Invalid MIT-MAGIC-COOKIE-1 Cannot open display :0.0+0,0

[ni3mm4nd]

Hello

I wanted to cast my screen but I'm getting error below:

$ echo $DISPLAY
:1
$ 

$ mkchromecast --video --screencast --resolution 720p
Mkchromecast v0.3.8.1
Starting Video Cast Process...
 * Serving Flask app "mkchromecast.video" (lazy loading)
PID of main process: 2026858
 * Environment: production
PID of streaming process: 2026861
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
 
List of Devices Available in Network:
-------------------------------------

Index   Types   Friendly Name 
=====   =====   ============= 
0 	Gcast 	MIBOX3
 
Casting to first device shown above!
Select devices by using the -s flag.
 
MIBOX3
 
 
Information about  MIBOX3
 
DeviceStatus(friendly_name='MIBOX3', model_name='MIBOX3', manufacturer='Unknown manufacturer', uuid=UUID('4f7a9f95-e654-3871-0f35-3ee111e7d0e8'), cast_type='cast')
 
Status of device  MIBOX3
 
CastStatus(is_active_input=True, is_stand_by=False, volume_level=0.20000000298023224, volume_muted=False, app_id=None, display_name=None, namespaces=[], session_id=None, transport_id=None, status_text='', icon_url=None)
 
The IP of MIBOX3 is: 192.168.88.169
Your local IP is: 192.168.88.207
 
The media type string used is: video/mp4
 
Cast media controller status
 
CastStatus(is_active_input=True, is_stand_by=False, volume_level=0.20000000298023224, volume_muted=False, app_id=None, display_name=None, namespaces=[], session_id=None, transport_id=None, status_text='', icon_url=None)
 
Remember to open pavucontrol and select the mkchromecast sink.

Ctrl-C to kill the Application at any Time

ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Invalid MIT-MAGIC-COOKIE-1 key[x11grab @ 0x563dd3fd9980] Cannot open display :0.0+0,0, error 1.
:0.0+0,0: Input/output error
192.168.88.169 - - [11/Mar/2021 20:12:33] "GET /stream HTTP/1.1" 200 -

Unfortunately I didn't find any flag to correctly set right display which is not :0.0 which is I guess somewhere hardcoded.

[Onion2222]

same problem

[BlueDrink9]

The git version seems to have an option to fix this.

mkchromecast/mkchromecast/__init__.py

Line 192 in 37dc39d

parser.add_argument(

[develeon]

I get the same on version:
mkchromecast v0.3.8.1

x11grab works:
ffmpeg -video_size 1920x1080 -framerate 30 -f x11grab -i :1 -c:v libx264 -qp 0 -preset ultrafast capture.mkv

Tried mkchromecast:
Added firewall rule : sudo ufw allow 5000

xhost  + 
DISPLAY=:1 mkchromecast -s --control --notifications \
--video --screencast \
--resolution 1080p \
--encoder-backend ffmpeg \ 
--command 'ffmpeg -f lavfi -i anullsrc -f x11grab -r 25 -s 1920x1080 -i :0.0+0,0 -vcodec libx264 -preset ultrafast -tune zerolatency -maxrate 10000k -bufsize 20000k -pix_fmt yuv420p -g 60 -f mp4 -max_muxing_queue_size 9999 -movflags frag_keyframe+empty_moov pipe:1'

But fails with Invalid MIT-MAGIC-COOKIE-1 as well :

ffmpeg version 4.2.7-0ubuntu0.1 Copyright (c) 2000-2022 the FFmpeg developers
                                                                               built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
                                                                                                                                 configuration: --prefix=/usr --extra-version=0ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
                                                          libavutil      56. 31.100 / 56. 31.100
                                                                                                  libavcodec     58. 54.100 / 58. 54.100
                                                                                                                                          libavformat    58. 29.100 / 58. 29.100
               libavdevice    58.  8.100 / 58.  8.100
                                                       libavfilter     7. 57.100 /  7. 57.100
                                                                                               libavresample   4.  0.  0 /  4.  0.  0
                                                                                                                                       libswscale      5.  5.100 /  5.  5.100
            libswresample   3.  5.100 /  3.  5.100
                                                    libpostproc    55.  5.100 / 55.  5.100
                                                                                          Invalid MIT-MAGIC-COOKIE-1 key[x11grab @ 0x55c73d111980] Cannot open display :0.0+0,0, error 1.
:0.0+0,0: Input/output error
192.168.54.8 - - [11/Jan/2024 22:02:09] "GET /stream HTTP/1.1" 200 -

Seems DISPLAY is hardcoded, 'Cannot open display :0.0+0,0, error 1' ^

echo $DISPLAY
:1

And --display seems not to be an invalid cli-argument:

mkchromecast: error: unrecognized arguments: --display

Others encoders give blank/dark screen and or 'default media Receiver' with tray option.

Seems best workaround is using chrome browser casting by now :/