Hey Alan!

 :r !mplayer -vo help | sed 's/\t/        /;s/^/ mpl> /'
 mpl> MPlayer 1.5-12.2.0 (C) 2000-2022 MPlayer Team
 mpl> Available video output drivers:
 mpl>         vdpau	VDPAU with X11
 mpl>         xv	X11/Xv
 mpl>         gl_nosw	OpenGL no software rendering
 mpl>         x11	X11 ( XImage/Shm )
 mpl>         xover	General X11 driver for overlay capable video output drivers
 mpl>         gl	OpenGL
 mpl>         gl_tiled	X11 (OpenGL) - multiple textures version
 mpl>         dga	DGA ( Direct Graphic Access V2.0 )
 mpl>         fbdev	Framebuffer Device
 mpl>         fbdev2	Framebuffer Device
 mpl>         matrixview	MatrixView (OpenGL)
 mpl>         v4l2	V4L2 MPEG Video Decoder Output
 mpl>         xvidix	X11 (VIDIX)
 mpl>         cvidix	console VIDIX
 mpl>         null	Null video output
 mpl>         mpegpes	MPEG-PES to DVB card
 mpl>         yuv4mpeg	yuv4mpeg output for mjpegtools
 mpl>         png	PNG file
 mpl>         jpeg	JPEG file
 mpl>         tga	Targa output
 mpl>         pnm	PPM/PGM/PGMYUV file
 mpl>         md5sum	md5sum of each frame

fbdev no longer works on any of the hardware here but fbdev2 does and with at least two different graphics drivers.  I am guesing it will be the same there but I've only dealt with one nvidia and that was around 20 years ago.

Life is good,
Maurice

 o-  -o    o-   o-   o-   o-   o-   o-  -o   -o    o-   o-   o-   o-  -o    o-
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... Fidonet 4K - You load sixteen penguins and what do you get?
--- GNU bash, version 5.2.15(1)-release (x86_64-pc-linux-gnu)