25 lines
1.1 KiB
Markdown
25 lines
1.1 KiB
Markdown
# bipack
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Script for simulating traveling mattes with ffmpeg. Achieve the effect of bipacked film with high contrast masks with a simple bash script.
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[Read more about traveling mattes.](https://en.wikipedia.org/wiki/Matte_(filmmaking)#Bi-pack_process)
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## Requirements
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Uses `ffmpeg` to generate matte layers, apply mattes as alpha masks and render the final video.
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Installation instructions for ffmpeg here: https://github.com/adaptlearning/adapt_authoring/wiki/Installing-FFmpeg
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## Usage
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`sh bipack.sh A.mp4 B.mp4 matte.mp4 output.mov`
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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.
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## Explaination
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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)
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Uses 1280x720 resolution and Apple ProRes 422 HQ as the output format, right now but change that easily in the script. Check it out! |