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How to extract frames from a video with transparency?

How do I extract frames from a video (.mov Apple ProRes 4444) with the alpha channel?

I need the PNG images so transparency is not lost.

I have 23 videos so I would prefer to automate the process.

Solution

  • If any reads this in future, this worked for me

    ffmpeg -i file.mov -r 24/1 output%03d.png

    Reference:

    1. Mulvya's comment
    2. Fastest way to extract frames using ffmpeg?