[FFmpeg-devel] [PATCH] decklink: support all valid numbers of audio channels

Dave Rice dave at dericed.com
Tue Jan 5 16:45:47 CET 2016

> On Jan 5, 2016, at 10:38 AM, Matthias Hunstock <atze at fem.tu-ilmenau.de> wrote:
> Am 20.12.2015 um 12:57 schrieb Matthias Hunstock:
>> As it is already written in the documentation, BMD DeckLink cards
>> are capable of capturing 2, 8 or 16 audio channels (for SDI Inputs).
>> Currently the value is hardcoded to 2. Introduces new option.
> Any more opinions on this?

I suggest adding options for one 2, 8, or 16 channel stream. Documentation could add examples of how to do mapping within a filterchain with that input.

> I'd like to add several options to make the decklink support more
> feature complete, since it is very widespread hardware. But I can save
> some effort if it is not accepted anyway.
> Things on my personal roadmap:
> - change order of streams (currently :0 is audio and :1 is video)

+1. Also it may be possible to add caption (c608) and timecode streams.

> - introduce options to select video and audio input, e.g. the new
> low-cost cards have SDI and HDMI inputs

I have a BlackMagic UltraStudio which adds Composite and Component inputs. Happy to test patches.

> - port those changes to decklink output code
> - more stuff I don't remember right now


Dave Rice

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