2D Barcode User Guide

Watch the tutorial here: http://www.youtube.com/watch?v=TVSW6UcOcIY

2D Barcode is a generator plugin that lets you generate a Quick Response “QR” code of any size for any URL or other message. Simply type the URL or other message you would like to encode in the “URL or Message” area and set the position and scale. QR codes in your video can then be read by a smartphone camera and code scanner app.

QR Code

A QR Code that says "www.Dashwood3D.com

2D barcode is a generator that can be found in Generators in Motion, Final Cut Pro 7 or X, and can simply be dragged above clips in your timeline.  It can be found under “Dashwood 2D Barcode” in the Effects Palette in After Effects or Premiere Pro, but should be applied to an adjustment layer or solid above the rest of your layers.  Mac OS X Mavericks is required to use this generator.

Text or numbers input

Simply type the URL or alphanumeric message you would like to encode into the text input area marked “URL or Message.”  Final Cut Pro X users will need to click the “Edit URL or Message” button on screen when the generator is selected in the inspector.

Error Correction

Codewords are 8 bits long and use the Reed–Solomon error correction algorithm with four error correction levels. The higher the error correction level, the less storage capacity. The following table lists the approximate error correction capability at each of the four levels:

Level L (Low) 7% of codewords can be restored.
Level M (Medium) 15% of codewords can be restored.
Level Q (Quartile) 25% of codewords can be restored.
Level H (High) 30% of codewords can be restored.

In larger QR symbols, the message is broken up into several Reed–Solomon code blocks. The block size is chosen so that at most 15 errors can be corrected in each block; this limits the complexity of the decoding algorithm. The code blocks are then interleaved together, making it less likely that localized damage to a QR symbol will overwhelm the capacity of any single block.  The default Level is Q, but should be lowered if you are using a long string or URL.  A high level of error correction will allow you to overlay a logo above your QR Code* and it will still be readable.

Scale, Position & Angle

Set the size of the QR Code* with the scale slider and adjust its position with the x/y coordinates or the point control.  Short URLs and 4K content for 4K displays can be smaller, but longer text strings will create smaller blocks within the QR code, possibly necessitating enlargement with the scale slider.  The Angle control and rotate the QR Code by 90 degrees clockwise or counterclockwise for use in vertically oriented displays.

Background

The default background is transparent so the 2D Barcode can be layered on top of another video layer, but you can also choose to make the background a solid white or black colour.

 

Adding your company logo

Because of the high level of error correction in a QR Code*, a large portion of the code can be hidden and still be scanned successfully.  This method can be used to add a logo to your QR Code*. The plugin supports alpha channels on Quicktimes or png files, but it is recommended that you add a border to your logo.
In FCP7 and Motion just drag your logo to the Custom Logo image well.
In FCP X click on the Custom Logo image well and then select your imported logo from your Event and click the Apply button.
In After Effects or Premiere Pro drag your logo to a different layer and then disable its visibility.  In effects palette for 2D Barcode select the layer with your logo from the Custom Logo popup.

Logo on top of QR CodeYour logo will appear in the center of your QR Code at its maximum size (either the actual dimensions of the logo, or the maximum scaled dimension to still fit inside the space occupied by the QR Code.  You can manually scale down your logo with the Logo Scale slider. It is important that nothing cover the three large squares in the corners.

The “Use Error Correction Limit” checkbox will calculate how much area your logo can occupy at the currently chosen Error Correction Level and scale it accordingly.  For example, if error correction is set at 30%, then 2D Barcode will only allow your logo to occupy 30% of the usable area.  The manual Logo Scale slider can still make the logo even smaller but it is recommended to leave it at a value of 1.0.

It is important to test the readability of  your QR Code with a logo by using a smartphone app like Scan. If it can’t be scanned then adjust the Logo Scale slider until it can be successfully read.

* QR Code is a registered trademark of DENSO WAVE INCORPORATED
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