the supported values of your device(s) use @option{list_formats}.
Note that there is a FourCC @option{'pal '} that can also be used
as @option{pal} (3 letters).
+Default behavior is autodetection of the input video format, if the hardware
+supports it.
@item bm_v210
This is a deprecated option, you can use @option{raw_format} instead.