def create_pipeline(self):
unparsed = self.__pipeline
self.pipeline_string = self.parse_pipeline(unparsed)
try:
# don't bother creating a gstreamer pipeline
# pipeline = gst.parse_launch(self.pipeline_string)
return None
except gobject.GError, e:
self.warning('Could not parse pipeline: %s' % e.message)
raise errors.PipelineParseError(e.message)
class ParseLaunchComponent(FeedComponent):
"""A component using gst-launch syntax
@cvar checkTimestamp: whether to check continuity of timestamps for eaters
@cvar checkOffset: whether to check continuity of offsets for
eaters
"""
DELIMITER = '@'
# can be set by subclasses
checkTimestamp = False
checkOffset = False
# keep these as class variables for the tests
FDSRC_TMPL = 'fdsrc name=%(name)s'
DEPAY_TMPL = 'gdpdepay name=%(name)s-depay'
FEEDER_TMPL = 'gdppay name=%(name)s-pay ! multifdsink sync=false '\
'name=%(name)s buffers-max=500 buffers-soft-max=450 '\
'recover-policy=1'
EATER_TMPL = None
def init(self):
if not gstreamer.get_plugin_version('coreelements'):
raise errors.MissingElementError('identity')
if not gstreamer.element_factory_has_property(
'identity', 'check-imperfect-timestamp'):
self.checkTimestamp = False
self.checkOffset = False
self.addMessage(
messages.Info(
T_(
N_("You will get more debugging information "
"if you upgrade to GStreamer 0.10.13 or later."))))
self.EATER_TMPL = self.FDSRC_TMPL + ' %(queue)s ' + self.DEPAY_TMPL
if self.checkTimestamp or self.checkOffset:
self.EATER_TMPL += " ! identity name=%(name)s-identity silent=TRUE"
if self.checkTimestamp:
self.EATER_TMPL += " check-imperfect-timestamp=1"
if self.checkOffset:
self.EATER_TMPL += " check-imperfect-offset=1"
### FeedComponent interface implementations
def create_pipeline(self):
try:
unparsed = self.get_pipeline_string(self.config['properties'])
except errors.MissingElementError, e:
self.warning('Missing %s element' % e.args[0])
m = messages.Error(
T_(
N_("The worker does not have the '%s' element installed.\n"
"Please install the necessary plug-in and restart "
"the component.\n"), e.args[0]))
self.addMessage(m)
raise errors.ComponentSetupHandledError(e)
self.pipeline_string = self.parse_pipeline(unparsed)
try:
pipeline = gst.parse_launch(self.pipeline_string)
except gobject.GError, e:
self.warning('Could not parse pipeline: %s' % e.message)
m = messages.Error(T_(
N_("GStreamer error: could not parse component pipeline.")),
debug="Reason: %s\nPipeline: %s" %
(e.message, self.pipeline_string))
self.addMessage(m)
raise errors.PipelineParseError(e.message)