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Audio Lag…HELP!
Hello:
I am trying to digitize some footage on an PC Avid Xpress Meridian System (5.5) in 15:1s onto some scsi’s (just for space)…I’m then moving the media via firewire to a Mac Avid Xpress Pro system Powerbook G4 2 gigs RAM. I’ve tried leaving the media on the firewire and placing it on the hard drive of the laptop, and while the media shows up fine, after playing clips for a moment or two i start to get a severe audio lag…not sure what this is about? I dig on PC’s and move to the mac all the time in 15:1 and it works great, but i’ve never done it with a meridian system…fyi i am using 48000 audio also…can anyone help me out with this?
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8 Replies
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I’ve determined that its actually the video lagging behind the audio…in addition i’ve since plugged the drive into an xp system and everything was fine there, i then redigitized some footage, moved it to my mac system, and the same problem occurs. So it clearly doesn’t have anything to do with the older PC WIN2000 system…Other projects on my Mac system that have been diged on PC are fine. So it is obviously some small setting I’m missing, but i’m racking my brain here. There is a serious time issue with this so if anyone has any ideas please respond! Thanks so much in advance!!
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Are you storing the media on your Macs system drive? The same drive the Avid software is residing on? If so, that could be part of it. Your media shouldn’t be on the same drive as your program. If you’re trying to run it off your external (and it’s 15:1s) it might play back ok–depending on how many streams you’re trying to run. How complex is your project?
Mike.
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thanks so much for responding…so far i’ve tried to play back on the system drive (i’ve found cutting 15:1s off the system drive on the powerbook is no problem) as well as a lacie firewire drive…same problem. I plugged the same FW drive into an avid xpress hd system on xp and it worked fine. I haven’t even started cutting yet, I’m just trying to play back the clips that I diged…I’m sure its a setting somewhere, but i’ve been through everything and can’t figure it out…any other ideas? I’m wondering if it is strictly a PC WIN2000 to Mac OS issue, since I don’t have another Mac to test it on.
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To be perfectly honest, I’m terrible when it comes to Macs. I only worked on one for a year, and the only thing I used was the word processor–still struggled with it (after 15 years of PCs only I found it hard to make the switch). Kept hitting the wrong shortcuts and screwing everything up.
That said, I’ll do my best. Do you have Mojo running on your Mac? If so, try disconnecting the Mojo and plugging your external drive into the firewire slot your Mojo was in. Also, how did you get footage to your Mac before? I assume it wasn’t from the Meridien system.
One more thing–under Media Creation, check to be sure you don’t have Filter Based on Resolution checked. If you do, uncheck it. Otherwise, I would suggest trying to post this same problem in the Avid forums–there are a lot of Mac gurus who post there who would be better suited to help you than I. Just be sure to come back to the COW for everything else! 🙂
What version of XPress are you running on the Mac? What OS version? Anything changed lately (something installed/uninstalled) that could have messed things up?
Mike.
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hey…thanks for the ideas. so…no mojo, previous footage that has been no probs was diged on an xpress hd system running xp. I’ll try the filter based on resolution. i’m running xpress 4.8.2 on OSX 10.4.2. haven’t installed anything recently either. let me know if you think of anything else…and thanks again.
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Does Xpress Pro 4.8.2 have quality settings? That is, a green, green/yellow, yellow button in the timeline? You’ll have to forgive me–I just started using Xpress Pro from version 5.2 on a PC, so I’m not entirely familiar with what’s new and what’s not. If you have the option to change the playback quality, set it to Yellow–lowest quality. This should facilitate playback and may help the lag. I just cut a 2 hour show at 15:1s from a firewire drive and had problems getting video playback from unless I dropped to Yellow. If that’s an option, give it a shot.
Otherwise, I’m not sure what to tell you. I assume you brought everything in with Timecode and well names tapes–the only thing I can suggest from here (but I’ll keep searching for an answer) is to redigitize on a system you know will give you working footage. Transfer the project or bin, Batch Capture, and hopefully it’s not an enormous amount of footage (although I’m sure since it’s 15:1s it’s probably a lot).
Good luck, and let me know if you figure it out. I’ll keep trying to find you an answer.
Mike.
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ok, new twist…as a last ditch attempt to figure it out, i plugged the laptop into my two monitor setup (laptop on left, monitor on right, with the timeline and windows in the monitor on the right) and everything was fine. So obviously it’s something with my laptop display, although other projects still seem to play without the lag…i’m totally stumped, but at least i can get it to work…if anyone has any idea what is going on, please fill me in! Thanks.
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Glad you finally got it working. Thanks for updating us, and best of luck cutting!
Mike.
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