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mmcwilliams 2019-05-30 21:29:49 -04:00
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# bipack
Script for simulating traveling mattes with ffmpeg.
Script for simulating traveling mattes with ffmpeg. Achieve the effect of bipacked film with high contrast masks with a simple bash script.
[Read more about traveling mattes.](https://en.wikipedia.org/wiki/Matte_(filmmaking)#Bi-pack_process)
## Requirements
Uses `ffmpeg` to generate matte files, apply mattes as alpha masks and render final video.
Uses `ffmpeg` to generate matte layers, apply mattes as alpha masks and render the final video.
Installation instructions for ffmpeg here: https://github.com/adaptlearning/adapt_authoring/wiki/Installing-FFmpeg
@ -14,4 +16,10 @@ Installation instructions for ffmpeg here: https://github.com/adaptlearning/adap
This command will take video `A.mp4` and `B.mp4` as image sources while using `matte.mp4` as a high contrast matte which seperates the two image sources.
![bipack examples](img/example.jpg?raw=true "Examples")
![bipack examples](img/example.jpg?raw=true "Examples")
## Explaination
This script started as a multi-command experiment that finally got reduced to a single command that leans heavily on ffmpeg's `maskmerge` filter: [Documentation](https://ffmpeg.org/ffmpeg-filters.html#maskedmerge)
Uses 1280x720 resolution and Apple ProRes 422 HQ as the output format, right now but change that easily in the script. Check it out!