[Criis Daw]

thanks for the reply.

i will have a proper look later. Have been diverted into less interesting work.

But in the example i gave I only want the scaling to to be relative to any value above 540. So it would be a total of 15%.

i will have a look at your examples latet and see how i get on.

Many thanks

Chris

[Criis Daw]

Thanks for the reply

but that gives me a straight conversion of pixels in percent.

for example when the y position is 250 my matte scales to 250 %

250 is 23% of a 1080 y axis which is the scale i would predict….

But i dont want any scaling untill the wipe layer has passed the mid point at 540y.

when the wipe has gone past the mid point and come to rest at say 700 i want a scaling of 700-540 = 160 pixels

this 160 then needs to be turned into a % of 1080 so i would get a scaling of ~ 15%.

make sense ?

I can see the maths of what i am trying to do but how to write it in expessions has got me ….

[Criis Daw]

having tied and failed a few more times i have figured out what i want the expression to say .. but lack the skills to say it.

So in english it goes like this:

let the y scale of the matte = 0% when the wipe is at y position 540.

increase the y scale by (1080/100)% for every pixel above 540 that the wipe travels on the y axis.

So i am trying to make the the scale number work in relation to pixel measurements on the screen and have <540 = 0% scale

any help much appreciated.

Ta

[Criis Daw]

Oh my word.

Thanks for your detailed response. I might just find someone else to it .
Not sure I have time for all that right now.

I was only using this old software as the tech bods who own the screens where our video will be displayed recommended using it.

It all sounds rather complicated.. terminal windows scare the pants out of me !!!

Thanks

Chris

[Criis Daw]

FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX

I guess so.

[Criis Daw]

Is this what you mean ? sorry I dont really understand this software

FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
libavutil version: 49.0.0
libavcodec version: 51.9.0
libavformat version: 50.4.0
Fri Nov 8 10:08:36 GMT 2013
movtoy4m
Copyright 2002-2006 Johan Lindström
All rights reserved..
objc[403]: Class TSSandboxPrefs is implemented in both /Library/Frameworks/TSLicense.framework/Versions/A/TSLicense and /Library/QuickTime/Flip4Mac WMV Import.component/Contents/MacOS/Flip4Mac WMV Import. One of the two will be used. Which one is undefined.
objc[403]: Class TSSandboxPrefs is implemented in both /Library/Frameworks/TSLicense.framework/Versions/A/TSLicense and /Library/QuickTime/Flip4Mac WMV Advanced.component/Contents/MacOS/Flip4Mac WMV Advanced. One of the two will be used. Which one is undefined.
Input #0, yuv4mpegpipe, from ‘pipe:’:
Duration: N/A, bitrate: N/A
Stream #0.0, 29.97 fps(r): Video: rawvideo, yuv420p, 720×450
Output #0, avi, to ‘/Users/christopherdaw/Desktop/Halifax_Phase3 /RENDERs/AM Screens/AM SCREEN mov/AMScreen_(720×450)_ATM .mov.ff.avi.e.avi’:
Stream #0.0, 29.97 fps(c): Video: mpeg4, yuv420p, 720×450, q=2-15, 3000 kb/s
Stream mapping:
Stream #0.0 -> #0.0
video:4478kB audio:0kB global headers:0kB muxing overhead 0.581535%
bench: utime=1.933s
Encoding completed on Fri Nov 8 10:08:45 GMT 2013

[Criis Daw]

for particular.

make your particle in a precomp and have it wiggle randomly on your chosen axis

In particular set the particle to a sprite and chose your precomped particle layer.

There are various playback settings for this particle/sprite . one of which is ‘random loop’ or something like that.

I dont have it open so dont know the exact settings but its something like that.

[Criis Daw]

my thoughts exactly ..

i wonder if they have had problems in the past and so specify that it must not be converted

[Criis Daw]

thread back from the dead !!

I too am looking to create an AVI for a sporting venue .

How did you do it ?

[Criis Daw]

yup it looks a bit odd on some shots . it might just have to do though