The feel of motion of the image has to do with timing and mode of key frame together

If your image is coming in and the first key frame is fast 0 smoothness and the last keyframe is slow 100 smoothness then the image will rush in to easy slow
If you want to emphasize the motion scrub between the two keys and let Vegas create a linear key = “plus icon” because the motion is already a given from the two existing keys then slide this linear key slightly back in time this way you get a smooth motion flow without you guessing where the path should be etc.

This topic is difficult to explain in text form, and indeed one of Sony's recent on-line tutorial videos (under training) covers this topic well.

Several comments will probably try to cover the answer with the style -linear, etc....but I think what the OP is looking for and will need to grasp is setting the pace of path motion with the distance in runtime between keyframes that are more alike, than they are different. The combination of the style and the pace of the motion path set the tone for the effect created.

Because Vegas does not have a motion path it requires that the editor keep some form of mental image of the composition environment

One way to do this is create a 3d container comp which you rotate to get a top head view with a key frame hold and a normal front view also hold as you work keep sliding the two key frame top view into your current working position on the time line or front camera view so you slide them back and forth helps you keep the mental image of where you are visually in the animation.

In the motion let Vegas determine the key for example see visual the moon is coming forward create in key fast and end key slow so now I need it to jump scrub to the area create a key before the jump and one after the jump then in between create a key which you actually move the moon in this way the motion will be smooth and you don’t need to create all the motion yourself just the first and last key and then the jump key.

Visual
http://goo.gl/BhS2G

This is a great tutorial.
Vegas Keyframe Interpolation Envelopes

Mike

Hi Mike (rs170a),

thank you for your link. I knew this tutorial and I tried it by my own. But exactly this animation looks weird in my own project. All of my Animations are looking linear - there is no acceleration at the begin or deceleration at the end.

Is there anything else I could try?

Thanks in advance.
Jörg

Let's see one of your animations. "Linear" in motion means the time and distance between each frame in the animation is equal.

A great way to see what the difference curves represent is to right click on a fade and choose "fade type." You'll be presented with different graphs. Top one is slow, then linear, then fast, then smooth, the finally sharp.

Joerg, I have found the same as you - it is challenging to get motion to look organic in Vegas. What I have found to work pretty well is to create a "controller" for each motion direction. Do this by using Vegas' parent motion and create three "controller" tracks above your media like this.

"Z-controller" (parent of "Y-controller")
"Y-controller" (parent of "X-controller")
"X-controller" (parent of "Your Media")
Your Media

Now you can control each motion component individually (including the keyframe smoothness settings) and this allows you to get pretty nice organic motion.

The motion on this "leaderboard" was done using this technique:
http://vimeo.com/35846352]

/jerry