Generates a test video containing a series of QR codes that, when read, will equate to the current time in the video it exists or supplied json provided at runtime.

1. npm install
2. ./bin/cli.js {options}

• name/n - Desired name of the output file's name. Extension not required.
• extension/ext - File extension desired. Default: mp4
• length/l - File extension desired. Default: 30
• audio/a - Path to audio file to be used. default is also an option and a silent audio file will be used for source. Default: none
• json/j - Allows for specifying a config.json file containing data to be embedded in QR image. See config.json for example. Handlebars placeholders can be used to set current frame with {{frame}} and timestamp with {{timestamp}}. Default: none
• framerate/f - How long each image should be displayed compared to the framerate of the output video. (-r) Default: 30.
• qrs-per-period - File extension desired. Default: 1
• video/v - Generate video with QR images. If set to false, only QR images will be generated. Default: true
• temp/t - Override where the QR files are stored. Default: OS specific temp directory.
• size/s - Size of one module in pixels. Default: 6
• ec-level/e - Error correction level. Default: Q

$ ffmpeg -framerate 1 -i qrs/img%d.png -i input_audio.mp3 -c:v libx264 -pix_fmt yuv420p -r 30 -shortest -y output.mp4

• The size of each block in the index.js must be even.
• If using audio, player's play head will likely not be in sync with image change. jsmith Note: I'm using this in playback testing, and so far it hasn't made itself an issue.

Gary Katsevman & Jayson Smith