On Tue, Jun 6, 2017 at 4:40 PM Kieran Kunhya <kier...@obe.tv> wrote: > > > > The cc_count is only 5 bits, which mean that only 31 3-byte "closed > caption > > constructs" will fit in a "block". Testing this with 1080i60 > material, I > > found that 2 or 3 blocks was often necessary to hold all of the CC data. > > > > I tried ignoring that limit of 31 "constructs" per block, and ended up > with > > corrupt captions. By preserving the 2 or 3 separate blocks I observed > > from the original source, the captions are perfect. > > > > Odd, ATSC specifies specific bitrate requirements in this area. Are you > sure your insertion process isn't bursting? > > Kieran >
The source is SDI with embedded 708 captions. I supposed there may be an issue there. I have not tried this with any other source. John _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
