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URGENT. capturing too many audio channels, how to I turn them off?
I am having a problem capturing with my blackmagic card. I am trying to capture from an HDCAM SR deck through SDI with embedded audio as ProResHQ. I am using the Blackmagic 1080 23.98 ProResHQ easy setup. When I capture I am being forced to capture 16 channels of audio at 24-bit 48KHz. I want to capture only one channel of audio at 16-bit 48KHZ.
Input channels in the capture tool are grayed out. I can mute them but it still captures with all 16 channels. If I open the Audio/Video settings menu and select the capture preset to edit it I have no other choices that 16 channels at 24-bit. What am I doing wrong??
I have a client waiting on me to get back to them. Thanks in advance for your help.
-Matt -
3 Replies
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Go into the Clip Settings in the Log and Capture Window and turn off all the extra channels.
This happens with the AJA Kona cards too. When you initialize the Log and Capture Window, it will activate all 16 channels if you go into an Uncompressed Capture mode.
Walter Biscardi, Jr.
Biscardi Creative Media
HD and SD Production for Broadcast and Independent Productions.STOP STARING AND START GRADING WITH APPLE COLOR Apple Color Training DVD available now!
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Thanks Walter, I did that but the clip it creates still contains all 16 tracks although there isn’t any information in the tracks I turned off. If I 2 tracks of audio in my timeline it only writes those two tracks because the other 14 channels on the clip are empty. However if I have 16 or more audio tracks in my timeline it will write in all 16 tracks although all but the first 2 are empty.
I figure out a kind of hack to get around this, if I log an offline clip it comes in with 16 channels, but I can modify the offline clip to have 2 channels then capture. However this doesn’t solve the problem on hard captures. Also I still have no way to capture as 16-bit instead of 24-bit. I talked to blackmagic and they say it may be built into the driver this way, still waiting to hear back from them…
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Have the same issue. I am capturing thru a Kona 3 card off a SR deck.
I go to modify > clip settings and change my tracks. Then to Log & Capture to silence the remaining tracks.
Each time it digitizes in all 16 tracks, unless I modify it to 0 audio tracks.It is fine if I leave them in the same project, but I am sending the footage out to another Post house. When they import the footage it comes across with 16 tracks.
The only way I can get rid of this is to open the clips up from the capture scratch and view them in Quick Time, press apple + j and delete the erroneous tracks.
I have contacted Kona and they said they receive a lot of calls about this issue. The guy I spoke with seems to think it is a FCP issue. I have emailed apple and have yet to hear a response.
This is a huge time killer having to adjust all the tracks, any help would be greatly appreciated.
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