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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 JPEG.
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.
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