EffectStream
EffectStream function creates the effect of a flowing water stream
across the image.. The stream flow can be either vertical or horizontal.
Freq of flow, Stream breadth, wavelength, axis (stream axis) coordinate
are the parameters. It is required that the parameters axis and breadth
are so specified that the whole stream strip is within the image.
Note in some rare situations (bug in software) streaks may appear on image
(as seen in image below).
RGB32, RGB24, YUY2 and YV12 formats only are supported.
Details of parameters
| Description |
Name |
Type |
Limits |
Default |
| clip |
|
clip |
|
none |
| Effect start frame number |
sf |
Integer |
within clip |
first frame |
| Effect end frame number |
ef |
Integer |
within clip |
last frame |
| Direction of stream |
|
string |
"hor" or "ver" |
none |
| frequency |
freq |
integer |
1 to 4 |
1 |
| stream breadth |
breadth |
integer |
multiples of 12, less than 3/4 of frame dimension |
60 |
| wavelength |
lambda |
integer |
12 or more, multiple of 4, max 1/3 of frame dimension |
60 |
| stream axis coordinate |
axis |
integer |
ensure all of frame width is within frame |
frame central line x or y as per direction specified |
#Usage examples:-
EffectStream(last,50,90, "hor",1,120,48,200)
EffectStream(last,59,190 "ver", axis=200)
Image with effect :
