[Python] How to segment and transcribe an audio from a video into timestamped segments?

I want to segment a video transcript into chapters based on the content of each line of speech. The transcript would be used to generate a series of start and end timestamps for each chapter. This is similar to how YouTube now "auto-chapters" videos.

Example .srt transcript:

...

70
00:02:53,640 --> 00:02:54,760
All right, coming in at number five,

71
00:02:54,760 --> 00:02:57,640
we have another habit that saves me around 15 minutes a day
...


I have had minimal luck doing this with ChatGPT as it finds it difficult to both segment by topic and recollect start and end timestamps accurately. I am now exploring whether there are other options for doing this.

I know topic modeling based on time series is possible with some python libraries. I have also read about text tiling as another option. What options are there for achieving an outcome like this?

Note: The format above (.srt) is not necessary. It's just the idea that the input is a list of text-content with start and end timestamps.

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