make random patterns reproducable even when no seed is given

    seed - for "exhaustive" and "random" strategies: inject seed for shuffling/choosing from array

    starting_br - for "exhaustive" and "random" strategies: start pattern with given bitrate, has to be contained in bitrates

    """

    assert strategy in ["from_array", "exhaustive", "random"]

    STRATEGIES = ["from_array", "exhaustive", "random"]

    assert strategy in STRATEGIES

    assert starting_br is None or starting_br in bitrates

    seed_str = f"_{seed}" if strategy == "random" or strategy == "exhaustive" else ""

    length_str = f"-l{length_frames}" if length_frames > 0 else ""

    fname = f"br_sw_pattern-{strategy}{seed_str}-{switch_time}{length_str}"

    # TODO: maybe calculate seed based on given parameter to automatically have reproducibility

    if seed is not None:

    brs = np.asarray(bitrates)

    # if no seed given, compute it from other parameters, so that same params => same seed

    if seed is None:

        seed = brs.sum() + STRATEGIES.index(strategy) + switch_time + length_frames

        if starting_br is not None:

            seed += starting_br

    random.seed(seed)

    if strategy == "from_array":

        brs = bitrates

    elif strategy == "exhaustive":

    if strategy == "exhaustive":

        # TODO: review, probably needs more work to be really exhaustive...

        n = len(brs) - 1

        permuts = list(permutations(bitrates, 2))