fields not in sync? at DVinfo.net

Llewellyn Thomas · January 19th, 2003, 04:16 AM

Could someone please have a look at this image :
http://mysite.mweb.co.za/residents/net03472/index.html

It is a jpeg picture the full bitmap image is also availible at 1.2Meg, captured it off a video file using premiere.

It seems to occure only when the camera (Canon xl1s PAL) pans. I believe it is caused in the camera, but maybe it could be related to my pc.

Could anybody tell me the probabile cause.

Thank you

Llewellyn

Don Palomaki · January 19th, 2003, 07:17 AM

You are seeing a frame capture (two fields separated in time by 1/50/sec in PAL, 1/60 in NTSC) thus the comb effect at contrasty edges. This is cause by the camera motion in the pan, each field is seeing a slightly different image. To avoid this with the XL1, shoot in frame mode, or just capture a field.

Note that you will see a similar sffect without pan if you have a fast moving object in the image.

Jeff Donald · January 19th, 2003, 07:28 AM

This topic has been discussed before and with a good explanation here The original poster's link is broken but you'll see it is common for stills in NTSC or PAL.

Jeff

Rob Lohman · January 20th, 2003, 05:08 PM

I've also posted a lengthy reply on your other thread:

http://www.dvinfo.net/conf/showthrea...&threadid=6168

Llewellyn Thomas · January 21st, 2003, 01:02 AM

Thank you all very much.

Llewellyn

January 19th, 2003, 04:16 AM	#1
Llewellyn Thomas New Boot Join Date: Aug 2002 Posts: 21	fields not in sync? Could someone please have a look at this image : http://mysite.mweb.co.za/residents/net03472/index.html It is a jpeg picture the full bitmap image is also availible at 1.2Meg, captured it off a video file using premiere. It seems to occure only when the camera (Canon xl1s PAL) pans. I believe it is caused in the camera, but maybe it could be related to my pc. Could anybody tell me the probabile cause. Thank you Llewellyn

January 20th, 2003, 05:08 PM	#4
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	I've also posted a lengthy reply on your other thread: http://www.dvinfo.net/conf/showthrea...&threadid=6168 __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors

January 19th, 2003, 07:17 AM	#2
Don Palomaki Wrangler Join Date: Sep 2001 Location: Northern VA Posts: 4,489	You are seeing a frame capture (two fields separated in time by 1/50/sec in PAL, 1/60 in NTSC) thus the comb effect at contrasty edges. This is cause by the camera motion in the pan, each field is seeing a slightly different image. To avoid this with the XL1, shoot in frame mode, or just capture a field. Note that you will see a similar sffect without pan if you have a fast moving object in the image.

January 19th, 2003, 07:28 AM	#3
Jeff Donald Warden Join Date: Mar 2002 Location: Clearwater, FL Posts: 8,287	This topic has been discussed before and with a good explanation here The original poster's link is broken but you'll see it is common for stills in NTSC or PAL. Jeff

January 21st, 2003, 01:02 AM	#5
Llewellyn Thomas New Boot Join Date: Aug 2002 Posts: 21	Thank you all very much. Llewellyn