mirror of
https://github.com/KrisKennaway/ii-vision.git
synced 2024-06-09 06:29:32 +00:00
f3d03a1b87
make_edit_distance - use MASKED_DOTS since it does not have a simple relationship to the HEADER_BITS/BODY_BITS for HGR - try disabling transposition distances for Damerau-Levenshtein, this may give better quality screen - introduce separate notion of MASKED_DOTS which is the number of (coloured) pixels we can extract from MASKED_BITS. For HGR this is not the same. - fix bug in _fix_array_neighbours that was not fixing headers for HGR - don't cache everything in byte_pair_differences, it's effectively unbounded. Using 1M for LRU size seems to work just as well in practise, without leaking memory. - fix bug in _diff_weights when comparing content, we want to evaluate the effect of storing content byte in each offset separately, not cumulatively. - add a consistency check function (not currently wired up) to assert that headers/footers are in sync across columns - HGR should have 16 body bits, this was causing headers not to propagate correctly to/from neighbouring column - add test case for this bug video - Use 8 random bits consistently, using 16 in some places may have introduced bias - ignore palette bit when comparing 0x00 and 0x7f in sanity check
68 lines
2.0 KiB
Python
68 lines
2.0 KiB
Python
"""Transcodes an input video file to ][-Vision format."""
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import argparse
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import movie
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import palette
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import video_mode
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parser = argparse.ArgumentParser(
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description='Transcode videos to ][-Vision format.')
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parser.add_argument(
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'input', help='Path to input video file.')
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parser.add_argument(
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'--output', default=None, help='Path to output video file.')
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parser.add_argument(
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'--max_output_mb', type=float, default=0,
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help='Maximum number of MB to output (0 = Unlimited).'
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)
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parser.add_argument(
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'--audio_normalization', type=float, default=None,
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help='Override auto-detected multiplier for audio normalization.'
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)
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parser.add_argument(
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'--every_n_video_frames', type=int, default=2,
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help='Allows skipping frames of input video to lower effective output '
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'frame rate, which may give better quality for some videos.'
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)
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parser.add_argument(
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'--video_mode', type=str, choices=video_mode.VideoMode.__members__.keys(),
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default=video_mode.VideoMode.DHGR.name,
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help='Video display mode to encode for (HGR/DHGR)'
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)
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parser.add_argument(
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'--palette', type=str, choices=palette.Palette.__members__.keys(),
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default=palette.Palette.NTSC.name,
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help='Video palette to encode for (default=NTSC)'
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)
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def main(args):
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filename = args.input
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m = movie.Movie(
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filename,
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every_n_video_frames=args.every_n_video_frames,
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audio_normalization=args.audio_normalization,
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max_bytes_out=1024. * 1024 * args.max_output_mb,
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video_mode=video_mode.VideoMode[args.video_mode],
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palette=palette.Palette[args.palette],
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)
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print("Palette %s" % args.palette)
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print("Input frame rate = %f" % m.frame_grabber.input_frame_rate)
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if args.output:
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out_filename = args.output
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else:
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# Replace suffix with .a2m
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out_filename = ".".join(filename.split(".")[:-1] + ["a2m"])
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with open(out_filename, "wb") as out:
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for bytes_out, b in enumerate(m.emit_stream(m.encode())):
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out.write(bytearray([b]))
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if __name__ == "__main__":
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main(parser.parse_args())
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