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Full Res. Rendering Quality Comparison Question
Source is from an HF100 at 1920x1080x12 @ 60i.
While doing some tests, I’ve noticed that setting the Full Res. Rendering Quality to Preview gave me a more sharp and clear picture than on Good and Best. Everyone says to set it to Best, and I’ve always done so– but the ghosting effect is something not desired.
Properties Settings:
1920×1080
Upper Field First
1.000 (Square)
29.970 (NTSC)
Preview, Good, and Best (all tested as shown in the picture)
Interpolate FieldsMy question is:
WHY does it come out sharper with more detail when set to Preview and not on Best? I am open to do some further testing if anyone has any suggestions.
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4 Replies
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Thanks to the screen grab, this question is a few magnitudes easier to answer: Thanks!
First, without understanding anything else, I think you can eliminate the ghosting by right-clicking the clip on your timeline, Properties > Video Event tab and select “Disable resample”. This will “solve” the “problem,” but it’s not necessarily the right way to do it!
OK, now the unfun part: What you are seeing is Vegas interpreting and drawing a frame at a particular frame rate from source footage that does not match the frame rate. This can happen at the project level (although it looks like your project matches your source) or on the render (which probably does not match the source, unless you are rendering out interlaced). You can troubleshoot this BEFORE you render (which is a huge timesaving deal!) by setting your Project Properties to match your output and then toggling through the various Preview window quality settings: the Preview window will show you exactly what your very helpful screenies show. Handy!
So this raises the REAL question: What render settings are the right render settings? But first, you need to ask: Are the still frames with the ghosting a problem? Yes, if you want still image screen grabs, but the video might look best this way in full motion and Vegas’ interpretation of the frames might be exactly what you want. If you disable resampling, you will get rid of the “ghost”, but the motion might become noticeably sharp and unnatural. And this depends on the destination: Blu-ray? YouTube? iPod? Old skool CRT? Computer monitor?
We know your source (thanks for posting that detail too): What is your intended destination?
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First off, thanks for the quick response. Okay, here we go…
1- I have Resampling disabled in that screenshot.
2- I have attached another screenshot of my Project Properties overlaying the Vegas edits.
3- In full motion, the ghosting and blurred details/textures aren’t acceptable for me– in both SD and HD formats. I’d like to retain the details seen in the “Preview Quality” edits rather than a washed look like the “Best Quality” I’ve been getting. I understand we try to smooth out the sharp and unnatural motions, but this edit will ultimately be made for home use on DVD and Blu-ray. As far as I can tell, Preview Quality gives more crisp and detailed moving pictures than Best Quality.I’m so lost. o_O
Note: When rendered as Uncompressed AVI or even 720×480 MPEG-2, the end results are the exact same as before. I’ve tried Vegas’ Uncompressed and Lagarith Lossless modes, and Vegas’ MPEG-2. Preview Quality still has sharper, more detailed images, frame-for-frame. I’ll upload the raw MTS file and maybe you guys can play around with it in your leisure time to see what you can get.
Link to RAW .MTS to those who can show me the light.
About 20MB. Shot on HF100, 1920x1080x12 source @ 60i.
https://hotfile.com/dl/20245754/2efcb7f/00021.MTS.html -
You are definitely not lost and I promise you are headed in the right direction, because now we are getting somewhere.
Here’s exactly what I did:
(1) File > Properties, clicked the Match Media Settings button and selected your file (00021.MTS).
(2) Verified “Full resolution render quality” was set to Best.
(3) Dropped the clip on the Timeline and moved to frame 24.
(4) Set Video Preview to Best (Full) and…
(5) Checked out the video with the window displaying 1920×1080 and then windowed.Result? What you see is what you get: Entirely normal 1080i interlacing, which will look fine (i.e., as good as the original footage) when rendered out 1080i to Blu-ray.
“Interlaaaaaaaacccccciiiiinnnnnngggggg! Yyyyyaaaaarrrrgggggghhhhhhhh!”When the Preview window is resized (I noticed in your screenies that your window is not full-res), even by a couple of pixels, the interlacing is hidden, but it’s really still there and we are not seeing the actual Vegas output, only a resized version of it.
You can definitely also see that the ghosting in your previews and screenshots is a result of Vegas deinterlacing. So we’ve identified the “problem,” although it’s not truly a problem, just a matter of choice and deinterlacing method. There are two ways to do this:
Blend the fields together. This has the advantage of keeping all 1080 lines of HD resolution, but will result in the ghosting you are seeing on high-motion.
Interpolate which just tosses out one field and duplicates the other. This has the advantage of eliminating the ghosting on motion, but you sacrifice half of your resolution and only get 540 lines of what is now basically SD resolution video.
Two steps to implement this:
(1) File > Project Properties – Field order to “None (progressive scan)”
(2) Switch the Deinterlace method to “Interpolate fields”.So now the hard part is making the choice: Ghosts or Half Resolution? And the decision will depend on the destination for the video. As I noted, my recommendations would be:
* For Blu-ray destined for the living room television, keep the project interlaced and at full-resolution. If you like the look of the source video straight from your camcorder on your TV, you’ll like the look of the Blu-ray, however…
* If the source video looks interlaced and crappy on on your modern HD progressive scan TV, that can be fixed by deinterlacing and probably tossing away one field.
* For DVD, an interlaced 480i60 DVD might look fine, but you are going to 480 lines anyhow, so I wouldn’t sweat the loss of resolution from deinterlacing at all. -
I understand what Interlacing will do, but thanks for the heads up nonetheless.
You just nailed the coffin shut on this old issue of mine. Your suggestions for DVD and Blu-ray seem to be the only solutions that work so far. I’ll be sure to look your name up again if I have issues with workflow outside of home videos. Thanks again!
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