FFMpeg Copy Live Stream (Limit to 60s file)

Question

I currently have a working way to get a live stream and start downloading it locally while it is still live.

ffmpeg -i source_hls.m3u8 -c copy output.mkv -y

Answer 1

Late answer, but you can use -t duration, i.e.:

ffmpeg -y -t 60 -i source_hls.m3u8 -c copy output.mkv

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From ffmpeg docs:

-t duration (input/output)

When used as an input option (before -i), limit the duration of data read from the input file.

When used as an output option (before an output url), stop writing the output after its duration reaches duration.

duration must be a time duration specification, see (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual.

-to and -t are mutually exclusive and -t has priority.

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-t argument examples:

• 55 - 55 seconds
• 12:03:45 - 12 hours, 03 minutes and 45 seconds
• 23.189 - 23.189 seconds