Capture area at position outside the screen size.

[StefanPahlplatz]

System: OS: Ubuntu 17.10 on Xorg
Resolution: 1280x1024 (screen 2), 1920x1080 (screen 1)
Green Recorder: 3.1
Error: [x11grab @ 0x559e2a8cf7a0] Capture area 1892x1066 at position 1257.60 outside the screen size 3200x1080 :1+1257,60+1395,162+1267,61+1268,67+1303,20: Invalid argument

Steps to reproduce:

1. Drag green recorder to screen 2.
2. Click "Select an Area".
3. Select a large region on screen 1.
4. Save, it says it saved the position successfully.
5. Click the record button.

Notes:
While making sure this was a bug and not a mistake on my part I noticed that it depends on the size of the area that you select. If I select a small region in the centre of my screen it works, but once I make it fullscreen or a big area (still on 1 screen) it gives me the error.

Full log:

You are recording on: x11
Gtk-Message: Failed to load module "unity-gtk-module"
ffmpeg version 3.3.4-2 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.2.0-8ubuntu2)
  configuration: --prefix=/usr --extra-version=2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  WARNING: library configuration mismatch
  avcodec     configuration: --prefix=/usr --extra-version=2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc --enable-netcdf
  libavutil      55. 58.100 / 55. 58.100
  libavcodec     57. 89.100 / 57. 89.100
  libavformat    57. 71.100 / 57. 71.100
  libavdevice    57.  6.100 / 57.  6.100
  libavfilter     6. 82.100 /  6. 82.100
  libavresample   3.  5.  0 /  3.  5.  0
  libswscale      4.  6.100 /  4.  6.100
  libswresample   2.  7.100 /  2.  7.100
  libpostproc    54.  5.100 / 54.  5.100
[x11grab @ 0x56466b1ce7a0] Capture area 1920x1053 at position 1346.50 outside the screen size 3200x1080
:1+1346,50+1280,27: Invalid argument

[mhsabbagh]

Green Recorder doesn't support multiple screens setup. Probably won't for a time.

[mikolajpp]

I have single screen, also hit this bug. This is independend of screen number, I hit this every time i make capture area slightly bigger...

[mikolajpp]

There is clearly some issue with how position of capture area is calculated. Sometime when I randomly move the capture window the bug disappears.