This is a small Go program that takes a 4:3 aspect ratio video file, and transforms it to a 16:9 video using the GoPro SuperView method. This means that the image is not naively scaled, but a dynamic scaling is applied where the outer areas are stretched more while the center parts stay close to the original aspect rate.
This is not a 1-1 copy of the GoPro algorithm, but an attempt to reach similar quality of output using the open-source FFmpeg encoder.
Credits for the idea go to Banelle, who wrote the initial (Python) implementation.
Here is a quick animation showing the scaling, note how the text in the center stays the same:
This program requires FFmpeg to be installed on your computer. If needed, please install it using one of these ways:
- Linux: install from your local package manager, for example:
apt instal ffmpeg
- Windows: Download from https://www.gyan.dev/ffmpeg/builds/ and extract the
ffmpeg-release-full7ZIP file in the same directory as superview
- macOS: Download from https://evermeet.cx/ffmpeg/ and put in the same folder as superview, or install using Homebrew:
brew install ffmpeg
Download the latest release from the releases page on GitHub. There are two versions: a graphical version called
superview-gui and a command line program called
superview-gui, simply double-click the icon. Choose an input video file, optionally change some settings and click "Encode". The program will ask you where to save the output.
superview-cli, run the program with the
-i (input file) parameter. Optionally, you can provide a
-o (output) and
-b (bitrate) parameter. Full usage instructions:
Usage: superview-cli [OPTIONS] Application Options: -i, --input=FILE The input video filename -o, --output=FILE The output video filename (default: output.mp4) -e, --encoder=ENCODER The encoder to use, use -h to see a list. If not specified, it takes the standard encoder of the input file codec -b, --bitrate=BITRATE The bitrate in bytes/second to encode in. If not specified, take the same bitrate as the input file -s, --squeeze Squeeze 4:3 video stretched to 16:9 (e.g. Caddx Tarsier 2.7k60) Help Options: -h, --help Show this help message
If you want superview from source, run
go build superview-gui.go or
go build superview-cli.go depending on which version you'd like to build. See build.sh for an example how to cross-compile.
Thanks goes to these wonderful people (emoji key):
This project follows the all-contributors specification. Contributions of any kind welcome!