I need help with my videos...
Not sure where to post this, but are there any video experts out there that can help me figure out how to get rid of the video distortion on my strings in my videos? Example here...
Everything else looks OK. The strings have a distortion or a rainbowing thing going on. Don't know if I need to upgrade cameras or if I'm using the wrong settings. I'm using a Canon Eos T4i (2013) and the settings are... 1280x720 60fps I'm using a Canon EFS 18-135mm lens. Editing in iMovie. Thanks so much, I really want to give my subscribers the best possible product. Tom |
Pretty sure that's simply a lighting issue. Try more lights, a different angle and different spectrum lighting. One or more of these should cure the issue.
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Looks like compression artifacts to me. Could also be a function of the high frame rate.
My daughter shot an entire web series on a T4i that had the clarity of a much more expensive camera, so I know it can be done. Shoot largest possible format, 24fps, 1/50th for your shutter speed. Export at maximum size / least compression. A 20 minute video could end up being 1-2 GB, but you can just upload to YouTube overnight. |
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And the RECORD section is usually where video geeks meet (grin). Fran |
Perceived distortions notwithstanding (they aren't distracting to me, by the way), that's an excellent guitar lesson video.
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Moiré pattern
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It's a compression artifact. (What @endpin said.)
You need to render at the initial shooting resolution, which you might experiment with, like full HD (1920x1080) and only 24fps. And wear a simple, dark, solid color shirt so you're not making the compressor go mad with that, too :). P.S. YouTube is going to compress the snot out of what you upload *even more*, so send them the best, most original shooting format. |
It is not just the strings - there is aliasing on the guitar top growth rings, guitar purfling and the rosette when you move the guitar.
What all these have in common is fine line detail + motion + reflection from the overhead lighting over your right shoulder |
Thanks everyone. Great tips. I'm working on them now. The dark shirt thing I realize looking back at older videos where I didn't have this issue as back. I'm going to experiment with lots of these changes and hopefully this novice videographer can make some strides.
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Conclusion: In my own personal estimation (AKA, IMOPE) the distortion observed is not related to variety or color or pattern of shirt worn--or even compression imperfection artifacts, for that matter; too, no moiré pattern contributed to the "problem"--if that were the case, you'd see such a pattern on all guitar strings in all videos, just as one observes the moiré on a specific type of shirt worn in every imaginable kind of video format, under every manner of lighting condition. My own opinion (in general agreement with previous poster 619TF) is that the explanation involves various variables related to artificial illumination--positioning, relative intensity, and angle of lighting used, for example. Some video illustrations. Here's a past video where you're wearing a simple white shirt (with no "confusing" pattern) in the identical setting featured in that original video (post #1). Note how those same distortions occur along the strings of the resonator--especially prevalent beginning at around the 35 second mark: The original video, from post #1 in this thread: And here's the video where you're wearing that black shirt (note dramatic difference in lighting arrangement): Here's a video of you wearing a plaid shirt in a different lighting situation. No distortions occur. And, finally, here's as video of you wearing that same plaid shirt seen in original video (post #1). Note absence of "aliasing"/distortion. Note difference in lighting situation: Of course, to complete the experiment, go ahead and wear that black shirt under the identical lighting conditions used in the original video. See what happens. |
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Example: https://youtu.be/fOhnvuoooI0 (wrong kind of shirt with the rendering done in the video) P.S. If your video software offers options on whether to render at a faster speed or with better quality, and you have the time, try both to see if it makes a difference. In my experience, it sometimes does, and sometimes doesn't, depending entirely on all those variables noted. Best of luck. |
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