-
decklink hd pro drops frames capturing uncompressed HD 1080 25p (Windows)
Hi there!
We are newbies with Decklink cards and we are trying to capture uncompressed HD 1080 25p material with our decklink card hd pro dual link. Using the decklink capture tool the process is always aborted after 10 seconds because of dropped frames. The Quicktime compression is set to ‘none’. What in my eyes means uncompressed. Using one of the BM codecs the capture process is working fine.
At first there is one genaral question: When Blackmagic Design is talking about uncompressed HD video, are they talking about their BM HD Codecs or are they talking about setting the compression in quicktime or AVI to ‘none’?
Is the Decklink card able to capture HD video uncompressed or is it ‘only’ able to capture with BMs ‘uncompressed’ codecs?Here our hardware:
-BM Decklink HD pro dual link [v. 5.3.1.]
-HP xw8200(2x XEON 3.4, 2 GB RAM)
-Nvidia QFX1300
-2 striped Huge U-320-R on ATTOs UL4D [v2.11] (DL Disk speed values are 271 MB/s reading and 245MB/s writing)
-Windows XP SP2.We use the Decklink in the 100MHz slot.
Having the Decklink in the 133MHz slot and the SCSI card in the 100MHz results in less frames per seconds executing the DL drive speed test. But the results for 1080 10Bit YUV are still 53 FpS and it still aborts capturing after 10 seconds of 1080 25p uncompressed video.The other question I have is about the downconversion of HD. Is it possible to capture HD video over the HD-SDI input and get a downconverted SD-SDI signal on the SD-SDI output at the same time. I heard it only works on MAC. Is that right?
Perhaps you have some answers and solutions.
Thanks in advance!Sascha
-
1 Reply
-
None codec is apple 8 bit RGB codec – it is not binary compatibile with BMD codec’s so your computer will do a conversion – but only as much you can fit into ram after that it drpos frame
You should use blackmagic RGB codec for RGB 10bit captures other than that you should be OK
-Kaspar
Reply to this Discussion! Login or Sign Up