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docs: flesh out gst-launch-1.0 man page a little

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Fix up default location of the registry.

Mention more options for GST_DEBUG (wildcards and
named debug levels).

Explain what to do with the dot files that can be
produced by setting GST_DEBUG_DUMP_DOT_DIR.

https://bugzilla.gnome.org/show_bug.cgi?id=693607
This commit is contained in:
Tim-Philipp Müller 2013-02-13 23:27:16 +00:00
parent 21c4c718b2
commit b22385af0a
1 changed files with 12 additions and 6 deletions
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18
tools/gst-launch.1.in
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@ -406,20 +406,26 @@ samples and a sample rate between 32kHz and 64KHz.
.SH "ENVIRONMENT VARIABLES"
.TP
\fBGST_DEBUG\fR
Comma-separated list of debug categories and levels, e.g.
GST_DEBUG=totem:4,typefind:5
Comma-separated list of debug categories and levels (e.g.
GST_DEBUG=totem:4,typefind:5). '*' is allowed as a wildcard as part of
debug category names (e.g. GST_DEBUG=*sink:6,*audio*:6). Since 1.2.0 it is
also possible to specify the log level by name (1=ERROR, 2=WARN, 3=FIXME,
4=INFO, 5=DEBUG, 6=LOG, 7=TRACE, 9=MEMDUMP) (e.g. GST_DEBUG=*audio*:LOG)
.TP
\fBGST_DEBUG_NO_COLOR\fR
When this environment variable is set, coloured debug output is disabled.
.TP
\fBGST_DEBUG_DUMP_DOT_DIR\fR
When set to a filesystem path, store dot files of pipeline graphs there.
When set to a filesystem path, store 'dot' files of pipeline graphs there.
These can then later be converted into an image using the 'dot' utility from
the graphviz set of tools, like this: dot foo.dot -Tsvg -o foo.svg (png or jpg
are also possible as output format)
.TP
\fBGST_REGISTRY\fR
Path of the plugin registry file. Default is
~/.gstreamer-GST_API_VERSION/registry-CPU.bin where CPU is the machine/cpu type
GStreamer was compiled for, e.g. 'i486', 'i686', 'x86-64', 'ppc', etc. (check
the output of "uname -i" and "uname -m" for details).
~/.cache/gstreamer-GST_API_VERSION/registry-CPU.bin where CPU is the
machine/cpu type GStreamer was compiled for, e.g. 'i486', 'i686', 'x86-64',
'ppc', etc. (check the output of "uname -i" and "uname -m" for details).
.TP
\fBGST_REGISTRY_UPDATE\fR
Set to "no" to force GStreamer to assume that no plugins have changed,