mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
34 lines
1018 B
Python
34 lines
1018 B
Python
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#!/usr/bin/env python2
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import sys, subprocess
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if len(sys.argv) > 1:
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ifile = sys.argv[1]
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encopt = sys.argv[2:-1]
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ofile = sys.argv[-1]
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else:
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print 'usage: %s <input> [encode_options] <output>' % sys.argv[0]
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sys.exit(1)
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analysis_cmd = 'ffprobe -v error -of compact=p=0:nk=1 '
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analysis_cmd += '-show_entries frame_tags=lavfi.r128.I -f lavfi '
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analysis_cmd += "amovie='%s',ebur128=metadata=1" % ifile
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try:
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probe_out = subprocess.check_output(analysis_cmd, shell=True)
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except subprocess.CalledProcessError, e:
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sys.exit(e.returncode)
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loudness = ref = -23
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for line in probe_out.splitlines():
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sline = line.rstrip()
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if sline:
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loudness = sline
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adjust = ref - float(loudness)
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if abs(adjust) < 0.0001:
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print 'No normalization needed for ' + ifile
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else:
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print "Adjust %s by %.1fdB" % (ifile, adjust)
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norm_cmd = ['ffmpeg', '-i', ifile, '-af', 'volume=%fdB' % adjust]
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norm_cmd += encopt + [ofile]
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print ' => %s' % ' '.join(norm_cmd)
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subprocess.call(norm_cmd)
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