faster startup on windows by asking for ffmpeg.exe explicitly

rather than just "ffmpeg" which makes windows try to open each of
ffmpeg.BAT,CMD,COM,EXE,JS,JSE,MSC,VBE,VBS,WSF,WSH one by one
(ffmpeg.js? hello??)

scripts/pyinstaller/build.sh

@@ -9,7 +9,7 @@ tee build2.sh | cmp build.sh && rm build2.sh || {
     [[ $r =~ [yY] ]] && mv build{2,}.sh && exec ./build.sh
 }
 
-[ -e up2k.sh ] && ./up2k.sh
+[ -e up2k.sh ] && [ ! "$1" ] && ./up2k.sh
 
 uname -s | grep WOW64 && m=64 || m=32
 uname -s | grep NT-10 && w10=1 || w7=1
@@ -73,6 +73,7 @@ excl=(
     multiprocessing
     pdb
     pickle
+    PIL.EpsImagePlugin
     pyftpdlib.prefork
     urllib.request
     urllib.response