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#1 Posted : Wednesday, April 4, 2012 6:58:53 AM(UTC)

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There is an example doing JPEG compression using the StartCompress ... methods.

Is there a benefit to this method of implementing compression over just setting the "QualityFactor" or "CmpQualityFactorPredefined" in RasterCodecs and just using the Save method?

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#2 Posted : Thursday, April 5, 2012 7:28:35 AM(UTC)


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StartCompress() is mainly used when you need buffers and not JPEG image files.
If what you need is a JPEG file on disk (or even in a stream), it's much simpler to use RasterCodecs.Save().

Please note that both methods will use the quality factor you specify in CodecsJpegSaveOptions.QualityFactor, which is a number between 2 and 255.

The value is NOT related to CmpQualityFactorPredefined because that's for the CMP compression and not for JPEG.

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