What frame rate was selected? Was the video length 2m19s? If the frame rate was 25 and the video length is 2m19s, I would certainly like to know how come your file size is only 55 MB at 1280x72 rez while mine with the same settings is 140 MB.
There was only a 20MB difference between 15 fps and 25 fps here. 15 fps is not even an option because of dropped frames but I did it just out of curiosity. The settings I chose were nothing new....always 1280x720, 25 fps, quality 90% (I leave this default setting as it is).
True that mp4 in general has a smaller sized file. I guess I'll try this format.
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My observation with the earlier versions has been that the files created in VP in winxp tended to be about 20 percent smaller than those created in win7. So I tried to install the latest version that you sent in winxp (my computer has dual operating system). I got a "~.exe is not a valid win32 application" message. Is this version available for installation in winxp?