mirror of
https://github.com/KrisKennaway/ii-vision.git
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ec65684221
- Extract out a (File)FrameSequencer class from Video to encapsulate the generation of still frames. This also makes Video easier to test. - Fix FileFrameSequencer.frames() to correctly handle filenames containing '.' - Temporarily switch to the BMP2DHR NTSC palette (#5) for evaluation. Video: - Temporarily hardcode DHGR decoding - Optimize _heapify_priorities() by using numpy to vectorize the construction of the list of tuples. This requires changing the random nonce to an int so the intermediate array has a uniform type. - Use the efficient 28-bit representation of DHGR (aux, main, aux, main) tuples introduced in DHGRBitmap to evaluate diffs - Switch to np.int type for accumulating diffs, and random.randint(0, 10000) instead of float for nonce values. - Fix/improve some of the error evaluation in _index_changes: - skip offsets whose diffs have already been cleared - hoist some stuff out of _compute_error into the parent - Add some validation that when we run out of work to do with a frame, the source and target memory maps should be equal. This isn't happening sometimes, i.e. there is a bug.
58 lines
1.7 KiB
Python
58 lines
1.7 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 video
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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.__members__.keys(),
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help='Video display mode to encode for (HGR/DHGR)'
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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[args.video_mode]
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)
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print("Input frame rate = %f" % m.frame_sequencer.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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