rip-py: Add a split-file command

This is a backup from 2020-11-29 which added a split-file command to the
toolkit, which can be used to e.g. split DVDs of concerts into its
songs.

rip-py/rip.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 from datetime import datetime
+import itertools
 import math
 import re
 import os
@@ -78,6 +79,7 @@ def _rip_title(title, output_dir, fifo_path, device=None, media_type=None,
                   '-analyzeduration', '150M',
                   '-i', fifo_path,
                   '-map', '0:v:0', 
+                  #'-c:a', 'flac',
                   '-c:a', 'copy',
                   '-c:v', 'h264',
                   '-crf', '18',
@@ -281,5 +283,32 @@ def find_right_title(start_title, end_title, device):
         print('No title without duplicates found.')
 
 
+@cli.command('split-file')
+@click.option('-c', '--chapters-file', type=FILE_TYPE, required=True,
+    help='File with timestamps separated by comma')
+@click.option('-i', '--input-file', type=FILE_TYPE, required=True)
+@click.option('-o', '--output-dir', type=DIRECTORY_TYPE, required=True)
+def split_file(output_dir, input_file, chapters_file):
+    extension = input_file.split('.')[-1]
+
+    with open(chapters_file) as f:
+        chapters = f.read().strip().split(',')
+    
+    for i, (start, end) in enumerate(itertools.zip_longest(chapters, chapters[1:])):
+        ffmpeg_cmd = ['ffmpeg',
+                      '-ss', start]
+        if end is not None:
+            ffmpeg_cmd += ['-to', end]
+
+        ffmpeg_cmd += [
+            '-i', input_file,
+            '-c:a', 'flac',
+            #'-c:v', 'copy',
+            os.path.join(output_dir, '{}.{}'.format(i + 1, extension))
+            ]
+        #print(ffmpeg_cmd)
+        subprocess.check_call(ffmpeg_cmd)
+
+
 if __name__ == '__main__':
     cli()