ii-vision/transcoder/main.py

58 lines
1.7 KiB
Python

"""Transcodes an input video file to ][Vision format."""
import argparse
import movie
import video
parser = argparse.ArgumentParser(
description='Transcode videos to ][Vision format.')
parser.add_argument(
'input', help='Path to input video file.')
parser.add_argument(
'--output', default=None, help='Path to output video file.')
parser.add_argument(
'--max_output_mb', type=float, default=0,
help='Maximum number of MB to output (0 = Unlimited).'
)
parser.add_argument(
'--audio_normalization', type=float, default=None,
help='Override auto-detected multiplier for audio normalization.'
)
parser.add_argument(
'--every_n_video_frames', type=int, default=2,
help='Allows skipping frames of input video to lower effective output '
'frame rate, which may give better quality for some videos.'
)
parser.add_argument(
'--video_mode', type=str, choices=video.Mode.__members__.keys(),
help='Video display mode to encode for (HGR/DHGR)'
)
def main(args):
filename = args.input
m = movie.Movie(
filename,
every_n_video_frames=args.every_n_video_frames,
audio_normalization=args.audio_normalization,
max_bytes_out=1024. * 1024 * args.max_output_mb,
video_mode=video.Mode[args.video_mode]
)
print("Input frame rate = %f" % m.video.input_frame_rate)
if args.output:
out_filename = args.output
else:
# Replace suffix with .a2m
out_filename = ".".join(filename.split(".")[:-1] + ["a2m"])
with open(out_filename, "wb") as out:
for bytes_out, b in enumerate(m.emit_stream(m.encode())):
out.write(bytearray([b]))
if __name__ == "__main__":
main(parser.parse_args())