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RT Playback Issue

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Bill Paris
RT Playback Issue
on Oct 8, 2010 at 7:57:56 pm

I have an issue with playback on my system. I'm editing HDCAM 29.97 Footage in Apple Pro Res HQ with a 2X3 GHZ Quad Core Intel Mac with 10 gigs of Ram/Kona 3 Card and ESATA Raid 0 Drives.

The Problem: The video is choking on playback. I should have enough RAM and the drive speeds should be high enough, but the system keeps choking on playback. It happens just enough that I'm having a hard time outputting our 1 hour show.

My RT setting are "Safe RT" "Dynamic" Playback and Frame rates.

Any ideas would be appreciated!

Thanks!

Bill Paris
Producer/Director of Photography
Crew Hawaii Television
http://www.crewhawaii.com


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Rich Rubasch
Re: RT Playback Issue
on Oct 8, 2010 at 7:59:32 pm

How long is the program and how large is the project? Any large stills in the sequence? Hmmm.

Rich Rubasch
Tilt Media Inc.
Video Production and Post
Owner/President/Editor/Designer/Animator
http://www.tiltmedia.com


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Bill Paris
Re: RT Playback Issue
on Oct 8, 2010 at 8:29:47 pm

Rich,

The show is one hour .... to help with playback I closed all sequences and created one quicktime file with the hope it would playback without issue. Still not working. The project file is 36mb .... there are a few photos, but it seems to be choking ar random locations. All the media is stored on a freshly cleaned raid.

Bill Paris
Producer/Director of Photography
Crew Hawaii Television
http://www.crewhawaii.com


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Dave LaRonde
Re: RT Playback Issue
on Oct 8, 2010 at 9:40:16 pm

[Bill Paris] "...I closed all sequences and created one quicktime file with the hope it would playback without issue. Still not working. The project file is 36mb ...."

That's a darned big project file, at least in my limited experience as a guy who makes news & weather promos.
What happens if you create a brand-new project file, import that single quicktime file and give it a go?

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Shane Ross
Re: T Playback Issue
on Oct 9, 2010 at 12:31:07 am

For enough footage for a one hour sequence, that is not a large project file. It is aptly sized.

What's the read/write speed on those drives?

Shane



GETTING ORGANIZED WITH FINAL CUT PRO DVD...don't miss it.
Read my blog, Little Frog in High Def


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Steve Eisen
Re: T Playback Issue
on Oct 9, 2010 at 1:01:41 am

And to add to that, how many drives do you have in your raid? Hopefully a minimum of 4.

Steve Eisen
Eisen Video Productions
Vice President
Chicago Final Cut Pro Users Group


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Bill Paris
Re: T Playback Issue
on Oct 9, 2010 at 4:51:10 pm

Hi Guys,

Thanks for your responses,

I'm away from the office at the moment and will check the drive read write speeds. The raid is a PROMAX esata 8tb raid with 8 drives configured to raid 0, I'm pretty sure they're 7500 rpm. Before starting this project, I re-formatted the the raid and all the project media including the quicktime clip are stored on this raid.

One detail that could be important? I have the project file stored on a Drobo raid that is connected to the system via FW800. I've never done this before, but wanted to make sure to have the file backed up in case of a drive failure. Could this be causing the playback issue?

Thanks!

Bill Paris
Producer/Director of Photography
Crew Hawaii Television
http://www.crewhawaii.com


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John Pale
Re: T Playback Issue
on Oct 9, 2010 at 6:05:31 pm

Your drive array sounds like it should be fast enough, however you need to check its actual performance.

A good way to do that is to download the AJA System Test from http://www.aja.com.

If your eSATA card is slow, it will vastly underperform. For instance, if you have the $50 2-port Sonnet card you will get MUCH slower perfomance than the more expensive 4 port model.

[Bill Paris] "One detail that could be important? I have the project file stored on a Drobo raid that is connected to the system via FW800. I've never done this before, but wanted to make sure to have the file backed up in case of a drive failure. Could this be causing the playback issue?
"


Maybe. Can you try having the project file on your internal drive instead. FW800 is still way slower than your internal SATA connection.


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Bill Paris
Re: T Playback Issue
on Oct 9, 2010 at 6:18:30 pm

John,

Thanks for the info..... I will try the AJA test to see how the well the drives are performing. I do have the 4 port esata card with a second 5TB raid attached. I'll try moving the project file and seeing what happens and also try moving the QT file created from the show to a new project to see if that plays back without issue.

Thanks!

Bill Paris
Producer/Director of Photography
Crew Hawaii Television
http://www.crewhawaii.com


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