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Add option for padding around cuts #12

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Add option for padding around cuts #12

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26 changes: 18 additions & 8 deletions silence_cutter.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@
logger.addHandler(log_handler)


def findSilences(filename, dB = -35):
def findSilences(filename, dB = -35, padding = 0.025):
"""
returns a list:
even elements (0,2,4, ...) denote silence start time
Expand All @@ -27,6 +27,7 @@ def findSilences(filename, dB = -35):
logging.debug(f"findSilences ()")
logging.debug(f" - filename = {filename}")
logging.debug(f" - dB = {dB}")
logging.debug(f" - padding = {padding}")

command = ["ffmpeg","-i",filename,
"-af","silencedetect=n=" + str (dB) + "dB:d=1",
Expand All @@ -43,9 +44,9 @@ def findSilences(filename, dB = -35):
logging.debug(" words: " + str(words))
for i in range (len(words)):
if ("silence_start" in words[i]):
time_list.append (float(words[i+1]))
time_list.append (float(words[i+1]) + padding)
if "silence_end" in words[i]:
time_list.append (float (words[i+1]))
time_list.append (float (words[i+1]) - padding)
silence_section_list = list (zip(*[iter(time_list)]*2))

#return silence_section_list
Expand Down Expand Up @@ -123,14 +124,15 @@ def ffmpeg_run (file, videoFilter, audioFilter, outfile):



def cut_silences(infile, outfile, dB = -35):
def cut_silences(infile, outfile, dB = -35, padding = 0.025):
logging.debug(f"cut_silences ()")
logging.debug(f" - infile = {infile}")
logging.debug(f" - outfile = {outfile}")
logging.debug(f" - dB = {dB}")
logging.debug(f" - padding = {padding}")

print ("detecting silences")
silences = findSilences (infile,dB)
silences = findSilences (infile,dB,padding)
duration = getVideoDuration (infile)
videoSegments = getSectionsOfNewVideo (silences, duration)

Expand All @@ -142,7 +144,7 @@ def cut_silences(infile, outfile, dB = -35):

def printHelp():
print ("Usage:")
print (" silence_cutter.py [infile] [optional: outfile] [optional: dB]")
print (" silence_cutter.py [infile] [optional: outfile] [optional: dB] [optional: padding]")
print (" ")
print (" [outfile]")
print (" Default: [infile]_cut")
Expand All @@ -157,6 +159,10 @@ def printHelp():
print (" -50: Cuts are almost not recognizable.")
print (" Cuts nothing, if there is background noise.")
print (" ")
print (" [padding]")
print (" Default: 0.025")
print (" How much time to pad around each cut")
print (" ")
print ("")
print ("Dependencies:")
print (" ffmpeg")
Expand All @@ -183,15 +189,19 @@ def main():
tmp = os.path.splitext (infile)
outfile = tmp[0] + "_cut" + tmp[1]
dB = -30
padding = 0.025

if (len(args) >= 2):
outfile = args[1]

if (len(args) >= 3):
dB = args[2]
dB = int(args[2])

if (len(args) >= 4):
padding = float(args[3])


cut_silences (infile, outfile, dB)
cut_silences (infile, outfile, dB, padding)


if __name__ == "__main__":
Expand Down