DaVinci Resolve 18でゆっくり動画っぽいものをPythonで効率的に作ろうとしたけど断念した話

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def FRAME_VALUE(time_unit : str) -> int:
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    if type(time_unit) != str:
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        raise TypeError("time_unit must be str.")
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    return_value = 0
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    FRAME_OF_SEC = 30
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    FRAME_OF_MINUTE = FRAME_OF_SEC * 60
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    FRAME_OF_HOUR = FRAME_OF_MINUTE * 60
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    if time_unit == "sec":
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        return_value = FRAME_OF_SEC
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    elif time_unit == "minute":
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        return_value = FRAME_OF_MINUTE
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    elif time_unit == "hour":
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        return_value = FRAME_OF_HOUR
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    else:
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        raise ValueError("time_unit must be 'sec', 'minute' or 'hour'.")
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    return return_value
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def timecode_to_frame(timecode : str, start_frame : int = 0) -> int:
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    COLON = ":"
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    if type(timecode) != str:
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        raise TypeError("timecode must be str.")
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    if type(start_frame) != int:
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        raise TypeError("start_frame must be int.")
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    if COLON not in timecode:
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        raise TypeError("timecode must contain colon.")
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    time_list = timecode.split(COLON)
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    if len(time_list) != 4:
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        raise TypeError("timecode must be \"hour : minute : second : frame\".")
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    frame = sum([int(time_list[0]) * FRAME_VALUE("hour")
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        , int(time_list[1]) * FRAME_VALUE("minute")
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        , int(time_list[2]) * FRAME_VALUE("sec")
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        , int(time_list[3])
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    ])
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    frame = frame + start_frame
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    return frame
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for i in range(0, len(clips_added), 1):
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    tmp_duration = clips_added[i].GetClipProperty()["Duration"]
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    if i == 0:
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        current_timeline.SetCurrentTimecode('01:18:29:13')
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    if i == 1:
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        current_timeline.SetCurrentTimecode('01:18:33:13')
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    start_frame = 1000
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    end_frame = start_frame + timecode_to_frame(tmp_duration)
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    print_log(tmp_duration)
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    print_log(end_frame)
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    media_pool.AppendToTimeline([{
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        "mediaPoolItem": clips_added[i]
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        , "startFrame": start_frame
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        , "endFrame": end_frame
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    }])