How to prevent Audio HANC completely on Decklink Quad?
Posted: Mon May 18, 2015 1:28 pm
Hi,
Does anyone know a way to disable SDI audio output from a Decklink Quad card?
System = DesktopVideo 10.4, SDK 10.4, DeckLink Quad, Windows 7.
Without any scheduled (pre-rolled) frames, when a DeckLink channel is started using IDeckLinkOutput::StartScheduledPlayback audio data within HANC is seen (SD PAL Video samples after #719). The same is witnessed using Blackmagic Media Express to play back an imported video file that doesn't have any audio.
IDeckLinkOutput::DisableAudio method always gives me "Access denied" wherever I've tried to use it in my code (before or after Enable video within my initialise, or after starting an output).
Also, I have tried disabling the Blackmagic audio devices within Windows Device Manager and audio ancillary data is still being output.
Thanks,
Andy
Does anyone know a way to disable SDI audio output from a Decklink Quad card?
System = DesktopVideo 10.4, SDK 10.4, DeckLink Quad, Windows 7.
Without any scheduled (pre-rolled) frames, when a DeckLink channel is started using IDeckLinkOutput::StartScheduledPlayback audio data within HANC is seen (SD PAL Video samples after #719). The same is witnessed using Blackmagic Media Express to play back an imported video file that doesn't have any audio.
IDeckLinkOutput::DisableAudio method always gives me "Access denied" wherever I've tried to use it in my code (before or after Enable video within my initialise, or after starting an output).
Also, I have tried disabling the Blackmagic audio devices within Windows Device Manager and audio ancillary data is still being output.
Thanks,
Andy