Hello Robert, 1) I went directly to plugins/video/H.263 ffmpeg/ directory (after I compiled ptlib and opal) 2) downloaded http://www.voxgratia.org/bin/libavcodec-0.4.7-windows.bin.zip as is written in readme file and unzipped it into plugins/video/H.263 ffmpeg/ffmpeg 3) I've opened the 'h263ffmpeg_2005.vcxproj' file and saved solution which VS2010 created for this project 4) Build it 5) No errors - result is ../../Debug/h263ffmpeg_pwplugin.dll (and the rest things such as .pdb file) Best regards, Vladimir P.S> this is resubmitted, because last time I just replied to Robert and did not used the other addresses as well. Sorry about that.