On 10/7/15 1:40 PM, Florian Hesse wrote:
Are you sure its a problem by the driver? The Blackmagic productpage says VANC is supported and as far as i know they developed the drivers? There just seems to be a problem with some lines below the SDI switching points https://forum.blackmagicdesign.com/viewtopic.php?f=12&t=32029 Do you know if it works with dectek-cards and drivers?
I'm not sure if you are asking me or someone else, but I'll do my best to answer.
VANC is just a means by which Ancillary data can be sent in a SDI stream. That data can be all kinds of things, including audio, closed captioning, camera control, or private data between devices. The Blackmagik Decklink drivers support the capture and play of this data.
The ffmpeg decklink driver sends no VANC data, makes no connections to a subtitle stream, and does not support 10bit YUV which using the VANC requires. It is not really a "problem", in that support has never been added. Not a bug, but a design choice.
The choice of outgoing VANC lines for CC does not mater much. It only maters if you are capturing VANC and some other device is putting it on one of those lines mentioned in your link in which case it sounds like you would need the Decklink Extreme card. Do you know what line your device is putting the VANC on?
Deron _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
