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HDV to DV and de-interlacing problems.
Hi,
I was wondering if anyone could help me out with this one. I’ve shot a music video, and it’s all bluescreen, and there a few shots I’m having trouble with.
This was all shot with a Sony FX1 and is being edited and composited in HDV. Before I go any further I’ve rendered everything uper fields first.
The first problem shot is a panning shot. I took it into after effects and got a good key, placed it in the Premiere Pro timeline and it looks great.
I wanted to try out a render in standard video, so in the settings dialogue I set it to DV/AVI – PAL etc..lower fields first. (I’m UK based), and rendered the full video. You can see some of the interlacing on the monitor as expected, but this fast moving shot just looks hideous, and it’s not that fast either.
I’ll try to describe what it looks like. Compared to normal interlaced footage on a monitor the lines look about 3 to 5 times thicker. Is this normal for fast moving objects ? I think my shutter speed may have been set badly during the shoot which could be adding to the problem.
I would burn a DVD and test it on my DVD player but my DVD writer just decided to die on me.
I may try de-interlacing these shots, and then interlacing them for the final render. I’ve heard this is not a good thing to do with footage that was originally shot interlaced. is this true ?
Thanks for your time.
Steven.
As this project is nearing it’s deadline, how do I go about putting this on to mini HDV tape ? and what is the best way to do an SD copy for DVD, just by setting it to DVD PAL etc… in the render settings ? Someone once said it’s best to set up an SD timeline, then put your HD project in there and scale it down to fit. Any suggestions ? -
3 Replies
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I think I may have figured it out but it’s causing ,e more problems.
I played around with the image in After Effects, stretching the window etc.. and the thick lines became apparant. Then I played the raw file in Windows Media player and noticed it’s stretched vertically, and the interlacing looks as it should.
Now why won’t it render out in Premiere Pro with the correct aspect ratio ?
I started this project using the Aspect HD trial plug in (I would really buy this but I can’t afford to right now), and using the Aspect HD settings my renders where correct. I’m trying AVI 1440×1080 etc… but I still get a stretched image.
How do you export HDV with the correct rectangular aspect ratio ?
Cheers.
I’ve been up for about 26 hours working on this thing.
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A few things you might want to try. Make sure you are using a widescreen SD project in Premiere. Also try rendering out upper fields first. All HDV is upper fields first. I am just guessing on the rendering upper fields first part but it can not hurt to try.
On your panning shot you can also try ficker removal.
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I think I’ve figured it out, thanks for that anyway.
I’m using Premiere Pro 2 trial version and my Aspect HD trial expired. I just found out that the trial version of Premiere Pro 2 does not support HDV editing, thats why the files are stretched, it must be, and this is causing the interlacing to look bad.
I have Sony Vegas platinum, so what I’ve done is rendered all the compositing work in After Effects, (which again due to my trial version of Aspect HD expiring is not rendering at 16:9), and put the files into Vegas, which allows me to render the files in HDV using the Cinfeform codec.
I put the files back into Premiere Pro 2 and set the render for widescreen 16×9 PAL etc.. and it looks fine.
Now I need to figure out how to put the finished piece back on to mini HDV tape. I figure if I render it through Premiere Pro as an uncompressed HDV AVI and import that into Vegas then I should be ok, shouldn’t I ?
Thanks for your help.
Steven.
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