> > He mentioned a53cc, which appears as a flag to libx264 ("-a53cc true") and >> enables ... something. I've given it a brief look, but couldn't figure how >> it's supposed to work. I was hoping someone might have experience with it, >> because it must have a reason for it to be in the code. >> > According to FFmpeg documentation:
a53cc boolean Import closed captions (which must be ATSC compatible format) into output. Only the mpeg2 and h264 decoders provide these. Default is 0 (off). This is one of the options for the x264 encoder, which has to be used with the "-x264opts" parameter. According to the above description, this filters is meant for source MPG-2 or H.264 content which already have A/53 Closed Captions embedded, and it will pass them on to the destination x264 file. Here is an example: ffmpeg -i INPUT.mpg -c:v libx264 -x264opts keyint=123:min-keyint=20:a53cc=1 -an -f mpegts OUTPUT.ts I haven't tried this command myself, but AFAIK this is the only support FFmpeg currently has for Closed Captions. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".