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Mpeg2 rendering time- Vegas6.0d
I have a 42min timeline that consists of a single layer of DV avi files with no effects and only cuts/cross dissolves and a layer of text overlaying most of the timeline. I found that if I used a video quality setting of 24, it took 80mins to render(dual 2.4GHZ XEON/2gig RAM) but the quality was too low. I then tried a setting of best(31) and it took about 4hrs(ouch!). These both used a CBR of 8000 and the CPU’s did stay pegged at 100%. Are these kind of times normal for Vegas? I’m used to a Leitch Quattrus in this system, which is essentially realtime encoding, but I wouldn’t have expected this much time difference for MPEG2 encoding. Would Vegas 7 help? Thanks. BTW, I am impressed with Vegas(I first upgraded my old Premiere4.2 to Premiere Pro 2 but returned the upgrade :-)).
Craig
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5 Replies
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There are numerous factors in rendering times, but I would expect your rig to be faster. Try setting the Dynamic RAM aocation in Prefs> Video to 0 before the render and see if that helps.
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Thanks for the reply. It seems excessive to me too. I tried your suggestion and it made a change but in the wrong direction. 🙂 It made rendering quite a bit longer and the CPU’s weren’t running near 100% any longer. It appears that the setting must change the rate the encoder is getting data. Thanks for the idea though.
Craig
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At the office I have a similar setup, dual Xeons 2.4ghz, 3gig ram. For straight DV video, no effects, other than what you mentioned, Vegas was rendering out mpeg2 at roughly 1.75x. So If a video was 1 hour long, it took 1.75 hours to render. This was using the default mpeg2 stream for DVD architect setting. The quality was as good as it was going to get. This was with Vegas 6d, and actually only 1gig ram at the time. Ram hasn’t decreased rendering time at all. Vegas 7 hasn’t decreased rendering time either for mpeg2.
On my home machine, I have an AMD X2 4400+ and straight video to mpeg2 renders out at roughly .9x so a full hour takes maybe 50-55 minutes. I imagine the new intel Dual Core 2 processors would be even faster. Xeons just aren’t what they used to be.
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Thanks for the info. I decided to try a test with the text overlay track muted and that is what is causing the longer render times. Mpeg2 encoding using all the highest settings was about 1.5:1 just doing straight video. I guess I just got spoiled with my Quattrus system being able to do 4 layers of video and 6 layers of keyed graphics in realtime. 🙂 I’m not yet sure of how Vegas handles graphics yet so perhaps it’s even doing some resizing(I’m using 720×480 graphics for my keyed layer) that it shouldn’t have to. I just got Vegas so there are few “discoveries” to be made on how things are handled. 🙂 Thanks again.
Craig
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I have a 40-minute project I am rendering using an older single-core AMD 3200+ processor (approx 1.5 GHz) with 1 GB memory, and it is taking 6 days to complete. I added Magic Bullet film effects to the entire project and used cross-fades throughout. Otherwise, I applied track motion to about 30 seconds of still frames and color correction on a total of 3 different video tracks. Should rendering this project on this system running Vegas 6.0d take 6 days?
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