yuvfps(1) on Linux
The text 421fe5d54a68, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
Converts to a different frame rate
Flags it lists
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-I -
-c -
-i -
-n -
-r -
-s -
-v -
-w