XPost: alt.comp.os.windows-10, rec.photo.digital   
   From: ollie@invalid.net   
      
   Apparently Irfanview can copy a video frame directly to the clipboard.   
   https://irfanview-forum.de/forum/program/support/92896-help-with   
   capturing-a-single-video-frame-using-irfanview   
      
   Here is a writeup for review by Herbert to ask if this is the simplest way   
   to accomplish the task of graphically choosing the crop area for ffmpeg.   
      
   This is clipcrop.bat as it had to be (minor) modified to fit my system.   
      
    @echo off   
    REM clipcrop.bat   
    start /w "" C:\path\iview\i_view64.exe /clippaste   
      
    for %%k in (CustSelX CustSelY CustSelW CustSelH) do (   
       for /f "delims=." %%i in ('find "%%k=" ^C:\path\iview\i_view64.ini') do   
   set %%i   
       )   
      
    echo  ffmpeg -i in.mp4 -vf "crop=%CustSelX%:%CustSelY%:%CustSelW%:%CustSelH%"   
   -c:a copy out.mp4   
      
   Get a video frame into the Windows clipboard any way you can.   
   For example   
   a. Copy your video to be cropped to "in.mp4" to the current directory   
   b. Rightclick on in.mp4, which will bring up a Windows context menu   
   c. Select "Open with > Irfanview" (which will be 32-bit or 64-bit)   
   d. That should start playing the in.mp4 video inside of Irfanview   
   e. Freeze Irfanview at a desired frame by leftmouse clicking once   
   f. Rightclick in the frozen Irfanview window (which pops up a menu)   
   g. From the menu, select "Copy current frame to clipboard - Ctrl+C"   
      
   Now that the current video frame is copied by Irfanview to the   
   clipboard, you can run clipcrop.bat that Herbert kindly prior posted.   
      
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