Flash Templates Tutorials - JPEG Properties
Configuring JPEG properties
JPEG format retains an image of high degree of compression, 24 -bits dotted image.
In general, GIF is better for the export of line graphics, while JPEG can be better for images, which include a number of gradients, or embedded dotted drawings.
Flash exports the first frame in the clip as JPEG, if you do not check other keyframes for export by checking Static frame box.
JPEG settings properties management in Publish Settings dialog box
Dimensions - Sets the size of the exported bitmap image in pixels, which you enter in the fields Width and Height. If you enable Match Movie, entering any data into the fields Width and Height has no effect, and Flash makes JPEG at the same size as the clip. Flash ensures that the size that you determine always has the same compression ratio as your original image.
Quality - Manages JPEG file compression. The lowest image quality produces smaller files, while the higher quality produces large files. Try different properties settings to determine the best exchange between size and quality.
Progressive - Creates display progressive JPEG images. These images are displayed by browsers as far as downloading from web and can appear faster when loaded on a slow network connection. This option is similar to Interlace in PNG and GIF.