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1. FFMPEG MAP CLOSED CAPTIONS HOW TO
2. FFMPEG MAP CLOSED CAPTIONS PDF
3. FFMPEG MAP CLOSED CAPTIONS CODE

muxrate VBR, pcr every 5 pkts, sdt every 200, pat/pmt every 40 pkts Muxrate VBR, pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts Estimating duration from bitrate, this may be inaccurate

FFMPEG MAP CLOSED CAPTIONS CODE

They have the source code on their website, I've included the link.

FFMPEG MAP CLOSED CAPTIONS HOW TO

There is another open source project that seems to have figured out how to pull this CC data from video. They are larger than the 10MB requested so I've hosted them on my site, here are the direct links. Here are the files produced from the below command.

FFMPEG MAP CLOSED CAPTIONS PDF

This PDF give more details regarding how this method of CC works: I'm capturing live video from the gige port of a Motorola DSR-6100 IRD that is putting out UDP multicast TS. If you use '-c:v copy' the CC remains intact. This type of CC is referred to as EIA-608/EIA-708 and is muxed to the video stream following guidelines in SCTE 128 from my research. When transoding/reencoding video ffmepg loses the CC data that was embedded within the actual video stream itself.