I do NOT understand why an imported video file looks like hell (interlaced artifacts? at DVinfo.net

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Old October 30th, 2004, 05:57 AM   #1
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Location: Holland, Europe
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I do NOT understand why an imported video file looks like hell (interlaced artifacts?


IF I watch a dvd (movie or documentary, pal,24 film-like, whatever), they have beautifull scenes. Then when you import them in adobe/vegas for instance yoiu get these weird looking edges in the video. NOW I understand that is is due to the PC's MONITOR. It can only handle interlaced videos.

SO how can I be able to view progresive 24fps videos (frame work) on my pc without having to look at a screen with full of interlacing artifacts? How can I be able to view cdr/pal video on pc without this interlacing problems?

Do I need to buy a special tv? And what happens if you export a 25fps to video mpg or avi. Will the interlacing artifacts go away? I don't understand it. I guess you need to burn your exmported video file to cd or dvd and then watch it on tv. BUT THE TV ONLY PROVIDES INTERLACED VIDEO, so how the hell do the profesionals gte video on dvd, cassete or cdr?

Computer video screens are always progressive, and most NLE viewers don't interlace, so if you import interlaced footage you're going to see artifacts. But it has nothing to do with the way the footage is imported - you can't control the frame/normal setting anywhere except at the camera when you shoot. Once it's shot in that way, it's shot. You can convert with software but it's rarely very good. And you can never convert progressive to interlaced (you can, but it won't be 60 fps)
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Old October 30th, 2004, 06:06 AM   #2
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Sounds like this question is in the wrong forum...

PAL and NTSC video are interlaced video formats. They can also store progressive images, wether they've been shot progressive or turned progressive through software. Not all de-interlacing software is bad like your quoated article suggests, and it is totally possible to turn progressive footage into real proper interlaced, but it's very slow and requires specialist software.

If you bring in 24p footage, it may be embedded in a normal NTSC 29.97 frame rate, and hence have 3:2 pulldown in it which needs to be removed before you can see the individual 24 (actaully 23.98) frames per second, and they are progressive.

So all progressive video will look fine on your PC monitor. Both progressive and interlaced will look great on your TV.

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Old October 30th, 2004, 10:47 AM   #3
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So in order to see great images on PC, you need progresive recorder material. Thanks. I will look for a cam which let me do that. I don't want to tend up with interlaced artifacts. IF you edit on pc and you don't know what you are editing cause the end result on tv will be total different, then why not go for progresive scan camcorders.

Thanks fo ryour answwer. I apreciate it.I am so dumb lately.
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Old October 30th, 2004, 09:05 PM   #4
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You will find volumes of valuable information on this topic at www.avsforum.com. The Home Theater PC (HTPC) group would be a good place to start.
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Old November 1st, 2004, 05:31 AM   #5
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Hello Jose and greetings from Holland as well!

Whether or not you can work with interlacing depends mainly on
your output. What are you doing with your camera? Is it fictional
movie work or are you doing stuff for broadcast for example?

When shooting interlaced footage it will look "bad" on a PC
monitor because it is progressive. However if your final output
is TV I would stick with interlaced. You can always get a broadcast
monitor (or hook a [small] TV up to your computer) to check the
footage there so you don't see interlaced (too much).

On the other hand if you are doing fictional work progressive
scanning might be interesting. The most used camera's that
support it are:

- Canon XL1S (emulated progressive)
- Canon XL2 (true progressive)
- Panasonic DVX100 (true progressive)

There are some others, but these are the often used ones (unless
I'm really forgetting something at this point).

Which camera do you own now?

Rob Lohman, visuar@iname.com
DV Info Wrangler & RED Code Chef

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