Question about jerky playback with external USB drive??
Moderator: Ken Berry
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tj3445
Question about jerky playback with external USB drive??
I previously used a Windows 2000 2 ghz system with 1gig ram and a reasonably good nVidia graphics card to run VS9. I captured and edited video from folder in an external WD 7200 rpm USB hard drive and had absolutely no problems. . . however, when I replaced this system with a Compaq Presario 2.2 ghz system with 1 gig of ram running WinXP with an integrated ATI 200 graphics card and tried to use the same external USB hard drive, the capture and playback was so jerky that it was unusable. When I changed the capture folder to the internal C: drive, everything seems to work fine. Any ideas on why the external drive worked well with one system but not the other? Maybe the difference in graphics cards? Thanks for any thoughts!
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THoff
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sjj1805
- Posts: 14383
- Joined: Wed Jan 26, 2005 7:20 am
- System_Drive: C
- 32bit or 64bit: 32 Bit
- motherboard: Equium P200-178
- processor: Intel Pentium Dual-Core Processor T2080
- ram: 2 GB
- Video Card: Intel 945 Express
- sound_card: Intel GMA 950
- Hard_Drive_Capacity: 1160 GB
- Location: Birmingham UK
I'm glad someone has mentioned external USB Drives.
I have removable hard drives in Caddies and still sometimes think I could do with an external drive even if only to move files into "storage".
Suprising how even 400 GB can quickly get filled up when you have to suspend a project when a more urgent one comes along.
Are these external USB Drives any good?
I have removable hard drives in Caddies and still sometimes think I could do with an external drive even if only to move files into "storage".
Suprising how even 400 GB can quickly get filled up when you have to suspend a project when a more urgent one comes along.
Are these external USB Drives any good?
In the setup screen for the bios you may have the option for running usb speeds.
Full Speed or High Speed.
One setting is 12Mbs and the other 480Mbs.
Maybe check the usb settings in the bios setup screen.
Also if the drive is plugged into the same set of usb ports that are being shared with a keyboard or mouse
or other device that is slower it ccan drag down that port to the speed of
the lowest device.
I capture and playback from usb2 drives configured at 480mbs using
an asus p4c800 mb no problems. Also on an HP laptop 2.8 non-hyperthreading cpu 533mhz fsb system.
etech
Full Speed or High Speed.
One setting is 12Mbs and the other 480Mbs.
Maybe check the usb settings in the bios setup screen.
Also if the drive is plugged into the same set of usb ports that are being shared with a keyboard or mouse
or other device that is slower it ccan drag down that port to the speed of
the lowest device.
I capture and playback from usb2 drives configured at 480mbs using
an asus p4c800 mb no problems. Also on an HP laptop 2.8 non-hyperthreading cpu 533mhz fsb system.
etech
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tj3445
Thanks etech!
Your suggestion of not connecting the USB drive to a multiple port worked. When I reconnected to a single-use port, the drive started working fine and I'm back to using it for editing. Again, thanks.
Re: earlier question about USB external drives - - again, except for this recent minor glitch which was easily resolvable, the drive has worked very well for me for both video capture and editing.
Re: earlier question about USB external drives - - again, except for this recent minor glitch which was easily resolvable, the drive has worked very well for me for both video capture and editing.
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THoff
Unless you have an intelligent USB 2.0 hub like the Belkin Tetrahub, the connection between the PC and the hub has to run at the slowest speed of any of the devices plugged into the hub.
A USB mouse, keyboard, webcam etc. can thus force the PC-to-hub connection to run at 12Mbps or even slower, dragging down all other peripherals like hard drives as well.
The Tetrahub and similar hubs avoid this problem by combining all of the connected low-speed devices into a single channel, and having a separate transaction processor for each port on the hub. These hubs are expensive compared to generic USB 2.0 hubs, but can offer significantly better performance.
A USB mouse, keyboard, webcam etc. can thus force the PC-to-hub connection to run at 12Mbps or even slower, dragging down all other peripherals like hard drives as well.
The Tetrahub and similar hubs avoid this problem by combining all of the connected low-speed devices into a single channel, and having a separate transaction processor for each port on the hub. These hubs are expensive compared to generic USB 2.0 hubs, but can offer significantly better performance.