[FFmpeg-user] How to add EIA-608/EIA-708 Closed Caption from a srt file

[loeffler at eyetrap.net]

Hello,

I am relatively new to ffmpeg and I am tasked with encoding H264 Video  
into an MPEG-2 Transport Stream. That video part I managed to get  
right. Now I need to also add Closed Caption to it in EIA-608/EIA-708  
format. I have a separate .srt file but I am unable to identify the  
correct commands to use.

Thanks for your help
Markus