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AVI interlacing problem.
I’ve imported a short (20 second) AVI file into AE 5.5, and am seeing some interlacing lines on objects. They are not visible on the raw file. Also, a shot panning across a fence caused the vertical fence posts to stutter as they went left to right, and once again the raw AVI file is clean & smooth. Does anyone have any sugestions as to what the problem may be?
Thanks!
Lee
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6 Replies
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what are you viewing the raw file in? is it in an nle and on a broadcast monitor? an nle and broadcast monitor will handle fields very well and will look very smooth. if the raw file was captured from tape then it should have fields. ae previews in whole frames, and may look jerky.
generally, in ae, you would like to remove fields (de-interlace) to effect the footage. you don’t have to for many effects (like color correction), but if you want to scale or vertically reposition your footage you will need to. you can then render back out to fields by using the render settings.
i can’t remember all the way back to 5.5 for the exact details for settings to correctly interpret fields and setting it up to render back to fields, but the help menu should explain a workflow for working with fields.
Kevin Camp
Designer – KCPQ, KMYQ & KRCW -
Kevin,
Thanks for the response. I’m viewing from an NLE (Premiere) on a Sony PVM broadcast monitor. The original file is a DV AVI that was captured from tape, so yes, it’s in fields. I’m not processing the AVI file in any way, I’m just using a motion background & a mask so the background fades into the edges of the video file. The main thing I’m having a problem with is the edge of the brim of a hat. It’s obviously a sharp line, but looks smooth in Priemere. I’ve checked the raw file, and it looks good… imported it into AE, then rendered it back out (without processing/changing it at all) and the edge of the hat looks rough. I’ll keep playng around with it, and reading more in the help files, but I thought AE should handle the DV AVI just fine if there is no processing done to it.
Thanks again!
Lee
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ae 5.5 may be interpretting your footage as having fields (later versions do), and removing those fields. ae also defaults to render without fields. so if you are bringing the footage into ae5.5 and rendering with default settings, you are probably de-interlacing your footage.
you should be able to set the render settings from the render queue… try clicking the underlined word next to render settings, usually ‘best.’ a window should open with the render settings, find one for fields and set to lower (ntsc-dv standard). that should put your fields back in order, and hopefully smooth things back out.
Kevin Camp
Designer – KCPQ, KMYQ & KRCW -
Kevin,
Ran another test w/the footage of the vertical fence posts as I panned. This was VERY visible so I thought it would be good to test w/this footage. From Premiere I exported a 4 second clip as an AVI 3 different ways. One was not altered at all, the second was de interlaced & on the third, I had no fields & de interlace selected. I imported them all into AE, did nothing to them, and exported them back out as AVIs. The original plays smooth, and the files that went into AE all have a huge stutter on the post as the camera pans.
Any other suggestions?
Lee
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THANK YOU!!! That was it… field render in the queue. Changed to lower fields to match the DV & it did it. This was a huge help, thank you again!
Lee
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great, that’ll save me some time trying to find a 5.5 manual… i know i have one here, some where.
Kevin Camp
Designer – KCPQ, KMYQ & KRCW
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