y4mcolorbars(1) on Linux
The text 11876d44e18c, as Arch Linux 2026-11-01, Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it. The page shows this text now.
Create a YUV4MPEG2 stream containing a colorbar test pattern