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Lower 3rd funkiness – what’s going on?
Hi Guys n gals,
I’ve posted this on the Kona forum too, not sure if it’s a Kona or FCP issue.
Cutting on client’s G5 Quad, 10.4.10, FCP 5.1.4, 5.5gigs RAM with a Kona LHe control panel version 2.01. PAL land.
We’ve cut HDV1080i, and I’ve placed finished sequence in to a Uncompressed 8-bit sequence for SD playout to preserve graphics and lower 3rd quality. End use will be DVD so not going to tape. Lower 3rds were created in Photoshop for HD and scaled to SD. I’m using image mask with an alpha in the image well (using luminance) to create the key for tthe lower 3rd. Clunky but client only has Photoshop Elements rather than full PS so no channel support. Text for lower 3rd created in FCP lower 3rd tool. Lowers (strap and text) fade on/off with cross dissolve (10f)
So far so good. Her’s where it gets wierd though. On render, the LHe output shows a ‘popping’ of the image below the first line of the lower 3rd strap. It lasts for the duration of the effect and disappears after. It ‘grows’ as the opacity increases (i’e for the duration of the fade in) and shrinks when the outgoing dissolve happens. I’d guesstimate a 5% increase in all axes but only below the strap.
If I export to QT (same settings) and play back via FCP and kona it’s still visible. Not visible if I play back via QT player. All video is legal and nothing seems out of the ordinary. It’s not doing it on a LiveType title at head of programme.
I’m stumped. Am I missing summat really fundamental?
Thanks in advance
Jason
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Before you criticise a man, walk a mile in his shoes.
Then when you do criticise him, you’ll be a mile away. And have his shoes.*the artist formally known as Jaymags*
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6 Replies
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Jason,
Let me get this straight–it’s just the strap that is being created in Photoshop elements and is keyed with the Image Mask effect?
-Tom -
Is the effect completely rendered? Even if FCP is showing “real time” (ie the slightly green bar), you sometimes have to render to get actual “real time” playback. Somehow this is called a feature.
Gordon Gurley
Director of Operations
Stanford Video -
Tom,
It is indeed just a strap. Created in PSE, then an alpha created in PSE too (B&W image). I’ve dropped the Image Mask effect on the strap, then dropped the alpha pic in to the image well of the effect – set to use luminance. It keys beautifully – nice and clean. It’s a way of getting round not being able to export a 32 bit TGA.
Looking more closely, it is just the area of the strap (from top to bottom and across to either side) that ‘pops’. The image under the strap (it’s translucent) grows in all axes by maybe 5-10%, but seems to be ‘anchored’ at the top. The picture below the strap isn’t affected, save for the fact it moves down to accomodate the enlarged strap.
Again, this is only viewable from the Kona outputs (currently CVBS in to a TV just for checking field issues) and not via exported quicktimes. DVDs authored from said QT are also fine.
Puzzling!!
Jason
_________________________________
Before you criticise a man, walk a mile in his shoes.
Then when you do criticise him, you’ll be a mile away. And have his shoes.*the artist formally known as Jaymags*
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I have no idea what’s causing this. Great mystery though. Your deliverable is the Quicktime? So the Kona output is not an issue at the moment?
Is the strap 100 percent opaque at the top and translucent at the bottom?
It’s not likely an RT Extreme Kona bug, because it happens on a rendered effect, not realtime.
I’ll try it on my LHe and see if it shows up.
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Tom,
The strap fades L to R, going from about 80% at left to 30% extreme right. Constant top to bottom.
You’re right about the deliverables – it’s not a show stopper, but one of those things that will bug me. Nice to know the why’s and wherefores so I don’t get caught out when it does happen again!
Jason
_________________________________
Before you criticise a man, walk a mile in his shoes.
Then when you do criticise him, you’ll be a mile away. And have his shoes.*the artist formally known as Jaymags*
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check your motion settings for scale and center point. make sure they are whole numbers and not decimals. if you are viewing it on an NTSC monitor via your Kona you are probably seeing the interlacing of subpixels. Just a thought. you wont see it in quicktime or on a HD resolution monitor or computer monitor as the resolution is higher and probably not interlaced.
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