Chris Borjis
Forum Replies Created
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If you’ve never had the problem or heard of it, thats great,
but it is an issue on some G5 quad systems. The apple community
has had its share of this very issue. VERY cheap like less than 20 dollars cheap UPS in particular can cause this problem.We had a ups I later found out was not a good brand.
The G5 would randomly shut down.
I looked it up on the web, saw that it could be the ups, removed it from the loop….problem solved.
🙂
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[Borjis] “will hold together way more likely than a 25 GOP would.”
sorry that should be 15 GOP
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[Doubleheader] “Now how do I find this upper and lower field thing. Another source told me the same thing, but I could not find it on Compressor, etc.
Also what is field dominance…same thing as upper and lower you mentioned.”
yeah upper and lower fields and dominance are the same thing.
you have to go into the presets of compressor to find it. its usually set to auto.
I find that if you compress out of fcp (though it takes a little longer) compressor will always get the field order right as long as your footage was properly interpreted. I get the feeling your clips that jitter are not properly interpreted. so right click and get the settings for your clip and right click where it says the field dominance and change it to the opposite, then re-insert it into your timeline. It won’t change it just by changing it in the bins, you have to remove it from the timeline, change it, then put it back in. (at least thats how I have to do it)
I’ve also found that if I just capture clips from digibeta or bsp and go right into compressor it always improperly interprets the fields (it always goes lower instead of upper).
As for the GOP structure, making it 7 instead of 15 does make the codec less efficient and bigger file sizes occur BUT you have a lot more I-Frames which means a scene/shot with potential to pixellate on fast motion where everything is moving, will hold together way more likely than a 25 GOP would.
Thats one reason why the sony fx1/Z1 camera with its 15 frame GOP can’t hold the resolution that a JVC HD100 can with its 6 frame GOP during a trying shot showing everything on the screen moving at once.
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Is it plugged into a surge protector or battery backup?
unplug it and the problem will likely be solved.
We had random shutdowns on our G5 quad. They’re REALY picky when it comes to the power source and unless you have a really expensive high load rated battery ups or surge protector, it will shutdown out of the blue.
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best quality and 5 hours is like opposing sides of a magnet.
It will never stick.
You could probably do a 320 x 240 quicktime at 15 fps and manage it though.
full raster 30fps is almost out of the question for that time period without compression artifacts happening.
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just standard non-additive dissolves.
all we use really. cuts and dissolves.
we also tried setting the opacity from the start and end but fcp will not do opacity on a targa frame. it has to be video…..another bug imo since every other nle can do that.
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for some reason seeing interlacing on a mac is a big issue.
I don’t know why, but it is.
View your DVD or do a short encode to DVD as a test.
on a television it will look fine.
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That shouldn’t be a problem.
I was told that by monitoring HD on DVI-D and outputting SDI channel B
out to an SDI SD display will show the downconversion (as specified in the control panel preferences)I can’t get it to work though, all i see is snow on my sd monitor.
Wish it would.one way would be to just do the down conversion with compressor which looks pretty good actually if your settings are set for high quality on the scaling section.
You could also output to HDCAM then capture it through the hardware downconverter, which is super high quality.
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I think their could be.
is DVCPro 50 4:2:2 or 4:1:1?
in any case the more bits the better usually.
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I wish compressor would allow you to set custom GOP’s though.
As far as i know you can only do 15 or 6.
Though 6 is pretty good and much better than 15.