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Old 03-05-2015, 09:31 PM   #2
kovidgoyal
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IIRC images are processed only if they are not already in jpeg format, if their colorspace is not RGB (thought that might be only epub not pdf, I dont recall) or their size is too large for the page.

Hard to say which if any of to say conditions your images are falling foul of without the input document.
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