How do you extract closed captions from the ts file after copying from mkv file with ffmpeg?

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1

From other threads:
“Extract the TS from the MKV. You can use ffmpeg for this.
ffmpeg -i input.mkv -vcodec copy output.ts
Now you can extract closed caption from the TS file. You may use ffmpeg or ccextractor for this.”
I did that first step.
On the second step, with ccextractor it hangs up on some of them so I want to try ffmpeg but I do not know how to extract with this.

2

here’s what I found on stack overflow:
ffmpeg -f lavfi -i “movie=test.ts[out0+subcc]” -map s output.srt

this will only work for USA CC