[FFmpeg-devel] DVB Teletext to HLS Wbvtt Subtitles

Aman Gupta ffmpeg at tmm1.net
Mon Jan 18 21:37:28 CET 2016

ffmpeg has a webvtt encoder and decoder already. You can use this command
to convert mpeg2 closed captions into webvtt:

  ffmpeg -f lavfi -i 'movie=input.mpg[out0+subcc]' -map s out.vtt


On Mon, Jan 18, 2016 at 7:25 AM, S├ębastien Cramatte <scramatte at nixus.es>

> Hi,
> We are working on an IPTv project using FFMPEG.
> Now we stream Live TV channels  in HLS format.
> We need to add Webvtt subtitles but as fare as I known Ffmpeg doesn't
> support it yet.
> We have make some lab test using CCExtractor +  Home made Webvtt  perl
> segmenter  and it works but  we are
> unable to sync subtitles with video/audio.
> We have seen that exists some Webvtt  patch for FFMpeg but I don't know if
> this code works or not.
> Basically we need to get DVB Mpeg2 TS  subtitles track  and   output it
> as  webvtt hls   directly with FFMpeg at same time as video / audios tracks.
> We are searching to hire a guy  that can achieve this job for us.
> Regards,
> Sebastien
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