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I try to convert the first page of a book to a png, scale the png to a certain size and add a black border. This is what I tried:

convert tmp.pdf\[0\] -background white -alpha remove -border 8 -bordercolor black cover.png

This is the document, I want to convert.

For some reason I have to specify -background white -alpha remove since otherwise my white border does not appear or is grey. My problem is that the border that is added is grey not black. Is there anything I can do?

  • what does \[0\] do? – Lee Oct 31 '16 at 14:55
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What worked for me is moving the -bordercolor option before the actual -border statement:

convert tmp.pdf\[0\] -background white -alpha remove -bordercolor black -border 8 cover.png

should do the trick. I can't find anything in the man page that points to why this should be so, though.

  • Thanks a lot! I tried moving the two related options together, but did not try this one. Thanks! – Stefan Müller Dec 4 '13 at 19:10

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