Recent content by guyburns

You can download one of the "Worlds" here. This is a 1080P example in copper. Some I filmed at 2160P (4k). The AV isn't finished, as these "Worlds" are just chapter markers, but I uploaded this example so my "Depth of Field" advisor could see the result (he was the fellow who spent an evening...

Thanks for the responses. A rigid system, string or stick, would reduce resonance but it would be very difficult to make the "World" hang central, as it does when using a string. I reckon you'd see wobbling. Anyway, my pole idea, while not eliminating resonances, slowed them down so much that I...

Background I'm doing an AV about a friend who died 3 years ago. In his spare time he made hundreds of tiny, what he called "Worlds", sculpted out of copper, brass, aluminium, ranging from 1cm to 3cm across, hollow. They don't weigh much. I've set up a rig to film them rotating at 1 RPM. About a...

I'm just about to try the "spirit level" technique. Why I didn't try it first up is because… well, you did ask… Workflow Ten years ago, at the start of my AV projects, I experimented with rotating the image in PS, but it didn't fit easily in my workflow. I've exported thousands of images to my...

Thanks for all the feedback. This is more complicated than I thought. I buggered up in a big way wanting a solution for 2.5. V can't get that big (but if it could, exporting at 2700P could handle it). And there's something else I hadn't thought of. If a photo had the horizon at more than 45º, I...

Thanks Jack Action. So Google can be made to work; just put in "deg" in the appropriate place. Google gives the result much quicker, but the Wolfram site is more flexible. I think I'll bookmark both. Next problem Given four values of V, I want to solve this equation for R… V = 2.0397 • SIN...

Thanks Filip. Your link works well, can be bookmarked, and saves the formula so it can be changed. While I was trying the Maths solver from Google, a box popped up asking if I had any suggestions for improvement. My goodness, did I have some suggestions! Wasted more than 30 minutes of my time...

This is a simple question, but after 30 minutes on Google, no sensible results. I want to solve this equation: 1/(2.04Sin(29.36 + 0)) on a regular basis. My idea was to have that term as a Google search, saved as a bookmark. The idea has worked well for years for another formula, but without...

Hey, thanks for that. I just tried it in Premier and it works, except you made a typo. The formula should have been PX2 = PX1 + AX2 - AX1. And following your suggestion, for scaling (S in percent) I have come up with the formulaes: PX2 = PX1 + (AX2 - AX1) • S/100 PY2 = PY1 + (AY2 - AY1) • S/100...

There will be a Part 2 about a related mathematical problem. I use Premiere to generate updated versions of old-fashioned slide shows. Not much video is involved, mostly stills that I transform to bring them alive – pans, zooms, rotations. The Mathematics In Premiere, an image appears in what...

Thanks for all the suggestions, especially to Baluncore for finding that sign on Google Earth. That's the one, and there's another a bit further along the road. I went down there a few weeks ago, and yes, as per Baluncore, the road does have ruts and is rather bumpy. I made several passes...

PhysicsEnjoyer suggested I read this: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7411892/ An interesting read, but most of it too technical for me. However, three bits I did roughly follow, indicating to me that maybe I should try a solution with pH of less than 3, which may cause thinning of...

Thanks for the replies. Below is the result of 24 hours in the various solutions, then 12 hours in air. I added a drop of water to see how the water behaved. Hydrophobic -beaded up; hydrophylic- spread out. 1. White vinegar. Leaf losing colour, flexible, hydrophobic 2. Salt solution - no...

Background I live next to the Forth River in NW Tasmania. If it was free of weeds, the bank would be a lovely area, 5 metres below the parallel country road, 20 metres wide and about 800 metres long. But since settlement in the 1850s, introduced weeds have taken over -- blackberries so high I...

Thanks for the responses, they've given me something to think about. It looks like videoing at low speed will not decrease the bumpiness because of the variables involved. I had thought of letting air out of the tyres to make for a smoother ride, but from what respondents have said, that would...