0

I have built ffmpeg with decklink support, it plays my mpg file fine out the SDI but not seeing any captions on my works broadcast monitor (JVC DT-V17G1Z). This monitor shows captions on SDI from my Mojito card but trying to get it to work with a BlackMagic 4k extreme. The mpg file has embedded 608 and 708 captions. Using the to play-

ffmpeg -i C:\video\RD2838_720p.mpg -f decklink -pix_fmt uyvy422 "DeckLink 4K Extreme"

MediaInfo on captinos:

Text #1

ID : 4096 (0x1000)-CC1 Menu ID : 1 (0x1) Format : EIA-608 Muxing mode : A/53 / DTVCC Transport Muxing mode, more info : Muxed in Video #1 Duration : 28 min 30 s Bit rate mode : Constant Stream size : 0.00 Byte (0%) Language : English CaptionServiceName : CC1

Text #2 ID : 4096 (0x1000)-1 Menu ID : 1 (0x1) Format : EIA-708 Muxing mode : A/53 / DTVCC Transport Muxing mode, more info : Muxed in Video #1 Duration : 28 min 30 s Bit rate mode : Constant Stream size : 0.00 Byte (0%) Language : English

How do I get the Decklink 4k to pass the captions? Thanks!

Daniel A. White
  • 187,200
  • 47
  • 362
  • 445
asperi
  • 19
  • 1
  • Did this but still not working.. ffmpeg -i C:\video\RD2838_720p.mpg -f decklink -teletext_lines all -vcodec v210 "DeckLink 4K Extreme" – asperi Nov 27 '21 at 18:07
  • Was mistaken, needing EIA-708 and EIA-608 (north America) and not DVB/Teletext stream (euro)... I believe I need lavfi, subcc and/ or -a53cc.. Was able to extract captions from my file to SRT with this but looking to just pass them out SDI.. ffmpeg -f lavfi -i "movie=RD2838_720p.ts[out0+subcc]" -map s output.srt – asperi Nov 28 '21 at 19:42

0 Answers0