[FFmpeg-trac] #4574(avdevice:new): The x11grab input refuses to capture the full screen claiming the capture area is outside the screen size

[FFmpeg]

#4574: The x11grab input refuses to capture the full screen claiming the capture
area is outside the screen size
----------------------------------+--------------------------------------
             Reporter:  es        |                     Type:  defect
               Status:  new       |                 Priority:  important
            Component:  avdevice  |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
----------------------------------+--------------------------------------
 It  seems the the following commit broke fullscreen recording with
 x11grab:
 http://git.videolan.org/?p=ffmpeg.git;a=commit;h=9ccaeff67a3b0f75f7f25c39c5d373b560dcfb19

 How to reproduce:
 {{{
 $ xrandr
 Screen 0: minimum 8 x 8, current 1280 x 720, maximum 32767 x 3276
 [...]

 $ ffmpeg -f x11grab -framerate 30 -threads 0 -s 1280x720 -i :0 capture.mp4
 [x11grab @ 0x16a0a60] Capture area 1280x720 at position 0.0 outside the
 screen size 1280x720
 :0: Invalid argument

 $ ffmpeg -version
 ffmpeg version 2.6.3 Copyright (c) 2000-2015 the FFmpeg developers
 built with gcc 4.9.2 (GCC) 20150304 (prerelease)
 configuration: --prefix=/usr --disable-debug --disable-static --disable-
 stripping --enable-avisynth --enable-avresample --enable-fontconfig
 --enable-gnutls --enable-gpl --enable-libass --enable-libbluray --enable-
 libfreetype --enable-libfribidi --enable-libgsm --enable-libmodplug
 --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb
 --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-
 libschroedinger --enable-libspeex --enable-libssh --enable-libtheora
 --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264
 --enable-libx265 --enable-libxvid --enable-shared --enable-version3
 --enable-x11grab --enable-libfdk_aac --enable-nonfree
 libavutil      54. 20.100 / 54. 20.100
 libavcodec     56. 26.100 / 56. 26.100
 libavformat    56. 25.101 / 56. 25.101
 libavdevice    56.  4.100 / 56.  4.100
 libavfilter     5. 11.102 /  5. 11.102
 libavresample   2.  1.  0 /  2.  1.  0
 libswscale      3.  1.101 /  3.  1.101
 libswresample   1.  1.100 /  1.  1.100
 libpostproc    53.  3.100 / 53.  3.100
 }}}

 These lines in libavdevice/xcbgrab.c
 {{{
     if (c->x + c->width >= geo->width ||
         c->y + c->height >= geo->height) {
 }}}
 should be changed to
 {{{
     if (c->x + c->width > geo->width ||
         c->y + c->height > geo->height) {
 }}}
 which fixes the problem for me.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4574>
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