Interlacing on ie1394 firewire Camcorder

Don Bloomfield_ · Post by **Don Bloomfield_** » Tue Sep 02, 2003 06:41

Has anyone else experienced bad interlacing problems using a live feed from a dvcam? I'm using a P4 1.8GHz lappy with radeon 7500 mobile card, and a JVC Camera (giving input happily with no film in) Looks good, except for the picture becomes a weird interlacing nightmare. Looks like it takes field 1 for the first 10 or so lines in 320x240 then field 2 for 10 or so, then field 1 again, and it looks like a weird horrible interlacing effect

Not what I want for smooth video on a projector.

Can someone give some advice please?

Post by **bart** » Tue Sep 02, 2003 14:02

you might have some luck with Pete Wardens deinterlace freeframe plugin ...

Yuri Elik_ · Post by **Yuri Elik_** » Tue Sep 02, 2003 16:22

Yes I did experienced this effect as well, and no, deinterlace plugin is no help (obviously it must be fighting normal interlacing that is one line from field1, another from field2, not several lines as happens here).

I guess this problem goes from improper scaling?

Don Bloomfield_ · Post by **Don Bloomfield_** » Wed Sep 03, 2003 01:08

Yep. I think its worse because i'm using pal (576h) down to 240h. no scaling is going to work well however. Would it be possible, I wonder, to crop the image, and maybe get a 480 high band to work properly? hmm.

Thanks

ether_warpTV_ · Post by **ether_warpTV_** » Wed Sep 03, 2003 22:35

does your camera have a progressive scan mode?
i have an old panasonic DV which has an option to film as "frames", so no interlacing.
The frame rate drops to about 16fps but at least it doesn't get scanlines through it.

Yuri Elik_ · Post by **Yuri Elik_** » Thu Sep 04, 2003 14:59

To Don: scaling from PAL to 240h will work quite well if you scale down single field, not frame

It seems Resolume (or some system drivers?) unite two fields into frame first, and only afterwards scales them down.

Don Bloomfield_ · Post by **Don Bloomfield_** » Sat Sep 06, 2003 04:23

Thanks to all

I've found running at 640x480 on my laptop suits my purposes fine (4 video feeds, 2 live at any one time) with a flash overlay. I'm doing live mixing for a fashion parade to have a projected image behind the catwalk. (a fairly private affair for an old school buddie, approx. 250 seats)

All advice is much appreciated, and i'm still loving this program.

Don
Have a great day

lotech_ · Post by **lotech_** » Sun Sep 07, 2003 07:28

We also have the same problems with 1394 input in resolume. Shite interlacing coming through on all DV cam based inputs. This is the case on all our PCs (2 desktops and a laptop) and across both our DV cams (a Sony TRV11E & Panasonic DS38).
The Panasonic supports Progressive but it makes no difference on or off - thinking about it though progressive may only be applicable to analogue outs on the camera, as I believe DV standard is interlaced by default and cannot be changed. I've noticed most people with this problem all seem to PAL? Does anyone with an NTSC setup have this problem?

lotech_ · Post by **lotech_** » Mon Sep 08, 2003 12:14

I've started a thread @ vjcentral to see if anyone else has any ideas. Check it here: http://www.vjforums.com/showthread.php?threadid=3833