Am 22.06.2016 um 00:05 schrieb Robert Van Gemert:
Files exported from android google slides would work for me.
https://www.dropbox.com/s/ncnjt8tlgzasb6f/slide_test.pdf?dl=0
Strategy 1:
use the command line utilities, run WriteDecodedDoc, then use an editor
and overwrite this part with blanks:
/Image3
Do
The file is huge now, sadly.
Strategy 2:
In the source code download, in the examples, there's a program
RemoveAllText.java. That one shows how to work with the content stream:
for (Object token : tokens)
{
if( token instanceof Operator)
{
Operator op = (Operator)token;
if( op.getName().equals( "TJ") ||
op.getName().equals( "Tj" ))
{
//remove the one argument to this operator
newTokens.remove( newTokens.size() -1 );
continue;
}
}
newTokens.add( token );
}
Now you don't want to remove "TJ", you want to remove "Do". I just
tested this, it works for your file. (But it might now work with files
that have a different structure).
Tilman
Thanks for your help.
Robert
On 22 Jun 2016 2:32 am, "Tilman Hausherr" <[email protected]> wrote:
Am 21.06.2016 um 13:12 schrieb Robert Van Gemert:
Hi,
I wish to use pdf as a graphics overlay over video so I need to make the
page background transparent or remove it. Can I use pdfbox to preprocess a
pdf file?
My OS is Android. Initial tests show I cannot use pdfbox for rendering but
preprocessing may work.
Thanks,
Robert
This is difficult to answer as there may be many methods to put a
"background". There is no <BACKGROUND="image.jpg"/> command in PDF. Does
your question apply to one specific PDF or to all possible PDFs in the
world? If only one, please upload it somewhere.
Tilman
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