$ patch -p1 < edm-20070621T152146-ffmpeg-h264.diff 
can't find file to patch at input line 5
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|diff --git a/Changelog b/Changelog
|index 87fba9d..60aded3 100644
|--- a/Changelog
|+++ b/Changelog
--------------------------
File to patch: