RE: Qicktime Stuttering

90Mps is correct.  We are running broadcast quality video from an uncompressed 4:2:2 file.  I determined that the problem was the raid driver.  The mother board has 6 SATA drives, but two built in controllers.  The first SATA controller is made by intel (2 of 4 drives) and works fine, but the second integrated controller was made by adaptec (the other 4 drives), and the motherboard maker (Supermicro P4SCT+II) had re-issued the driver for this controller.  The affect of the old driver was very specific quick time problems.  Once I rebuilt the machine using the updated driver (Hercules I with no ADF) and used the hardware raid to stripe the 4 drives together, I was able to achieve bit rates of 103Mb/s, and the video now plays out great with no problems.

 

Randy Klepetko

Chief Engineer and Technology Consultant

Global Evangelism Television

John Hagee Ministries

239 N Loop 1604 W

San Antonio, Tx 78232

(210)494-3900x1203

email@hidden

 

 

-----Original Message-----
From: Jim Shupert, Jr. [mailto:email@hidden]
Sent: Tuesday, December 13, 2005 1:08 PM
To: Randy Klepetko
Subject: Re: Qicktime Stuttering

 

If what you say is correct

~2Gb for 2:43 minutes

 

that means that the datarate is better than 90Mbps

 

that would choke a horse.

 

a studio to transmitter link is 50 Mbps

 

 

----- Original Message -----

From: Randy Klepetko

To: email@hidden

Sent: Tuesday, December 13, 2005 2:00 PM

Subject: Qicktime Stuttering

 

I have a MOV file generated from final cuts pro, but when I play it on a windows XP machine in QuickTime 7 it stutters with the video and audio stopping and starting in fits.  The machine should be fast enough (3.2 Ghz) and the drives are also fast enough (6 SATA drives spanned in a raid 0 set).  The video file is ~2Gb for 2:43 minutes (786x420 30fps) standard NTSC.  Anybody know what is going on, or how I can tweak out the machine or QT to improve performance?