diff options
Diffstat (limited to 'man/specgram.1')
| -rw-r--r-- | man/specgram.1 | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/man/specgram.1 b/man/specgram.1 index 8df7812..971af9d 100644 --- a/man/specgram.1 +++ b/man/specgram.1 @@ -56,6 +56,8 @@ See \fBEXAMPLES\fR for common use cases. .BR \fIoutfile\fR Optional output image file. Check \fISFML\fR documentation for supported file types, but PNG files are recommended. +If "\fB-\fR" is provided then the resulting image is written to stdout in PNG format. + Either \fIoutfile\fR must be specified, \fB\-l, \-\-live\fR must be set, or both. .TP @@ -75,7 +77,7 @@ Input file name. If option is provided, \fIINFILE\fR is handled as a raw dump of values (i.e. input file format is not considered). The program will stop when EOF is encountered. -If option is not provided, data will be read indefinitely from stdin. +If option is not provided or "\fB-\fR" is provided, data will be read indefinitely from stdin. .TP .BR \-r ", " \-\-rate =\fIRATE\fR @@ -325,6 +327,12 @@ Render a crisp output with a transparent background, so it can be embedded in a .IP \fBspecgram\fR -qe --bg-color=00000000 -i \fIinfile\fR \fIoutfile.png\fR +.LP +Generating from a file to stdout and displaying the output with \fBimagemagick\fR: + +.IP +\fBspecgram\fR -i \fIinfile\fR - | \fBdisplay\fR + .SH BUGS Frequency bounds (\fB\-x, \-\-fmin\fR and \fB\-y, \-\-fmax\fR) may exceed FFT window frequency limits when resampling is enabled (i.e. default behaviour), but may not do so when resampling is disabled (\fB\-q, \-\-no_resampling\fR). |