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Using crop/pan with multiple tracks and having a drop out issue.
Hi,
I am compositing several tracks in cascade fashion. The top track crop/pans out of the frame to reveal the next bottom layer. The problem is that while the two tracks are running and you see the upper track move off frame, the lower track is darker than it should be and as soon as the top track ends and you have a full view of the lower track it suddenly goes to normal levels.Running Vegas Pro 10 (D), clip is 1080i from a Sony HDR-CX500v 30 FPS, normal speed. Project is set to the ID of the Sony Clip. Clip properties have disable resample, and reduce interlace flicker checked.
Any idea how to prevent this?
Perhaps I should use track motion instead? Why?
Thanks,
-Phil Loarie -
2 Replies
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[Phil Loarie] “Running Vegas Pro 10 (D),”
Any reason why you are not running 10e? It’s the latest and you could be experiencing a bug in 10d that 10e fixes? Without seeing how you are cropping it’s hard to say why the frame is darker when the cropped image is still in frame. If you are making the frames smaller, you can certainly use Track Motion instead and get the same results.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Hey John,
Thank you for your kind attention. I did some troubleshooting last night and have the following update.In my first post I omitted the effects I had for the these shots thinking the issue was else where–not so. All the composites have the following effects added:
1) HSL: desaturate
2) Brightness and Contrast: B near 0, C at about 15
3) Gradient Map: Sunset
4) at least one mirror (left) and in some two mirrors (left and bottom).What I learned was that if I turned off the Gradient Map effect the problem went away. So there is some weird interaction of Gradient Map with the Crop/Pan feature.
Workarounds:
1) use of track motion instead of crop/pan–works but there I need to add more tracks to get the sliding door effect.2) A better one is to not use either crop/pan or track motion but to use a transition called Barn Door (Horizontal or Verical, in or out)
Summary: Novice compositor unfamiliar with the many flavors of Vegas Pro Transitions tries to due an effect the hard way and runs into trouble. After some troubleshooting he quickly learns that he can do this with far fewer tracks with the right transition(s).
Only one nit: How is the Gradient Map effect messing with the Crop/Pan feature and causing a brightness issue?
ASCII version of composited timeline:
track 1: ======+++
track 2: ……=========+++
track 3: …………============+++
track 4: ………………===================>Each track has a clip that overlaps the track below it. The periods are just space fillers, there is no clip there. The equal signs and plus marks are clips. Where the plus marks are represents the transition where crop/pan moves the upper screen off frame. This is the area where the bottom clip is less bright than it should be, as soon as the upper track terminates its clip, the lower clip has normal brightness.
Please note by using a left mirror and pan/crop together gets a kind of barn door opening effect.
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