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#!/usr/bin/env python3
"""
Extract audio from a FLV movie
Author: Victor Stinner
Creation date: 2006-11-06
"""
from hachoir.parser import createParser
from hachoir.stream import FileOutputStream
from hachoir.parser.video.flv import AUDIO_CODEC_MP3
from sys import stderr, exit, argv
def main():
if len(argv) != 2:
print("usage: %s video.flv" % argv[0], file=stderr)
exit(1)
# Open input video
inputname = argv[1]
parser = createParser(inputname)
if parser["audio[0]/codec"].value != AUDIO_CODEC_MP3:
print("Unknown audio codec: %s" %
parser["audio[0]/codec"].display, file=stderr)
# Extract audio
print("Extractor audio from: %s" % inputname)
outputname = inputname + ".mp3"
output = FileOutputStream(outputname)
for chunk in parser.array("audio"):
data = chunk["music_data"]
output.copyBitsFrom(
data.parent.stream, data.absolute_address, data.size, data.parent.endian)
print("Write audio into: %s" % outputname)
main()
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