def getDuration(inputFileName):
try:
x=mob.doCommand('midentify %(inputFileName)s' % vars())
y=[ z for z in x.splitlines() if z.startswith('ID_LENGTH=') ]
assert len(y) == 1, str(y)
duration=int(float(y[0][10:]))
return duration
except:
raise mob.inContext(
'get duration of audio file %(inputFileName)s' % vars(),
sys.exc_info())
pass
def extractAudioSegment(inputFileName, begin, end):
try:
outputFileName='%s-%010u.mp3' % (os.path.splitext(inputFileName)[0], begin)
duration=end - begin
mob.doCommand(
'ffmpeg -i %(inputFileName)s -ab 128 -ss %(begin)s -t %(duration)s %(outputFileName)s' % vars())
return outputFileName
except:
raise mob.inContext(
'extract segment of audio [%(begin)s:%(end)s] from file %(inputFileName)s' % vars(),
sys.exc_info())
pass
def extractAudio(inputFileName):
try:
outputFileName=os.path.splitext(inputFileName)[0]+'.mp3'
mob.doCommand(
'rm -f %(outputFileName)s' % vars())
mob.doCommand(
'ffmpeg -i %(inputFileName)s -ab 128 -ar 48000 -ac 2 %(outputFileName)s' % vars())
return outputFileName
except:
raise mob.inContext(
'extract audio from file %(inputFileName)s' %vars(),
sys.exc_info())
pass
def convert(inputFileName):
try:
audioFileName = extractAudio(inputFileName)
duration = getDuration(audioFileName)
begin = 0
outputFileNames = []
while begin < duration:
end=min(duration, begin+60)
outputFileNames.append(extractAudioSegment(audioFileName, begin, end))
begin = end
pass
return outputFileNames
except:
raise mob.inContext(
'convert video file %(inputFileName)s into audio only 30 second segments' % vars(),
sys.exc_info())
pass
