This property is effectual where both the source and the
destination formats are JPEG. It specifies whether JPEG encoding
occurs. When it is false, the source is directly used as the output
without re-encoding. When it is true, the source is re-encoded in
Reencoding allows a JPEG image to use a different quality level. However, reencoding a JPEG
image at the same/a higher quality level does not improve the image
quality and may degrade it.