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Comparing x264 “RF” settings in Handbrake (examples) | mattgadient.com


Saved by uncleflo on January 6th, 2019.

Here, I’m taking a look at various RF settings in Handbrake, both in terms of visuals and filesize. I started with encodes from the “24” DVD (Season 6, Episode 1). If you have the same DVD and are looking to reproduce this test, the following settings were used: I tested the following RF values (listed in Handbrake under “Constant Quality”: 0, 10, 18, 20, 22, 24, 26, 28, 30, 32 I’ll start with a few screenshots at different RF values. There’s a video below too, but it comes with a bit of a caveat so might not show everything well for you. Pictures should work for nearly everyone. Note that the first one (RF0) is for reference (lossless). Worth noting that x264’s psychovisual enhancements (trellis, etc) do a pretty good job of keeping detail where you’d notice it (the face), at the expense of the stuff you normally wouldn’t notice while watching (like those background areas). Of course, this only goes so far – once the RF value is high enough, there’s no saving Jack’s facial features from the effects of compression!

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ISO 12233 — Resolution and spatial frequency responses | imatest


Saved by uncleflo on January 6th, 2019.

This new standard defines three test charts. The new Imatest eSFR ISO module performs a highly automated analysis of the new low contrast (4:1) Edge SFR chart and is available in Imatest Master and Image Sensor 4.0. This chart does not work with the highly automated Imatest eSFR ISO module, described below. For highly automated measurements (including squares near the corners, color patches, and wedges) we recommend one of the Imatest eSFR ISO charts shown below. These charts are fully compliant with ISO 12233:2017. Supported by the Imatest Star Chart module. Optional automatic region detection is available when used with a star pattern that has registration marks on the sides of the image.

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Freedom 360 - The Original 360 GoPro Mount


Saved by uncleflo on September 4th, 2016.

The Freedom360 is a mount, or a frame to hold 6 GoPro Hero3 cameras in a tight, cubic geometry to film material for a fully spherical 360 x 180 video, controlled via the GoPro Wifi remote. The 6 individual videos are downloaded from the MicroSD cards, and stitched with special software into a equirectangular or dome master file. After editing and compression, the movie can be played back with special panorama players or apps, allowing the user to look in all directions, or even apply “impossible views” like a “little planet” view. Dome masters can be played back with any dome projection system. Freedom360 focuses on the hardware aspects, and we will be bundling 3rd party video stitching suites as soon as they are released.

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A Javascript router in 20 lines


Saved by uncleflo on February 22nd, 2015.

Last week I found this post about writing a template engine in 20 lines, which in turn is inspired by John Resig's post on the same topic. I find them really simple, interesting and inspiring so I came up with the idea of making a simple client side router in just 20 lines of code.

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Modern Steel Construction » Steel Interchange


Saved by uncleflo on September 2nd, 2014.

If you’ve ever asked yourself "why?" about something related to structural steel design or construction, Modern Steel Construction’s monthly Steel Interchange column is for you! Send your questions or comments to solutions@aisc.org. Modern Steel Construction is the official publication of the American Institute of Steel Construction. MSC brings its readership in-depth information on the newest and most advanced uses of structural steel in buildings and bridges by focusing on innovative and cost-effective steel designs and the products that help bring them to life. MSC is directed exclusively to professionals in the construction industry who make and influence purchasing decisions—whether they are engineers, architects, building owners, contractors, fabricators, detailers or erectors.

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Radio Control Planes, Helicopters, Cars, Boats, FPV and Quadcopters - Hobbyking 


Saved by uncleflo on July 17th, 2014.

If you're serious about your quadcopter's performance, look no further than the AX-2810Q. Built with high-end 45SH magnets, a high pole count and custom motor mount, this motor is designed purely for multi-rotor applications. The AX-2810Q includes an integrated prop adaptor for use with many different style props featuring a 4mm shaft and adaptor sleeves for 5mm/6mm props. It also has an in-built aluminum mount for quick and easy installation on your quadcopter frame.

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How I built a carbon bike frame at home (and a bamboo frame too) - Instructables - DIY, How To, ride, outdoors, diy


Saved by uncleflo on July 17th, 2014.

I have built this carbon composite MTB frame four years ago using simple building method which is described in this Instructable. Of course, this method is not suitable for mass production, but if you plan to build just one or two frames for yourself, it is sufficient and you can build your own frame of a high quality. The feeling of riding a self-made frame is great! After years of riding, the frame is still okay and I am still alive too, although I prefer riding my bike equipped by the bamboo/carbon frame, which I have built using the same method described here. Until now, several frames have been built by this method in the world.

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Frame Building Courses


Saved by uncleflo on July 17th, 2014.

With 1-to-1 tuition, using quality hand tools and jigs, you will be able to make a made-to-measure lugged steel frame. Choose whether you would like a steel or carbon fork, the style of lugs and braze-ons and then, sometimes the hardest bit: choosing the colour.

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How I Made a Carbon Fiber/Epoxy Composite Bike in my Garage, by Damon Rinard


Saved by uncleflo on July 17th, 2014.

A) Geometry. I chose geometry that I knew I would like, based on bikes I've ridden. (For more information about how to choose frame geometry, see framebuild.htm.) This bike is a normal road bike: 59cm seat tube, 57cm top tube, average bottom bracket height, etc. To begin the full scale drawing, I plotted only the points required to hold the seat post, rear wheel, fork, etc. I did not draw any frame tubes yet. This bare bones geometry formed the skeleton. In the next section I describe how I fleshed it out. B) Shape. I designed a shape that is distinctive and appropriately proportioned for the loads I believe a bicycle experiences. I connected the dots from the geometry described above, thus fleshing out my skeleton. This is one of the parts I enjoyed the most: dreaming up all kinds of unusual shapes with which to make a bike. Trying to balance out the weight, strength, frontal area, looks, and doability is exciting to me. My bike is a beam bike, with the beam integrally made as part o

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Damon Rinard's Frame Building Links


Saved by uncleflo on July 17th, 2014.

I probably should start my list with myself, of course! You can see thumbnail photos of my first composite frame while it was under construction, or read the long version (with sources). I'm currently making my second composite frame. Chris Root has been doing a little framebuilding. Getting information and sources for supplies can be difficult since it is a somewhat obscure thing. So if you're interested in getting started yourself, he's put some links at his web site so you don't have to do all kinds of searching. http://members.home.net/cjroot/framebuilding.html. Stephanie Monfrey's Framebuilding Website at http://www.geocities.com/smonfrey/index.html is an excellent summary of jigs and fixtures, tooling, tubing and lugs, and helpful resources on line.

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Boardman Bikes : Road : RACE


Saved by uncleflo on July 17th, 2014.

With the Road RACE, experiencing the Boardman quality and attention to detail has never been easier. With performance enhancing design characteristics filtered down from the top level bikes, the Race is a versatile and package for the rider who wants to discover riding.

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Compressible Aerodynamics Calculator


Saved by uncleflo on July 16th, 2014.

This calculator is intended to provide a faster more convenient alternative to printed tables and charts (e.g. NACA Report 1135). The core of the code was written in Javascript by William Devenport at the Aerospace and Ocean Engineering Department, Virginia Tech. Five sets of relations are included; The relations themselves are taken from standard aerodynamics texts. Symbols have their usual meanings. 'Gamma' and 'rho' are substituted for the corresponding greek letters denoting the ratio of specific heats and density. Subscript 'o' is used to refer to stagnation or total conditions, superscript '*' refers to sonic conditions.

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Walnut Wood (triathlon) Bicycle Frame


Saved by uncleflo on July 16th, 2014.

As an income-less college student, it can be difficult to get into the sport of triathlon. Swimming and running are fairly cheap sports, but outfitting a bicycle that is competitive can be daunting. I bought a road bike from a bike swap for $600 a couple years ago, but it wasn't great for triathlons and I recently got a dent in the top tube that worried me. Luckily, as a part of my engineering curriculum I learned what I needed to build my own frame out of locally sourced black walnut wood. While this was a fairly intensive 5-month project (I only had time to work on it occasionally because of school), I'll do my best to give a good outline of the steps involved. Prerequisites are a good understanding of bicycle design (which I attained mostly by reading on the internet) and access to some wood working tools and a vacuum bag.

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2011 Felt DA - YouTube


Saved by uncleflo on June 20th, 2014.

Years of research, engineering and wind-tunnel development went into the all-new 2011 DA. Already ridden to major triathon wins by Felt athlete Terenzo Bozzone, this is the bike that left the competition in the dust. With UHC Ultimate+Nano carbon fiber material—shaped through extensive Computational Fluid Dynamics engineering and real-world testing—it's 14% more aerodynamic and 13% stiffer than the last-generation DA. It's also optimized for Shimano Di2 electronic shifting, with internal cable routing and an integrated battery mount.

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Giant - Making of Composite - YouTube


Saved by uncleflo on June 20th, 2014.

How Giant builds their Carbon Fiber Bicycles in their manufacturing plant.

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Carbon Fiber Bicycle Frame Building - YouTube


Saved by uncleflo on June 20th, 2014.

A playlist about building Carbon Fibre Bicycles, with lots of tutorials, and ideas.

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Saved by uncleflo on June 19th, 2014.

The truth is that I did not come up with this concept on my own. I found the Lotus Sport 110 Bike while doing some searches and fell in love with the design. The Lotus Sport won a leg or two of the Tour De France before the UCI came out with its bike standards; which pretty much killed the bike. Anyway there are still a few around, here and there, but that doesn't matter because I decided to build one with my own "flare." I decided to label this design the Z Frame because it looks like a "Z" (when looking at it from the left side). Here is a photo of the Lotus Sport 110- Click on the photo to go to the forum where I got this picture, or if you want more information.

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Custom 3D Printed Carbon Fiber Bike Frame


Saved by uncleflo on May 24th, 2014.

If you’re really into cycling and are on this site, chances are that over the years you’ve at least toyed with the idea of making your own frame. There’s something truly special and deeply rewarding about riding something that you’ve built yourself, and being able to choose whatever custom geometry and extras that you want only adds to the appeal.

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Saved by uncleflo on August 19th, 2013.

Introduction: The LANC Shepherd controls twin Sony digital cameras, and allows exposures, even with flash, that are remarkably well synchronized. The LANC Shepherd also controls twin Sony or Canon video cameras, allowing highly synchronized video frames and still capture.

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