amiaopensource
Show decoded caption data in Caption viewer
I would like to have the option to view the decoded caption data in the Caption Viewer mode, rather than the raw hex values.
Hmm, I'm not sure how to get ffmpeg to do this, cc'ing @richardpl for advice.
Currently the caption values as accessible in their hexadecimal form via the metadata filter (as used at https://github.com/amiaopensource/vrecord/blob/e933bd84d62a0bd5edaa8891f6a20557c116443b/vrecord#L551) and then output to a file. Then a function processes that metadata output from those hex values into an scc (https://github.com/amiaopensource/vrecord/blob/e933bd84d62a0bd5edaa8891f6a20557c116443b/vrecord#L265-L340, this is borrowed from sccyou).
To get onscreen captions for a live input, then the output of the metadata filter would need to be sent back to ffmpeg as an additional input. I see that ffmpeg has an 608 decoder but I'm uncertain how to accept that as an input as there's no -f rawdata -c eia608 options.
You could write .scc files and use .scc demuxer from libavformat, if you instead need realtime/stream solution than its more complex.
