Add multithreading

[joshinils]

I've noticed that the loop Getting silent intervals to cut at

jumpcutter/jumpcutter/clip.py

Lines 108 to 128 in 92f1894

	for i, values in tqdm(
	enumerate(absolute_signal),
	desc="Getting silent intervals to cut",
	total=len(absolute_signal),
	):
	silence = all([value < magnitude_threshold for value in values])
	silence_counter += silence
	failure_counter += not silence
	if failure_counter >= failure_tolerance:
	if silence_counter >= duration_threshold:
	interval_end = (i - failure_counter) / self.fps
	interval_start = interval_end - (silence_counter / self.fps)
	interval_start += space_on_edges
	interval_end -= space_on_edges
	intervals_to_cut.append(
	(abs(interval_start), interval_end)
	) # in seconds
	silence_counter = 0
	failure_counter = 0

Only uses one thread.

The same goes for Cutting silent intervals:

jumpcutter/jumpcutter/clip.py

Lines 52 to 65 in 92f1894

	for start, stop in tqdm(intervals_to_cut, desc="Cutting silent intervals"):
	clip_before = self.clip.subclip(previous_stop, start)
	if clip_before.duration > self.min_loud_part_duration:
	jumpcutted_clips.append(clip_before)
	if self.silence_part_speed is not None:
	silence_clip = self.clip.subclip(start, stop)
	silence_clip = speedx(
	silence_clip, self.silence_part_speed
	).without_audio()
	jumpcutted_clips.append(silence_clip)
	previous_stop = stop

That also only uses one thread.