feh(1): clarify that --conversion-timeout is mandatory for convert and dcraw

The gif format is also supported, but only for static images.

In case of animations, only the first frame will be shown.

.

If the convert binary

.Pq supplied by ImageMagick

is available, it also has limited support for many other file types, such as

svg, xcf and otf.

If dcraw is available,

.Nm

also supports RAW files provided by cameras and will display the embedded

thumbnails.

Use

.Pp

.

When invoked with

.Cm --conversion-timeout Ar timeout

with a non-negative value to enable support for these formats.

.Po

and a non-negative

.Ar timeout

value

.Pc ,

.Nm

also has limited support for various other file types by means of external

conversion programs.

If the dcraw binary is available,

.Nm

will use it to display the thumbnails embedded into RAW files provided by

digital cameras and similar.

If the ImageMagick convert binary is available,

.Nm

will use it to load file types such as svg, xcf, and otf.

.

.Pp

.