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Interlacing issue
Some here’s my workflow
I loaded a DVCam tape in via SD using standard 8-Bit Uuncompressed AJA Presets. I did this because Magic Bullet filters are being applied to the footage and I want to work uncompressed to keep it looking nice. After Magic Bullet’s ridiculous render time I have a good looking finished sequence. Now the sequence has to go to to DVSP for DVd output. I rendered part of the sequence in Sorenson as a test. The video looks quite good but when there is movement there are some interlacing issues. the usual jaggies along the edges of moving objects. It’s pretty distracting. I’m thought it was a field dominance issue but I’ve stay on Lower from capture to sequence to mpeg render. Any ideas?
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11 Replies
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slight amendment. I went back and looked frame by frame at the sequence. It seems like in some places there is a slight flicker like the fields aren’t matching up perfectly. Its barely noticable at all on the playback but maybe it’s getting made worse during the MPEG rendering process. I jsut spent like 2 days rendering these effects. I’m in alot of trouble if I’ve got to re-render this sequence. Any ideas?
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>I’ve stay on Lower from capture to sequence to mpeg render. Any ideas?
I believe, if you captured the footage via SDI to 8-bit Uncompressed, then you should be working in Upper field first
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he presets were set to lower. Is this one of those cases where FCP’s defaults are completely wrong?
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hi Peter
I just double checked the Easy Setup presets I have for Uncompressed 8-bit and it all says Upper …. I’m pretty sure they’ve always been OK in this regard, though there was an issue early on, with 5.0 I think, where there were presets that were incorrect and one had to manually replace the presets file
Andy
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>, though there was an issue early on, with 5.0 I think, where there were presets that were incorrect and one had to manually replace the presets file
i just took a look back through the late breaking new file in v5 and yes, there was a problem with incorect field order settings with IMX presets, that was fixed in the v5.0.2 update, and similatly with Uncompressed 8/10 bit PAL presets, that was fixed in the 5.0.3 update
In both cases you had to manually replace the preset files in order to make the corrected cversions available to FCP
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indeed you seem to be correct. I checked on another system here that a clean install of 5.1 was done. The field dominace is set to upper for uncompressed. The other system was upgraded and the preset is wrong.
Great looks like that tiny little oversight may have cost me 2 days. Normally it wouldn’t be a problem but any change I make to the sequence now requires the Magic Bullet to render again.
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these things are sent to try us Peter, sorry it wasn’t better news
Andy -
No need to be sorry it was my mistake. So what would be the easiet way to fix this? Do I have to recapture completely?
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no need to recapture … you need to change the sequence to Upper Field dominance and re-render … try it on a small test section first to verify that the results are good, then set it to render the whole shebang
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Trying that right now. Hope it works out. Thanks so much for your help man.
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