An .srt file which has been grepped for all instances of "chapter" do we can find the start points of each chapter in one monolithic audiobook file. As discussed at https://www.blisshq.com/music-library-management-blog/2021/01/22/splitting-audiobooks-chapters-ai/

Fantastic Mr Fox-chapters.srt

00:00:33,150 --> 00:00:35,490
chapter one the three farmers

4
00:00:37,770 --> 00:00:39,120
down in the valley there were three
--
00:02:30,600 --> 00:02:32,910
chapter two mr fox

48
00:02:35,100 --> 00:02:37,380
on a hill above the valley there
--
00:05:36,600 --> 00:05:37,410
chapter three

115
00:05:38,190 --> 00:05:38,820
the shooting
--
00:11:24,425 --> 00:11:27,425
chapter four the terrible shovels

252
00:11:29,285 --> 00:11:31,475
down in the whole mrs fox was
--
00:16:06,335 --> 00:16:09,215
chapter five the terrible tractors

360
00:16:11,315 --> 00:16:13,085
as the sun rose the next morning
--
00:20:41,040 --> 00:20:41,880
chapter six

458
00:20:42,660 --> 00:20:43,260
the race
--
00:23:12,990 --> 00:23:13,800
chapter seven

520
00:23:14,760 --> 00:23:15,990
will never let him go
--
00:25:51,120 --> 00:25:54,660
chapter a's the foxes begin to starve

576
00:25:56,520 --> 00:25:58,950
that evening three tens were put up
--
00:29:59,670 --> 00:30:00,450
chapter nine

671
00:30:01,380 --> 00:30:03,090
mr fox has a plan
--
00:33:31,520 --> 00:33:32,270
chapter ten

756
00:33:33,320 --> 00:33:35,270
bogus as chicken house number one
--
00:38:45,950 --> 00:38:49,010
chapter eleven a surprise for mrs fox

876
00:38:51,320 --> 00:38:53,150
the small fox ran back along the
--
00:40:48,915 --> 00:40:49,875
chapter twelve

920
00:40:50,865 --> 00:40:51,375
badger
--
00:45:35,025 --> 00:45:36,015
chapter thirteen

1032
00:45:36,825 --> 00:45:39,045
sponsors giant storehouse
--
00:52:45,425 --> 00:52:48,665
chapter fourteen badger had doubts

1187
00:52:50,525 --> 00:52:53,375
just one more visit cried mr fox
--
00:56:26,285 --> 00:56:29,705
chapter fifteen been secret side or seller

1262
00:56:31,805 --> 00:56:34,025
mr fox examined the wall carefully
--
01:02:18,335 --> 01:02:19,475
chapter sixteen

1389
01:02:20,165 --> 01:02:20,855
the woman
--
01:06:49,475 --> 01:06:50,555
chapter seventeen

1496
01:06:51,215 --> 01:06:52,235
the great feast
--
01:13:56,870 --> 01:13:58,070
chapter eighteen

1650
01:13:58,850 --> 01:14:00,440
still waiting