def _parseMediaInfo(self):
"""
Invoke the external program MediaInfo and parse its output
to a dictionary
"""
# the program path to MediaInfo should be set otherwise
env = {'path': env_mediainfo_dir}
# the command for MediaInfo is a fixed command
com = [com_mediainfo, '-f', self.name]
# invoke the external program
proc = externalProcess(com, env)
# read the programs output line by line and parse the output to a dictionary, obtaining all information
info = {}
state = 'start'
stream = 0
for line in proc.execute():
list = line.split(":")
# recognize the sections ('General','Video','Audio','Text')
if len(list) == 1 and list[0] != '':
state = str(list[0].lstrip().rstrip())
# print "New state: ", state
elif len(list) >= 2 and list[0] != '' and list[1] != '':
# recognize several stream identifier
if str(list[0].lstrip().rstrip()) == 'Stream identifier':
stream = int(str(list[1].lstrip().rstrip()))
continue
# save the information to the dictionary
key = state + "_" + str(stream) + "_" + str(list[0].lstrip().rstrip())
while key in info.keys():
key += "_"
info[key] = str(list[1].lstrip().rstrip())
return info
def runTest(self): self.process = externalProcess(com_1, env) assert self.process != None, ' Could not initialize external process' count = 0 for line in self.process.execute(): count += 1 print count, line assert count == 23, ' external process returned wrong number of lines'
