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• avdevice/x11grab : fix cursor drawing in multi-screen setup

  8 septembre 2014, par Antonio Ospite

  avdevice/x11grab : fix cursor drawing in multi-screen setup
  The code uses XFixes to retrieve the cursor coordinates, but XFixes
  
  gives no information of what screen the pointer is on ; this results in
  
  always drawing the cursor on the captured screen even if the mouse
  
  pointer was on another screen.
  For example, when capturing from screen 1 (i.e. -f x11grab -i ":0.1")
  
  the cursor was being drawn in the captured image even when the mouse
  
  pointer was actually on screen 0, which is wrong and visually confusing.
  Use XQueryPointer to check that the pointer is actually on the screen
  
  which is being captured.
  Signed-off-by : Antonio Ospite <ao2@ao2.it>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavdevice/x11grab.c

• How can I record a rectangle centered around the mouse cursor when it last moved

  28 décembre 2022, par Vesoripi

  I would like an ffmpeg incantation that will do A, or B, or C where

  


  A is…
The ffmpeg incantation will record a rectangle that is centered around the caret (the "text cursor") when text is being typed.

  


  B is…
The ffmpeg incantation will record a rectangle that is centered around the mouse cursor when the mouse cursor is actually moving or when the mouse cursor had been moving less than, say, 2 seconds ago.

  


  C is…
The ffmpeg incantation will stop recording video, yet continue to record audio, if the mouse cursor had not been moving for 2 seconds or longer and the caret (the "text cursor") had not been moving for 2 seconds or longer.

  


  On Linux Mint 21.1 Cinnamon, although both of the following incantations…

  


  ffmpeg -f x11grab -follow_mouse centered -framerate 25 -video_size cif -i :0.0 -preset slow output.mkv


  


  and

  


  ffmpeg -f x11grab -follow_mouse centered -show_region 1 -framerate 25 -video_size cif -i :0.0 -c:v libx264 -crf 0 -preset slow output.mp4


  


  successfully record the mouse cursor as I would like, obviously both incantations fail to record the caret (the "text cursor") when text is being typed.

  


  Here’s my use case…

  


  As a form of documentation, I intend to create screencasts of my coding sessions which I will narrate. I realize that this unusual form of documentation would normally result in large video files. Therefore, instead of recording the entire screen, I would like to record a small rectangle around either the area where I am typing text or—when I am using my mouse—around the area my mouse cursor is located. As a result I hope to create video files which take up less storage space, yet are still useful to me.

  


  For example, I hope that when I review my coding sessions I will be able to quickly be reminded that, for example, "Oh, yeah, that's what I was thinking when I wrote that line of code. Yes. Now I remember : I was stuck, then went to Stackoverflow, did some research, and found solution XYZ to solve my problem.”

  


  In other words, I won’t exclusively be coding during my coding sessions ; sometimes I will be doing research on, for example, Stackoverflow. When I am doing research on—for example, Stackoverflow—I want my mouse cursor recorded.

  


  For your information, follow_mouse at 3.21.1 Options.

  


• Revision 6d07e25a514d832473efad541eabdb76e91a2bf2 : Abstraction mysql : dans sql_insertq et sql_updateq on utilisait ...

  18 septembre 2010, par Cerdic — Log

  Abstraction mysql : dans sql_insertq et sql_updateq on utilisait spip_mysql_cite en lui passant le type. Bien que sql_quote puisse prendre le type en argument, lui utilisait toujours _q() ce qui ne donnait pas un resultat equivalent (cas typique de ’0001’ stocke dans une chaine que _q (...)