On Wed, Nov 20, 2019 at 08:43:00 -0600, Steven Kan wrote: > > https://trac.ffmpeg.org/ticket/1778#comment:10 > > <https://trac.ffmpeg.org/ticket/1778#comment:10> >
> If I’m demuxing your answer correctly, the answer is “no,” at least > of now. Thank for your reply; at least now I won’t spend hours trying > to find a solution that doesn’t exist! That enhancement request has > had no updates for 2 years :-( Indeed, that's the conclusion. :-/ > I did find this libcaption project: > https://github.com/szatmary/libcaption > <https://github.com/szatmary/libcaption> I had found that as well before I answered. I looked into it again, and saw the nice examples: https://github.com/szatmary/libcaption/tree/develop/examples The add_captions scripts shows how to use the example binaries: https://github.com/szatmary/libcaption/blob/develop/examples/add_captions as such: $ ffmpeg -i $VIDEO -codec copy -f flv - | flv+srt - $SRT - | ffmpeg -i - -codec copy -y $OUTFILE flv+srt even supports dynamic subtitles: flv+srt is capable of reading an srt from a named pipe for the use in live captioning. The input must still be formatted as an srt. If a null character is received on the pipe The internal srt buffer is cleared. In this case the first srt timestamps after the null is assumed to be immediate, and captions begins with this text on the next frame. Nifty, huh? > and this page saying that the captions can be pushed via RTMP: > https://ghuntley.com/notes/closed-captioning/ > <https://ghuntley.com/notes/closed-captioning/> > I know this is somewhat OT for ffmpeg, but can I push two RTMP streams to > YouTube, one for the a/v, and one for the captions? As far as I understand YouTube's docs, these methods are not supported. > Back on-topic, given that libcaption exists, how difficult a task > would it be to integrate support into ffmpeg? Is it just a matter of > re-muxing the output from libcaption into the ffmpeg output stream? > I’m not programmer, unfortunately, but I’m just trying to get a sense > for the scope of the problem. It has an MIT license, so its code - or just the relevant parts, as some of the code deals with demuxing/muxing (and with filtering streams?) - could even be integrated into ffmpeg. Cheers, Moritz _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
