Lag in playback issue.

jgastelb

jgastelb

Well-known member
I'm wondering if anyone has any tips about this.

I recently bought a PC that can handle AVCHD footage (from the AF100). The playback was silky smooth at best/full resolution. Loved that. However, something has changed in the last couple of weeks. The videos in the preview window are not playing all the frames any more. There's a stutter that wasn't there before. I'm not sure what's going on. Even if I switch to draft (full), the cadence staggers. That's not right.

Things to consider:
1. Checked on the hard drive. No need for defragmentation.
2. Hard disk has more than 1.5tb free. Plenty of space.
3. Uninstalled some recent programs to make sure it wasn't a compatibility issue.

I'm running Sony Vegas Pro 10e (64bit). I also have the 32 bit version installed but not running.

PC specs:
i7, 64 bit, tri-channel 12gb ram, 960 @ 3.20GHZ.

Any clues? Suggestions?

Jgastelb
 
I'm having a similar issue on my i7 Dell XPS. Personally I think my video card is the weak link, and I'm in the same boat with AVCHD footage (GH2, HMC150). As a note, I always have the video preview quality set to "Preview" not 'best'. Best always seems to have unwanted motion blur.. just my two cents.
 
Hi Guys,
I have the same problem, especially when I have a clip that has various video Fx add-ons (chroma key, color correction, etc.). To sort the problem, I just highlight the clip (or part of the clip) in the timeline by clicking and dragging the two yellow arrow markers at the top of the timeline box. Once these highlighted the clip, press shift B and Vegas will do a quick render of the highlighted clip. Once that is done, the playback runs smoothly for me. I don't know whether you have already tried this but I just thought I'd put it out there. Hope it helps.
 
Slower playback will also occur if you move from 8-bit to 32-bit color space, add motion blur or oversampling, apply pan/crop or 3d track motion, or change track compositing modes.. Shift-B is a great solution - it uses available video ram for preview, so eventually, it will run out or be used for rendering other frames.. Vegas also has a "pre-render" feature that saves a file to scratch disk.
 
Adding FX will slow down playback. Chroma key and color correction are two of the most processor-intensive, and thus two of the biggest culprits.

The video card has nothing to do with it.
 
Have you installed any programs on that computer, possibly before you noticed the slowdown? It could be a system resource issue, since many programs configure themselves to run .dll files in the background upon computer boot-up. You can stop this from happening by going to your 'run' prompt and typing MSCONFIG. Then go to the 'start-up' tab and whatever has a checkmark next to it is running in the background at all times, thus slowing down your computer. On my computer, I only leave my anti-virus software with a check mark, and my laptop touchpad app. By unchecking all other programs you are freeing up system resources, which allows your computer to boot faster and run faster. These programs will still work, but will take .005 seconds longer to start up.

Dave
 
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