tweaker/compare_codecs

#!/usr/bin/python
#
# Compare a number of codecs for what they do when presented with the
# "MPEG" test suite.
#
# Outputs a table with the samples down and the codecs across, giving
# bitrate and PSNR for each target.
#
import argparse
import sys

import mpeg_settings
import encoder
import pick_codec

def ListOneTarget(rate, videofile):
  print '%-28.28s %5d ' % (videofile.basename, rate),
  for codec_name in ('h261', 'h263', 'mjpeg', 'vp8'):
    codec = pick_codec.PickCodec(codec_name)
    bestsofar = codec.BestEncoding(rate, videofile)
    assert(bestsofar.Score())
    print '%6d %4.1f' % (bestsofar.result['bitrate'], bestsofar.result['psnr']),
  print ''

def ListResults():
  print '%-28s %5s %11s %11s %11s %11s' % (
    'File', 'Rate', 'H.261', 'H.263p', 'MJPEG', 'VP8')
  for classname in mpeg_settings.files.keys():
    for filename in mpeg_settings.files[classname]:
      videofile = encoder.Videofile(filename)
      for rate in mpeg_settings.rates[classname]:
        ListOneTarget(rate, videofile)

def main():
  ListResults()
  return 0

if __name__ == '__main__':
  sys.exit(main())