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Video editing lag? Seriously??

post #1 of 15
Thread Starter 
I really can't believe this.. I thought that my build would be able to handle anything, but alas no.

Once I add some minor effects in Sony Vegas (Black and white, sharpen) the video preview becomes laggy if I'm watching it on "Best".

I really can't understand why...

Intel i7 4770k running at 4.6Ghz
16GB DDR3 Ram
Gigabyte GTX 770 2GB

Any help would be appreciated. I just can't figure it out.
Edited by RichiRichX - 8/11/13 at 9:17pm
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post #2 of 15
I don't work on video editing much, but I believe it's pretty much impossible to get what you were trying to achieve. These filters/effects just take a really big toll on a computer...I've seen this happen when my girlfriend, who has a pretty beefy computer herself, adds a few effects as well.

I just googled if Vegas Pro supports hardware acceleration : http://www.sonycreativesoftware.com/vegaspro/gpuacceleration

This might be something worth looking at for you, as a GPU can handle these things better (in some cases anyway) than a CPU.

Edit: Maybe Intel Quick Sync can help you out as well...is it enabled? I think it's even faster than using your GPU with rendering but maybe thats not exactly what the preview is doing..sorry if I dont know everything but no one has responded to your thread yet so I thought I'd at least give you some pointers redface.gif

Let me know if it improves thumb.gif
Edited by Kipsofthemud - 8/12/13 at 4:51pm
post #3 of 15
Thread Starter 
Quote:
Originally Posted by Kipsofthemud View Post

I don't work on video editing much, but I believe it's pretty much impossible to get what you were trying to achieve. These filters/effects just take a really big toll on a computer...I've seen this happen when my girlfriend, who has a pretty beefy computer herself, adds a few effects as well.

I just googled if Vegas Pro supports hardware acceleration : http://www.sonycreativesoftware.com/vegaspro/gpuacceleration

This might be something worth looking at for you, as a GPU can handle these things better (in some cases anyway) than a CPU.

Edit: Maybe Intel Quick Sync can help you out as well...is it enabled? I think it's even faster than using your GPU with rendering but maybe thats not exactly what the preview is doing..sorry if I dont know everything but no one has responded to your thread yet so I thought I'd at least give you some pointers redface.gif

Let me know if it improves thumb.gif

Thanks for your answer wink.gif

I tried enabling GPU acceleration of course, but the preview window became completely red and Vegas crashes when I press play.

Apparently the 600 series and 700 series Nvidia cards experience tons of problems with Vegas. They're not very well supported I guess. A shame.

Anyway I just don't think that my PC could be lacking. I highly doubt a second GPU would help because when I was editing, only the CPU load went up, and it barely hit 60%, whereas the GPU load didn't even hit 10%.

I wish I could find a fix to this but nothing turns up on Google... :\

-Rich
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post #4 of 15
Quote:
Originally Posted by RichiRichX View Post

Thanks for your answer wink.gif

I tried enabling GPU acceleration of course, but the preview window became completely red and Vegas crashes when I press play.

Apparently the 600 series and 700 series Nvidia cards experience tons of problems with Vegas. They're not very well supported I guess. A shame.

Anyway I just don't think that my PC could be lacking. I highly doubt a second GPU would help because when I was editing, only the CPU load went up, and it barely hit 60%, whereas the GPU load didn't even hit 10%.

I wish I could find a fix to this but nothing turns up on Google... :\

-Rich

Yeah mate a 2nd GPU wouldnt help at all (not sure if you understood if that is what I meant, but I didnt wink.gif ) If you're having trouble with the GPU, maybe you could try installing the Quadro/Tesla (whatever they're called these days) drivers(or possibly even the bios, I dont know if you can use your 770 to pretend you have a Quadro/Tesla, I know you could with a 690 or 680) to see if they are more stable when using Vegas?

What about Intel Quick Sync? It's supported by your CPU and it should help with rendering or transcoding or w/e very, very much. Should be tons of stuff on google on how to enable it, maybe even specifically with your motherboard!

If you say the CPU load only goes up to 60%...then I highly doubt it's your hardware though...What about your RAM, is that fully used when you're doing the preview thing?

Some things that came to mind..maybe one of these things help thumb.gif

Edit: Have you tried the build Ram preview option yet?
Edited by Kipsofthemud - 8/12/13 at 6:42pm
post #5 of 15

How much memory are you using when it slows ups?

What hard drives? What resolution content?

 

Your problem doesn't sound related to the gpu anyway, since as you said, enabling acceleration created problems so I'm assuming you have it disabled.

post #6 of 15
Thread Starter 
Thanks for your replies guys.

Only about 6-7 GB are being used when I'm editing (41% of my RAM). So it can't be that.. 16 Gigs is more than enough.

I'm starting to suspect: could it be the hard drive? All the footage is on a Western Digital Blue 1TB. Maybe 7200RPM isn't enough? It's definitely connected to the fastest Sata 3 port on my motherboard, but I don't know :\

I'm not running any other heavy apps that need the HD at the same time.
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post #7 of 15

Quite possibly.

post #8 of 15
One thing you might try -- is get a second HDD or a SSD for scratch space. When you start working with large video files, the disk becomes bottlenecked trying to read AND write the data at the same time. I'm sure Vegas allows you to set up "scratch disk" - make it as fast as affordable. A 500MB/sec sequential speed SSD would be perfect, but another WD Blue 1TB single-platter HDD would be better than what you're doing now.

Keep in mind, if you're working with full HD video (1920x1080) that the video data itself takes up 445 GB per hour uncompressed. The files you read and write might be a lot smaller than that, but the system has to decompress whatever you're working with in real-time, then re-compress it to write the stream back out to disk. That's a lot of bandwidth.

Greg
post #9 of 15
Thread Starter 
Ok, I have found a possible fix.

I went to Options > Preferences > Video and then enabled "GPU acceleration of video processing". I said that Vegas would crash before when I enabled this, but it magically works now...

After restarting Vegas, there was no more lag when previewing with "Best" (Full). (Bitrate went up from ~15,000 to 24,000). And I can see that the GPU load is at about 30-40%.

However, this only works if you're watching a clip, that has no other clips under it on other tracks. I don't know why, but Vegas has always had this problem... Multiple layers of video at the same time will always lag.

Thanks for your reply Greg. Regarding the scratch disk - I thought that's only useful when you're out of ram, isn't it? I frankly can't find any scratch disk settings in Sony Vegas, but I've allocated it lots of ram.

The video files aren't that really. I have a total of 32 Gigs of footage, and I'm barely working with half of it at the moment.
Edited by RichiRichX - 8/12/13 at 9:44pm
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post #10 of 15
Would probably be under media cache or something like that. If its anything like Premier, it copies files from the source to the cache drive depending on prject settings (you can set it to read from source or copy to a new location) not sure how Vegas manages things. I'd go raid 0 with another 1tb drive rather than add a ssd; you'll burn it out pretty quickly with heavy editing use.

A fast drive wouldn't hurt; typically everything is cached in ram, but reading/writing from/to the drive will always be the slowlest part in the process. Not too much of a problem as long as you're not hitting the memory limit.
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