Sending Graphics to Video Impressions:
When sending existing graphic files for use in a presentation,
please consider the following:
Video resolution is typically 720 pixels wide by 486
pixels tall. In print terminology, a full size video image, at
300 dpi, would be about 2.4" x 1.6" in size, (720/300
& 486/300). While this is not very big by print standards,
it is the largest image size standard video is currently capable of
displaying.
With that in mind, any image over 720 x 486 in size
will eventually have to be reduced in resolution to properly fit the
video frame buffer. Reducing the resolution before sending the
files to our web site will obviously speed up the uploading process,
with no penalty in the quality of the final product.
When reducing an image to the 720 x 486 limit it is
important to keep the aspect ratio of the image intact. Using
a program such as Photoshop, you should resize the image using the
"constrain proportions" option. This allows you to select
either the new width, or height, depending on which one allows the
entire image to fit within the target limits of 720 x
486. The example below shows an original image of 1500 x
300 converted to a final size of 720 x 144. The width of 720
was chosen, and the height of 144 was automatically calculated by
the Photoshop software, keeping the aspect ratio of the original
image intact.
In this example, if the height had been chosen to be
486, the resulting width would be calculated by the software to be
2430, which would be to large to fit in the video buffer. Other
graphics programs have similar features for resizing images.
We can import just about any type of image
format. Because there are so many formats available, some
present fewer problems with compatibility than others. Some of
the most common, (and trouble free), are listed below.
