I had the same problem, but the FAQ on the ppower4 homepage helped: (btw i didn't use images)
Q: When I run PPower4 on presentations with larger images, I get an error message starting with
Exception in thread "main" de.tu_darmstadt.sp.paul.PDFStreamException:
could not read stream content from input at ...
A: This happens, if you use the same file name for input and output. While this is possible under certain circumstances, it is not an intended usage.
Use different files for input and output and this problem should go away.
This is PPower4 version 0.9.4.>Emar
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Writing modified output file...
Exception in thread "main" de.tu_darmstadt.sp.paul.PDFStreamException:
could not read stream content from input
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When you meet a master swordsman,
show her your sword.
When you meet a man who is not a poet,
do not show him your poem.
-- Rinzai, ninth century Zen master
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