Support single-stream TS files without specifying PID or SID

[craftbyte]

Feature to be added

Allow running without the --sid or --pid option if there is only one stream in the TS file.

What problem is the feature trying to resolve?

I am trying to extract teletext from IP TV streams. Each stream only has one channel on it, not more. While most channels have SID 1, some preserve the SID from the DTT broadcast that is being converted to IPTV. This makes it hard to add new channels to an automated pipeline, since I first need to run --list-services on it to get the SID.

[orryverducci]

Thanks for the suggestion. I agree this would be useful.