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Slow rendering with Vegas Pro 8
When I render with vegas 8 in HD 1480×1080 or similar, it takes hours to render 30 mins of footage.
Is this normal?
Are there any tricks I can use to speed it up?
I have a dual core, 2.5 gh laptop with 4gb of ram.
If I use the 640×480 setting it still takes 2 hours.
Surely you do not have to leave it overnight to render do you?
cheers. -
3 Replies
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> When I render with vegas 8 in HD 1480×1080 or similar, it takes hours to render 30 mins of footage. Is this normal?
HD is a broad term. What specific HD format? DVCPROHD? HDV? AVCHD? The compression used by the format will be a major contributor to how long it takes to render. The other major contributor is the FX that you’ve applied. If you’ve done any color correction then Vegas has to process each and every frame of the video and this can take a while. It is not uncommon for AVCHD to take 5x real-time meaning one hour of AVCHD can take 5 hours to render on slower PC’s.
> Are there any tricks I can use to speed it up?
Buy the fasted QuadCore processor you can afford. Vegas rendering is mostly CPU bound. Also make sure you didn’t inadvertently change the opacity by accident or apply any other global FX that causes all of the frames to be re-processed unless you really mean it.
> I have a dual core, 2.5 gh laptop with 4gb of ram.
The Sony site specifies a 2.8GHz as the minimal for HD editing. Is this an Intel “Duo Core” as apposed to an Intel “Core 2 Duo”? There is a BIG difference. The former is older and slower than a single core while the latter is the latest (and fastest) Intel technology. Avoid “Duo Core” and only buy “Core 2 Duo” or “Core 2 Quad”
> If I use the 640×480 setting it still takes 2 hours.
Yes, rendering at 640×480 will take a LOT longer than rendering at 1440×1080 because in addition to processing every frame for FX, you are asking Vegas to resize every frame from 1440×1080 to 640×460 30 times for each second of footage (if it’s NTSC). That’s a lot of work.
> Surely you do not have to leave it overnight to render do you?
If the HD is AVCHD and you’ve applied color correction and your PC is underpowered for the job… yes, overnight rendering may be your only option.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
It really is about horse power so the best setup is a fast machine (over 3ghz) plus additional cores (quad). The new Intel I7 sounds like the way to go.
Harold
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http://www.BhagaVideo.comCheck out my published DVDs at
http://www.edellismagic.com/Previews.html -
Some effects can really slow the rendering – especially if you’ve accidentally nudged the opacity of any track to 99%.
Steve Mann
MannMade Digital Video
http://www.mmdv.com
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