Ok, I've been trying to work thru DV Rack issues on my laptop, so there's been a lot of changes in the last week - upgraded to the lastest XP SP1 hotfixes (NOT SP2), updated my ATI Video drivers, installed Vegas 5.0d (was on 5.0c). Now all of sudden my rendering times are all out of whack - something that normally took 8 minutes is taking 40 minutes. Plus, the rendering times don't make sense as far as what is in the stack of tracks - moving stuff around changes the render times in a non-intutive way. I have simplified it down to a few sample test cases where I generate a 30-sec test video that I hope someone can try and see what they get.
- I start with a new NTSC DV project.
- I have two stills:Pic1 is 655x480x24 JPG (45KB) and Pic2 is 2160x1440x24 JPG (897KB). Pic1 exactly fits the screen, Pic2 has empty space above and below. I do not change pan/crop - just plop the pictures in the track, and drag the edge out to 30-secs.
- I have a 30-sec video clip -standard AVI file captured from the camera. I remove the audio track when I put it in the timeline.
- I have three tracks - all are at 100% opacity, no fx, no track motion, no pan/crop. All us the Source Alpha compositing mode. I drop Pic1, Pic2, and the video clip in tracks 1, 2, and 3, as shown below.
- I created a 30 second video using the above pieces, rendered to a Windows AVI file, NTSC DV template.
Here's what I get for render times for a 30 sec video:
1. Pic 1 only (655x480): 39 secs
2. Pic 2 only (2160x1440): 56 secs
3. Pic1 over Pic2 (so Pic1 completely obscures Pic2): 16 secs!!!!
4. Pic 2 over Pic1 (Pic1 shows around the edge of Pic2): 36 secs!!!
5. Video only: 16 secs
6. Pic1 over video: 62 secs
7. Pic2 over video: 80 secs
8. Pic1 over Pic2 over video: 87 secs
9. Pic2 over Pic1 over video: 106 secs
10: Video over video: 16 secs
So what I don't get is this: PIc1 by itself, filling the screen, takes 39 secs. But drop Pic2 underneath it, which doesn't affect the outcome because Pic1 completely obscures it, and the time drops to 16 secs! Then, add a video clip beneath both, which is still completely obscured by Pic1, and the render time soars to 106 secs. It seems like Vegas should be smart enough to realize when an upper track totally obscures a lower track and take advantage of that - as test 10 shows - a video over a video does NOT increase the render time. And, in example 3, a picture obscuring another picture resulted in a fast render time. But throw the video below the pics, and boy, the render time shoots up 6-fold! And why would the render time for a single pic (test 1) be LONGER than the render time for two pics even though the top pic obscures the bottom?
I'm not sure if this is something new in 5.0d or not...
- I start with a new NTSC DV project.
- I have two stills:Pic1 is 655x480x24 JPG (45KB) and Pic2 is 2160x1440x24 JPG (897KB). Pic1 exactly fits the screen, Pic2 has empty space above and below. I do not change pan/crop - just plop the pictures in the track, and drag the edge out to 30-secs.
- I have a 30-sec video clip -standard AVI file captured from the camera. I remove the audio track when I put it in the timeline.
- I have three tracks - all are at 100% opacity, no fx, no track motion, no pan/crop. All us the Source Alpha compositing mode. I drop Pic1, Pic2, and the video clip in tracks 1, 2, and 3, as shown below.
- I created a 30 second video using the above pieces, rendered to a Windows AVI file, NTSC DV template.
Here's what I get for render times for a 30 sec video:
1. Pic 1 only (655x480): 39 secs
2. Pic 2 only (2160x1440): 56 secs
3. Pic1 over Pic2 (so Pic1 completely obscures Pic2): 16 secs!!!!
4. Pic 2 over Pic1 (Pic1 shows around the edge of Pic2): 36 secs!!!
5. Video only: 16 secs
6. Pic1 over video: 62 secs
7. Pic2 over video: 80 secs
8. Pic1 over Pic2 over video: 87 secs
9. Pic2 over Pic1 over video: 106 secs
10: Video over video: 16 secs
So what I don't get is this: PIc1 by itself, filling the screen, takes 39 secs. But drop Pic2 underneath it, which doesn't affect the outcome because Pic1 completely obscures it, and the time drops to 16 secs! Then, add a video clip beneath both, which is still completely obscured by Pic1, and the render time soars to 106 secs. It seems like Vegas should be smart enough to realize when an upper track totally obscures a lower track and take advantage of that - as test 10 shows - a video over a video does NOT increase the render time. And, in example 3, a picture obscuring another picture resulted in a fast render time. But throw the video below the pics, and boy, the render time shoots up 6-fold! And why would the render time for a single pic (test 1) be LONGER than the render time for two pics even though the top pic obscures the bottom?
I'm not sure if this is something new in 5.0d or not...