Split a file into N-minute chunks
This simple script splits a file into roughly 20 minute chunks - e.g. when a video is 21 minutes long, it does not get split into a 20 minute and a 1 minute chunk. This behaviour can be modified through the TOLERANCE variable.
It depends only on ffmpeg-python = "^0.2.0".
import ffmpeg
import os
import sys
from pprint import pprint
from datetime import timedelta
SPLIT_LENGTH = timedelta(minutes=20).total_seconds()
TOLERANCE = 1.33
probe = ffmpeg.probe(sys.argv[1])total_duration = float(probe['format']['duration'])
if total_duration < SPLIT_LENGTH * TOLERANCE:
sys.exit(1)
print(f"Total length: {timedelta(seconds=total_duration)}")
duration_left = total_duration
cnt = 0
while duration_left > 0:
start = SPLIT_LENGTH * cnt
length = SPLIT_LENGTH \
if (duration_left > SPLIT_LENGTH * TOLERANCE) else duration_left
path, ext = os.path.splitext(sys.argv[1])
out_filename = f"{path}_{cnt+1}{ext}"
print(f"CUT: {timedelta(seconds=start)} -- " +
f"{timedelta(seconds=start + length)} --> {out_filename}")
(
ffmpeg
.input(sys.argv[1], ss=start, t=length)
# .trim(start=start, duration=length)
.output(out_filename, vcodec='copy', acodec='copy')
.run()
)
cnt += 1
duration_left -= length