How To Slow the Speed (adding more frames(?))

Khrysller wrote on 5/8/2003, 11:32 AM
Hello people,

I need to slow motion a part of a video, how to do this in vegas studio? i have search and can figure out how to do. I think adding replicated frames the results will show up (I am thinking on this because I work with Flash, and in flash that´s the way it works :), and I think it´s logical work this way. Sorry the poooooor english.

thanks

Comments

PDB wrote on 5/8/2003, 11:48 AM
In understand you mean Vegas (Video)...It is very easy....right click on the event/clip on the timeline, choose insert velocity envelope...A line (I think its green - in V4 at least) will appear along the middle of the event. Put the mouse pointer over it (it will become a hand shape ...) and drag the line downwards (you'll see that the numbers reduce in %) and that means you are reducing the speed of the clip. If you pull it too far down (to negative %) you are in effect making the clip go backwards!. If you pull it upwards, you are speeding it up...

Hope that helps

Paul
FuTz wrote on 5/8/2003, 11:50 AM
If you start from an already existing project:
You must split the section you want to slow down; select the segment with the pointer (it will become dark blue) and press "s". You now got your split section. Note that your sound track will be affected too! You might want to save this audio track: click the sound clip, got to "Tools" then choose "Render to a new track" to save it. Once it's done, drag it to the end of the project , still keeping it on its own track, just to avoid splitting it altogether with the two other tracks (original ones).

You can now:
1- stretch it : place the pointer at one of ending points of that clip, press ctrl and drag to stretch
2- add velocity envelope : click the clip , got to "Insert" then "Video Envelopes" then "Event Velocity". A line will appear on your clip in the timeline. Put your pointer onto it (it will become a "hand") then drag down to the percentage you want to slow down.

If you're starting from a project "in construction", you simply skip all the "splitting" procedure ; you simply ctrl+drag or put the velocity envelope to the clip on the timeline.

There's a few variables but starting with this will lead you to the "basic understanding" of how it works...
FuTz wrote on 5/8/2003, 11:50 AM
Oops, PDB was faster than me ! ;)
Khrysller wrote on 5/8/2003, 11:54 AM
Very big thanks for the very very fast reply of u 2 buddies...I will test it in home :))))))
PDB wrote on 5/8/2003, 11:55 AM
Futz,
But yours was a FAR more complete answer!!! I'll step aside!

Cheers

Paul.
FuTz wrote on 5/8/2003, 11:56 AM
Oh, I forgot, IF you're using VV3, right click the clip, then "switches" then "resample" for a smoooooother effect!
With V4, it's probably already there...
FuTz wrote on 5/8/2003, 11:58 AM
No Paul, don't step aside! Stay with us, we need you!!!
And you're making me blush now...
PDB wrote on 5/8/2003, 12:05 PM
Oh ok Futz..I'll just pop in to support your post on re-sampling...:-)

Khrysller, In Vegas Video 3, if you really slow down the clip, you MUST apply the re-sample switch as Futz mentioned (or you will probably be unhappy with the quality)...If you are using Vegas 4, there is automatic resampling (smart resample I think they call it) set by default so you don't need to. HOWEVER, I have heard that if you apply the SUPER-sampling switch, the results are astounding, (but generate bigger render times) I haven't tried yet so not talking from experience, but from hearsay from the gurus...

Futz, Well done again on the resampling: VERY important for quality...;-)

Paul
FuTz wrote on 5/8/2003, 12:21 PM


... yours truly... ha ha ha!!!

Oh yes, I tried the supersampling and motioon blur a few time ago and TRUE, the results are very nice. You have to use it sparingly though cause it's really easy to ruin everything if you put too much of it. I'd go for around 1/3 of the scale on both effects to start with... Yes indeed, I tested first with "full throttle" and it was, hum, very "abstract"... veeeeeery "abstract" in fact.
mikkie wrote on 5/8/2003, 12:44 PM
"I have heard that if you apply the SUPER-sampling switch, the results are astounding"

My understanding, and I could very well be wrong...

Say you want to take a red ball and move it over time from one corner of the frame to another, or if you wanted to start with a cropped frame #1 to a full frame (not cropped) #131... VV4 has to figure out just where everything goes in each frame, ie: how far the ball has moved by frame #75.

Now if you think of each frame as a mark on a ruler, going from inch markings to 1/16 of an inch markings makes measurement more accurate. With Supersampling VV4 does just that, createing/adding more frames in between each frame on the timeline. Instead of calculating the ball's position 30 times in a second of video, it would calculate the position 60 times or more (not sure how many frames are added), then record the more accurate positioning on the 30 frames a second it renders.

If Vegas is in effect generating more frames to create slo mo, I would *think* it would be more accurate with Supersampling on, if only by creating a finer measurement of where a frame would fall in the overall motion of the clip. Whether the change would be noticable without any other FX I have no idea. The manual is pretty clear in saying that Supersampling does not improve original video quality, so I don't think it changes how it looks at the original frames, wouldn't actually go to the sub pixel level with the originals in order to create more accurate pictures in the generated frames.