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DVCPro HD issue – cross-posted to Decklink Forum
I’m working from a 24p DVCpro HD timeline with eight track of audio, displaying to a SD broadcast monitor via a Blackmagic Extreme card. Media is on 4-drive SATA raid with 20% drive space remaining with 160mb/s throughput.
Although drive throughput is diminished because raid is 80% full, everything seems to be working fine. However, when I play in reverse and hit stop, things get bad. First, there’s a long pause during which the video continues to play, then I get the spinning beachball, and about 33% of the time FCP then crashes. None of this happens when working with a longer and more complex 10-bit timeline on the same system.
I’ve trashed prefs, run Disk Warrior on all drives, repaired permissions, and even tried copying the timeline to a new project. This changes nothing. Anyone got any ideas? I’m beginning to think its the blackmagic card, which must play out a 24p timeline at 29.97 in my configuration. Does this sound logical?
THNX,
DRW -
2 Replies
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From what you described, this is probably a Decklink or Decklink driver issue. Definately not the disk drives. But you should do as much troubleshooting as possible to narrow it down. For example, the fact that it works with Uncompressed footage shows that your disks are not the culprit. Narrow down the problem and then call BMD support. The key fact to make clear is that the problem only occurs when the Decklink output is on. That makes it an issue with their product- not Apple’s.
Sean
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Thanks so much Sean,
You helped me big time by giving me a simple idea. I completely turned off the External Video and tried like heck to crash FCP. Nothing I could do would make it crash. So, now I know the problem lies somewhere on the Blackmagic side of things. Even though its Sunday, Kristian over at Blackmagic has already answered my post, and now with your help it looks like I can give them more definitive info to help them figure out what exactly is causing the issue.
BTW, an insider at the place where you and I get our SATA enclosures advised me to avoid the brand of hard drives you and I discussed last week until certain issues are resolved.
Thanks again…
DRW
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