Hi

As Terry says the speed adjustment is under Effects, Video effects, Speed.

There is one gotcha which you need to be aware of - if you do not detach the sound track you can only change the speed from 0.25x to 4x normal.

Once the sound track is detached ( I delete it altogether as I do not need it) you can vary the speed of the video by as much as you require - note the slider only adjusts from 0.25x to 4x, however you can type the speed factor into the box to the right of the slider. 

The range of values you can type is 0.01 to 100 anything less than 0.01 does not display and anything greater than 100 appears to crash MEP 2014.

Also when slow-moing ensure you check the Interpolate intermediate images - this will give you a smoother playback . As shown below

John
 

Terry and John...thanks so much..found it!

Terry I was just in London and Newcastle this past June...loved it.  I've picked up a warm ale habit :)

Tom, Mobile, AL

ttowns61,

As Terry away from his computer said, '...in all more recent versions...'. For 'good old (dust off the machine in the spare room) MEP 14 you have two choices for speed adjustment:

There is a special mouse mode (still available) for stretching or compressing the play time of a clip. The cursor, which doesn't show in the screen capture, is a tiny piece of movie film with arrows and you just drag in the direction you want to go.

Alternately there was the original FX window, from the top menu bar or [Shift+Y] shortcut, with a speed slider.

Either way as John pointed out there are limits unless you have ungrouped the audio from the video. The option for interpolation is a relatively new addition -- perhaps you should consider an upgrade?

'Slow motion' seems a standard term. Some programs call speed up effects as 'Time lapse' even if they are not quite as dramatic as flowers opening in three seconds or a house being built in two minutes.

Regards,

Carl

Ah.... since the effect has been found as advertised I'll admit being fooled by the abbreviated program name. MEP 14 is a real program -- but it's not MEP 2014. So much for my trip down memory lane! :-)

For altering the speed of sections you can use the standard key frame animation controls to set different values where you want and get smooth changes between regions. The display in the effects window may seem to jump around some as the distance between KFs change as the playing length is altered.

Regards,

Carl

ADDED: I'v been interested in the slow motion stuff for some time and have just heard about and trying a [watermarked] demo of a new program from proDAD who do some of the plugins for Premium versions of MEP. It looks very promising for anyone wanting to purchase a single purpose (double if you count time-lapse) effect.

http://www.prodad.com/home/products/videoeffects/300610678,l-us.html as a standalone program; the calculations are presumably beyond real time effect plugin.

Above are two clips stretched fifty-fold eg a MEP speed effect setting of 0.02. I'd say MEP interpolates by creating frames with varying degrees of cross-fade between any two adjacent originals, while ReSpeedr uses what it calls 'Optical Flow' to create genuinely new frames. eg The ball against the sky is an extreme example but shows more intermediate positions and the head of the player in the foreground moves quite smoothly with ReSpeedr rather than jumping.

Here's the ~90MB comparison video, my first effort at drop box:

https://www.dropbox.com/s/p31ysvizvu1ranl/slo_mo%20comparison.mpg