.PP
The way the
images are encoded in SWF is very similar to PNG (in that a zlib-based, lossless
-compression algorithm is used). Under special circumstances, when the image
-is 32 bpp with alpha information, it is converted to (lossy) jpeg compression
-though, to preserve the alpha, which can't be encoded in any other way in the SWF.
+compression algorithm is used).
-r, --rate <framerate>
Set movie framerate (frames per second)