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Can’t figure out why frames are ghosting
I’m seeing some ghosting and I can’t figure out why.
I have a main project at 1080-60i. I have ‘adjust media…’ unchecked.
Nested inside is another 1080-60i project.
In that project, I have some media that was shot at 720-60p. I’ve turned on the ‘disable resampling’ switch to avoid ghosting.Now, when I’m moving around on the timeline, I still see ghosting. See attached image for an example. I can’t understand why — if I open up the nested project, there’s no such ghosting present. But when it’s nested into the bigger project, it shows up.
Other cameras in the same project, which shot at 29.97, are not ghosting.
I’ve tried turning on the ‘disable resampling’ switch on the nested project as a whole. No joy.
Something I’m missing? I’ve never really understood the “adjust source media…” box in project properties.
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Further: Okay, weird. My preview window showed a badly ghosted image, but the snapshot I saved did *not*. Huh. Tried again. Preview bad, snapshot good.Turned preview window from Best (Auto) up to Best (Full) and no more ghosting in preview.
So …. guys, what should I learn from this?
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Radio guy in a TV world. Bigasssuperstar.com -
5 Replies
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One thing to learn. Don’t pay too much attention to the preview especially when it is not set to display the highest quality image. I usually don’t worry to much about previews as long as they are reasonably close. I defer quality judgements until I am seeing the rendered output on a suitable display device.
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Good advice.
At the risk of going off-topic on my own thread, Bob, can you lend any insight into what effect the “Full resolution render quality” project setting has on the end product? The default is ‘good’. What am I telling Vegas to do differently when I set it to ‘best’? It feels like an arbitrary vestige of an early version.
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Radio guy in a TV world. Bigasssuperstar.com -
The difference between Good and Best is the image resize algorithm used. A slower better algorithm being used for Best.
Resize comes into play if you have crops or resize with track motion.
Also if your source material is not the same size as your project and/or render size.Also, note that a render as template can override the project render quality.
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[Norman Black] “The difference between Good and Best is the image resize algorithm used. A slower better algorithm being used for Best.”
Norman, this is fascinating. I don’t doubt your analysis, but where did you learn that?
Because I am worry-wart, I often use “best” and even 32-bit Floating Point for Pixel format. Yes it takes forever, and I have never noticed much difference. Lately had been relaxing and leaving it at 8-bit.
But this resize thing of which you speak makes me want to know more.
Steve
Win7 Pro X64 on Dell T7500, MultiTB SATA, 8GB RAM, nVidia Quadro 2000, Vegas 12, 11, 10, 9 DVDA 6.0 & 5.2(build 135) Sony HDR-CX550V, Panasonic GH3 with LUMIX G X VARIO 12-35mm / F2.8 ASPH, LUMIX G X VARIO 35-100mm / F2.8
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Just checked another render…. the ghosting is sometimes there, sometimes not.
I’m going to go through and double-check that I haven’t accidentally slightly stretched the whole nested project somehow, as it doesn’t make sense that parts would be in sync (no ghosting) and parts out. All the clips have resampling disabled, so I’m still a bit stumped.
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Radio guy in a TV world. Bigasssuperstar.com
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