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GStreamer 0.10 Core Reference Manual | ![]() |
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#include <gst/gst.h> GQuark gst_parse_error_quark (void); #define GST_PARSE_ERROR enum GstParseError; GstElement* gst_parse_launch (const gchar *pipeline_description, GError **error); GstElement* gst_parse_launchv (const gchar **argv, GError **error); GstElement* gst_parse_bin_from_description (const gchar *bin_description, gboolean ghost_unconnected_pads, GError **err);
These function allow to create a pipeline based on the syntax used in the gst-launch utillity.
GQuark gst_parse_error_quark (void);
Get the error quark used by the parsing subsystem.
Returns : | the quark of the parse errors. |
#define GST_PARSE_ERROR gst_parse_error_quark ()
Get access to the error quark of the parse subsystem.
typedef enum { GST_PARSE_ERROR_SYNTAX, GST_PARSE_ERROR_NO_SUCH_ELEMENT, GST_PARSE_ERROR_NO_SUCH_PROPERTY, GST_PARSE_ERROR_LINK, GST_PARSE_ERROR_COULD_NOT_SET_PROPERTY, GST_PARSE_ERROR_EMPTY_BIN, GST_PARSE_ERROR_EMPTY } GstParseError;
The different parsing errors that can occur.
GstElement* gst_parse_launch (const gchar *pipeline_description, GError **error);
Create a new pipeline based on command line syntax.
Please note that you might get a return value that is not NULL
even though
the error
is set. In this case there was a recoverable parsing error and you
can try to play the pipeline.
pipeline_description : |
the command line describing the pipeline |
error : |
the error message in case of an erroneous pipeline. |
Returns : | a new element on success, NULL on failure. If more than one toplevel
element is specified by the pipeline_description , all elements are put into
a GstPipeline, which than is returned.
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GstElement* gst_parse_launchv (const gchar **argv, GError **error);
Create a new element based on command line syntax.
error
will contain an error message if an erroneuos pipeline is specified.
An error does not mean that the pipeline could not be constructed.
argv : |
null-terminated array of arguments |
error : |
pointer to a GError |
Returns : | a new element on success and NULL on failure.
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GstElement* gst_parse_bin_from_description (const gchar *bin_description, gboolean ghost_unconnected_pads, GError **err);
This is a convenience wrapper around gst_parse_launch()
to create a
GstBin from a gst-launch-style pipeline description. See
gst_parse_launch()
and the gst-launch man page for details about the
syntax. Ghost pads on the bin for unconnected source or sink pads
within the bin can automatically be created (but only a maximum of
one ghost pad for each direction will be created; if you expect
multiple unconnected source pads or multiple unconnected sink pads
and want them all ghosted, you will have to create the ghost pads
yourself).
bin_description : |
command line describing the bin |
ghost_unconnected_pads : |
whether to automatically create ghost pads for unconnected source or sink pads within the bin |
err : |
where to store the error message in case of an error, or NULL |
Returns : | a newly-created bin, or NULL if an error occurred. |
Since 0.10.3