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by dylan604 984 days ago
using the example of ffmpeg, you can use things like -f in front of -i to describe what the incoming format is so that your homebrew exporting can send to stdout piped to ffmpeg where reads from stdin with '-i -' but more specifically '-f bmp -i -' would expect the incoming data stream to be in the BMP format. you can select any format for the codecs installed 'ffmpeg -codecs'