[FFmpeg-user] DeckLink Output Controls
Thomas.Matthias at dolby.com
Fri Oct 7 20:25:10 EEST 2016
I’m looking into using FFMPEG for its DeckLink device control. The capture part of the API seems fairly fully featured, however the output/playback controls seems to have some strange limitations. Specifically, on output, there is a hard-coded limit of only 8 channels of audio. What’s strange, is that the capture partition can handle up to 16, which makes sense considering most DeckLink cards have SDI input/output, and 16 channels is a standard workflow for SDI. Also, is there a reason why only 2 and 8 channels are supported, instead of just “n” channels (4 or 6 channels, for example)?
Would it be possible to output 16 channels of audio? Is there a better way to do this (via the command line?)? Could a custom version of the decklink_enc files be built to handle 16 channels or is there some other limitation I’m not aware of?
Thanks in advance, I really appreciate any advice/ideas here. Also, is there a specific reason that input/output are limited to only 48khz for audio? I’m guessing this is specific to DeckLink cards, but I haven’t found a specific reason yet.
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