 11:27am

Post 5 of 5

Elijah

Force: 1000 | Joined: 8th Jun 2008 | Posts: 42

CompositeLab Pro User PhotoKey 4 User

Gold Member

Tarn wrote:

You can set the project resolution in the project settings window when starting a new project. If you start a new project using the 'select movie' option, if should automatically detect the res.
I spoke with Hendo last night in the chat room and he said that 720 x 480 on tape is not the same as computer pixel size and that on a computer screen it is actually 720 x 534. The windows media player and vlc players both play it back in 640 x 480. Now, 720 x 540 and 640 x 480 would appear to have a aspect ratio of 4:3. I am not sure why it is 543 but it appears very close.

If you are wondering how I know this it is because I used a software screen pixel ruler.

I am going to set a new project today and import some tape to test it.