Introduction
EnVe refers to two entities. First
EnVe refers to the enve extension
module within EnSight which includes programming routines for manipulating images and
movies. Second EnVe refers to an interactive application with a
graphical User Interface that is built upon the image and movie manipulation extension
module. The enve extension module will be discussed first, followed
by the EnVe application.
The EnVe extension module can be imported into
an EnSight python routine to make use of two main Python
objects: the image and the movie objects to access low-level manipulation methods. These
methods are discussed in detail in then next section. If you wish to use the low-level image
and movie methods, the enve module can be imported into your
EnSight python code with the following statement at the top:
import enve
Higher level manipulation routines that both provide high-level movie and
image functionality as well as serve as enve tutorial routines,
have been included with your EnSight install as an ens_utils module.
Note: You cannot use the ens_utils module
outside of EnSight. To use these routines, simply import the
ens_utils module as follows:
import ens_utils as
eu
These routines translate movies and images to another format, they
concatenate movies or images into another movie of a chosen format, they difference images
or movies and return the statistics on the differences and/or write out the difference as an
image or movie, respectively. Example usage of these routines will be discussed in a bit
more detail in the next section. The ens_utils module is located as
follows:
$CEI/ensight242/site_preferences/extensions/ens_utils.py
The second major entity is the EnVe
interactive application. It is built on the PyQt
(Python interface to the Qt GUI
library) module and the enve module. This application allows
interactive loading and modification of images and movies and can be accessed by typing in
the following at the command line:
enve
Alternatively, double-clicking the EnVe
2024 R2 icon on your desktop will start up the application.
Studying and using the enve modules as well as their usage in the
ens_utils module will help you to understand the
EnVe application's options and using the
EnVe application will help you understand the
EnVe modules.
EnVe Extension Module Programming
Important: The current codec for writing mp4 files does not properly read them. Therefore you can
write mpeg4 files, including those using the H264 standard, but will often fail at
reading them into EnVe and also into the enve
module.