Rendering

The render.py script allows for creating video renderings directly from Beatviewer.

Installation

1. Install Beatviewer
2. Download the render.py script

Usage

The script requires three arguments:

1. An audio file (WAVE format)
2. A video file
3. A path to an output file (MP4 format)

Currently, the script supports two modes, seek and slow. Default mode is seek. You may specify the mode with the -m, --mode argument.

Output file will last as long as the audio file. The video loops when reaching the end.

seek: Seek On Beat

This mode mimics the eponymous OBS effect. When a beat occurs, the script cuts to another random frame of the video.

slow: Slow Motion

This mode gradually and continuously reduces playback speed. When a beat occurs, the speed resets to 1x. It accepts two arguments.

Argument	Default	Description
-d, --decay	0.9	Playback speed decay factor. Typically takes values between 0.95 and 0.9. This should be set according to audio BPM and video framerate.
-j, --jumpcut	False	If True, when a beat occurs, the video jumps to the frame it should be at without slow down. The general playback speed is thus 1x, with regular slow downs and cuts.