[FFmpeg-user] Export Subtitles live from HD-SDI

florian.hesse at rbb-online.de florian.hesse at rbb-online.de
Wed Oct 7 15:05:33 CEST 2015

Hello everyone,

i'm working on a project where we want to livestream one TV-Program with 
MPEG-DASH. There for we need seperate subtitles. The encoder gets the 
signal over HD-SDI wich supports embedded subtitles in Teletext with SMPTE 
Our capturecard will be a Blackmagic Decklink Duo wich supports VANC-Data. 

I know that ffmpeg can extract closed captions from files. But what about 
Livesignals like from SDI-Signals?
Thank you,

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