[solved] Exclude recordmydesktop from picom shadows

ExoDoom · 2022-09-11 11:26:54

Hi folks!

I'm using https://aur.archlinux.org/packages/screencast to take some videos on my desktop. I would like to set some keybindings on openbox to both start and stop recording. I have no problems starting the recording session, but I need to send a "q" to the process in order to stop the recording and save the video file. I have tried some mkfifo/pipes/interrupting magic, but my magic doesn't seem to be that powerful :-/

Any ideas?

Thanks in advance.

Last edited by ExoDoom (2022-09-12 14:06:56)

seth · 2022-09-11 11:42:39

It might gracefully respond to sigterm, sigint or sighup? Maybe some sigusr1 or sigusr2?
(kill -l)

If you really have to send a key, "xdotool key --window" might get you there, but you need to know the window ID where to send the key and also the client might ignore synthetic events or input w/o being focused.

ExoDoom · 2022-09-11 19:08:12

Hi folks!

Thank you very much for your response, seth.

It turned out that screencast doesn't finish recording with any interrupt signal, just with that "q", but recordmydesktop did the trick (it finishes with a SIGTERM). So I just switched to recordmydesktop, though I liked the webcam overlay feature of screencast :-/

Now I'm facing a little bit annoying issue between recordmydesktop and picom. Whenever I activate shadows on picom, the shadow is applied to the whole recorded video. If I configure the shadow-exclude property to include "window_type = 'normal'", the shadow disappears (but it disappears from all "normal" windows, I'd like to exclude it only from recordmydesktop). I have tried to get the window properties so I can exclude a window name, class, etc. but this "window" seems to have no properties:

$ xwininfo -all

xwininfo: Please select the window about which you
          would like information by clicking the
          mouse in that window.
                                               
xwininfo: Window id: 0x3400003 (has no name)

  Root window id: 0x7b7 (the root window) (has no name)
  Parent window id: 0x7b7 (the root window) (has no name)
     0 children.                            

  Absolute upper-left X:  678
  Absolute upper-left Y:  308
  Relative upper-left X:  678
  Relative upper-left Y:  308
  Width: 556
  Height: 380
  Depth: 24
  Visual: 0x21
  Visual Class: TrueColor
  Border width: 0
  Class: InputOutput
  Colormap: 0x20 (installed)
  Bit Gravity State: ForgetGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: yes
  Map State: IsViewable
  Override Redirect State: yes
  Corners:  +678+308  -686+308  -686-392  +678-392
  -geometry 556x380+678+308

  Bit gravity: ForgetGravity       
  Window gravity: NorthWestGravity                                                                                                                                                             
  Backing-store hint: NotUseful                                                                
  Backing-planes to be preserved: 0xffffffff                                                   
  Backing pixel: 0                        
  Save-unders: Yes                    
                                               
  Someone wants these events:                                                                                                                                                                  
      Exposure
      SubstructureNotify
      FocusChange
      PropertyChange
  Do not propagate these events:
  Override redirection?: Yes

  No window manager hints defined
  Window manager hints:
      Process id: (unknown)

  No normal window size hints defined
  No zoom window size hints defined

  Window shape extents:  556x380+0+0
  No border shape defined

$ xwininfo -id 0x3400003

xwininfo: Window id: 0x3400003 (has no name)

  Absolute upper-left X:  678
  Absolute upper-left Y:  308
  Relative upper-left X:  678
  Relative upper-left Y:  308
  Width: 556
  Height: 380
  Depth: 24
  Visual: 0x21
  Visual Class: TrueColor
  Border width: 0
  Class: InputOutput
  Colormap: 0x20 (installed)
  Bit Gravity State: ForgetGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: yes
  Map State: IsViewable
  Override Redirect State: yes
  Corners:  +678+308  -686+308  -686-392  +678-392
  -geometry 556x380+678+308

$ xprop -id 0x3400003
(silence)

It's not that big issue (I mean, I can just turn off the shadows), but it would be great is someone gave me some clues :-)

BTW, this is my keybound script, in the case someone finds it useful:

#!/bin/bash

pidof recordmydesktop && kill -SIGTERM $(pidof recordmydesktop) && notify-send -i recordmydesktop "recordMyDesktop" "La grabación ha finalizado." && exit 0

_fileName() {
        local FOLDER="$(xdg-user-dir VIDEOS)/Capturas"
        [ -d "$FOLDER" ] || mkdir -p "$FOLDER"
        echo "${FOLDER}/Captura $(date +%Y%m%d%H%M%S).ogv"
}

gxmessage -title "Screencast" -name "SCREENCAST_MANAGER" -center -borderless -ontop -sticky -font "sans 14" -wrap -buttons "La _pantalla:101,Una _ventana:102,El área _seleccionada:103" -default "El área _seleccionada" -geometry 590x118 "¿Qué quiere grabar?"
MODE=$?
[ $MODE -eq 1 ] && exit 1

gxmessage -title "Screencast" -name "SCREENCAST_MANAGER" -center -borderless -ontop -sticky -font "sans 14" -wrap -buttons "_No:100,_Sí:101" -default "_Sí" -geometry 590x118 "¿Quiere inluir audio?"
SOUND=$?
[ $SOUND -eq 1 ] && exit 1

RMD_OPTIONS=""

if [ "$MODE" == "102" ]; then
        RMD_OPTIONS=$(slop -t 9999999 -f "--windowid %i")
        [ $? -eq 0 ] || exit 1
fi

if [ "$MODE" == "103" ]; then
        RMD_OPTIONS=$(slop -c 1,0,0,0.5 -f "-x %x -y %y --width %w --height %h")
        [ $? -eq 0 ] || exit 1
fi

[ "$SOUND" == "100" ] && RMD_OPTIONS="$RMD_OPTIONS --no-sound"

FILENAME="$(_fileName)"

recordmydesktop $RMD_OPTIONS -o "$FILENAME"

seth · 2022-09-11 21:58:53

Override Redirect State: yes

Most override_redirect windows will be "dropdown_menu", "popup_menu", "tooltip", "notification", "combo", and "dnd" - not "normal".
So excluding "normal" "override_redirect" windows should do w/o significant side-effects?

ExoDoom · 2022-09-12 14:06:39

seth wrote:

Override Redirect State: yes
Most override_redirect windows will be "dropdown_menu", "popup_menu", "tooltip", "notification", "combo", and "dnd" - not "normal".
So excluding "normal" "override_redirect" windows should do w/o significant side-effects?

"window_type = 'normal' && override_redirect = true" did the trick. You are awesome, my good sir.

Arch Linux

#1 2022-09-11 11:26:54

[solved] Exclude recordmydesktop from picom shadows

#2 2022-09-11 11:42:39

Re: [solved] Exclude recordmydesktop from picom shadows

#3 2022-09-11 19:08:12

Re: [solved] Exclude recordmydesktop from picom shadows

#4 2022-09-11 21:58:53

Re: [solved] Exclude recordmydesktop from picom shadows

#5 2022-09-12 14:06:39

Re: [solved] Exclude recordmydesktop from picom shadows

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