z8
56 lines
1.6 KiB
Python
56 lines
1.6 KiB
Python
from caf import CAF
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# Note:
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# The mdat chunk can also be loaded from the
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# input file directly by using get_box_data_by_path()
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# and specifying "mdat" as the path
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# Example data
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input_file_name = "input.mp4"
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sample_rate = 44100
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bit_depth = 16
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total_duration = 1206787933
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sample_sizes = [
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5756, 5811, 5724, 5757, 5721, 5694, 5629, 5916,
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5682, 5697, 5675, 5937, 5914, 5899, 5723, 5948,
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5799, 5780, 5639, 5810, 5826, 5789, 5550, 5468,
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5371, 5476, 5699, 6783, 6406, 6284, 6149, 5696,
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5808, 5441, 5685, 5765, 6057, 5817, 5999, 6532,
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5784, 5562, 5495, 5936, 5849, 6581, 7660, 7961,
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7745, 7576, 8637, 8983, 7434, 6829, 7058, 8073,
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8050, 7178, 7103, 7683, 8523, 8708, 8712, 8730,
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8874, 8882, 8383, 8016, 8091, 7575, 8164, 7426,
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7186, 7247, 7970, 7773, 7454, 7324, 7216, 7366
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]
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# Example 1
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# Without old magic cookie
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c = CAF()
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with open("mdat.dat", "rb") as f:
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c.load_mdat_data(bytearray(f.read()))
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c.sample_rate = sample_rate
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c.bit_depth = 16
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c.number_of_valid_frames = total_duration
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c.number_of_packets = len(sample_sizes)
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c.sample_sizes = sample_sizes
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c.create_file()
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c.write("output.caf")
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# Example 2
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# With magic old cookie
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c = CAF()
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with open("mdat.dat", "rb") as f:
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c.load_mdat_data(bytearray(f.read()))
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with open(input_file_name, "rb") as f:
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c.load_input_data(bytearray(f.read()))
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c.old_cookie = True
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c.load_magic_cookie()
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c.bit_depth = 16
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c.number_of_valid_frames = total_duration
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c.number_of_packets = len(sample_sizes)
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c.sample_sizes = sample_sizes
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c.create_file()
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c.write("output.caf")
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