[FFmpeg-user] DeckLink Duo 2 duplex_mode doesn't work

Marton Balint cus at passwd.hu
Wed Aug 7 23:03:04 EEST 2019

On Wed, 7 Aug 2019, Rik Roukens wrote:

> Thanks for your reply Marton,
>> Probably this can be worked around from software, so ffmpeg could be
> smart
>> enough to enable half duplex mode even if the specified input is the
>> "slave" connector.
> I agree, it feels like it should set the duplex mode by default when you
> choose to output on DeckLink Duo (3) or (4).
>> In any case, there is also the option of specifying the default duplex
>> mode (and saving it) with the control panel application, or its linux
>> counterpart. I believe in that case the duplex mode should simply work,
>> because that becomes the default mode...
> Thanks, I've considered installing a GUI just for that purpose, but I'd
> really like to avoid that. If you have any good suggestion how to do the
> above without installing ubuntu desktop, your advice is very welcome :)

Every setting is stored in /etc/blackmagic/BlackmagicPreferences.xml, 
changing duplex mode there and rebooting (or maybe simply restarting the 
helper daemon?) should probably do the trick.


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