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Thread: VMS9: 1st render fast, 2nd slow

  1. #1
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    Default VMS9: 1st render fast, 2nd slow

    Hi. Long time user of VMS, now at VMS9.

    I am rendering 4:3 SD digital camcorder video to WMV 720x480 for Youtube HQ. Most projects in the 4-8 minute range total.

    When I render the 1st time - a 4 minute project is rendered in perhaps 8 minutes. VMS9 drives my quad core system with 4 Gb to 75% cpu busy. If I render the same project, with or without minor edits, the next and subsequent renders take 3x as long and the system will only reach 25% busy.

    If I close VMS9 and restart it before rendering - I see the faster render speed. It seems as if VMS thinks there is a system constraint after the first time.

    Any ideas why this happens? It also happened with VMS7.

  2. #2
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    I'd definitely take that up with Sony Media Software. Go over to their site and raise a ticket, I'm sure they'd be interested/concerned.
    Tim

  3. #3
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    I did just that tonight.

    It seems as if it changed the # of threads from 4 to 2 or 1 after the first render. Hopefully Sony responds.

  4. #4
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    I have found this can happen with every version of vegas since 4.0

    I have also noticed the perf of other resource hungry apps can vary. I think this is a PC thing not a vegas thing.

    I have noted when it happens and it's frequency and severity is clearly realated to time sice reset and how many apps are running.

    Rendering wants ALL your PCs resources as a rule - it is therfore good practice to reset befor large renders to get the best speed.

  5. #5
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    Quote Originally Posted by Mark W View Post
    I have found this can happen with every version of vegas since 4.0
    I hadn't spotted this at all. Maybe I don't tend to render time after time and as I regularly reboot (at least daily) maybe I've been lucky.
    I'll keep my eyes open for this - thanks for the pointer.
    Tim

  6. #6
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    You may never see what I have seen then.

    I hate resetting my pc for some odd reason - often it is on constantly for days and days.

  7. #7
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    Quote Originally Posted by Mark W View Post
    I hate resetting my pc for some odd reason - often it is on constantly for days and days.
    Ugh! I couldn't bear that. If it didn't take 4 mins to get back to a working desktop and another 3 for Vegas to come back up, I'd reboot every hour or so (whilst I go for a leak, put kettle on whatever).
    I also defrag my system, video and data volumes at least once a week.
    Tim

  8. #8
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    Ah - defragging - I forget that often - my c drive is screwed now - still fragged after a defrag - with 2 different de farggers...

  9. #9
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    It is interesting and satisfying that I am alone in seeing this.

    I do not have to restart the computer to restore rendering speed. I just have to shut down VMS and restart it.

    I don't always re-render a project - but it is common. I am editing video of swimming races. Sometimes I make an error in the text frames - so I fix it and re-render. The speed difference is significant from 1st to 2nd render.

    It really does behave as if VMS changed the threads number downward after the 1st render.

    Hopefully Sony responds to my support request and gives some kind of answer.

  10. #10
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    Be sure to pass on thier words of wisdom to us fellow sufferers pls.

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