Fuse can save movies
with sound in a specific file format (FMF). This recording is
very fast and has a moderate size, but you need to use the
fmfconv program in fuse‐utils to convert the format into regular
video and/or audio file. The Movie Compression Level preference
allows you to set the compression level to None, Lossless or
High. The default is Lossless. Recording a movie may slow
down emulation, if you experience performance problems, you can
try to set compression to None.
Fuse records every displayed frame, so by default the recorded
file has about 50 video frames per second. A standard
video has about 24‐30 frames per second framerate,
so if you set the Frame rate 1:n preference to 2 than recording
frame rate is reduced to about 25/s. The exact frame rate
depends on the Z80 clock frequency which varies depending on the
specific emulated machine.
Note: You can see all of the Spectrum graphics effects (for
example those in scene demos) only if the Fuse frame rate option
is set to 1, but in most cases like game software you can safely
use a setting of 2. Also, movie recording stops if the emulated
machine is changed while recording is in progress.
The recorded number of channels matches the sound preferences
which is set to mono by default. You can record stereo sound if
you use the AY stereo separation preference.
You can use the fmfconv program from the fuse-utils package to
convert a FMF-format recorded movie file into a standard video
file.