Request for video file experts

How easy would it be to edit a TS file to exclude the parts that are 16:9?

I have a bad habit of watching old series recorded off-air, and of course the adverts are wide screen while the parts I want to watch are 4:3.

It sounds like something that could be whipped up fairly quickly as a command line program by someone who knows ffmpeg or similar, maybe even just a bash script?

If it just outputs the start and end timestamps, I can probably work with that, too.

I have a bad habit of watching old series recorded off-air,

Another person who watches Talking Pictures?

When the adverts come, I simply swipe right a few times ¹ until they’re gone. Or take it as a good opportunity to go out the kettle on.

¹ Or ^Right, etc

I know, and I can hit the end of the ads 90% of the time, it’s just a waste of time. Automation is good!

(4Extra, actually, for this series, but I did enjoy a few episodes of Dixon of Dock Green.)

but I did enjoy a few episodes of Dixon of Dock Green

I remember enjoying them when they were first shown!

Me too, but I realise now that I didn’t understand them.