[FFmpeg-user] I want to stream from my computer to be picked up by another device on my network.

[Padraig Hogan]

Hi,  I want to stream from my laptop what I see on my screen to another device on my network live. 
The other device can play files from the internet that look like this:  
http://portal.geniptv.com:8080/live#/abc1/abc2/19517.ts

I don't know whether it could use other protocols like udp:// or other file extensions but I wouldn't get my hopes up as it's a years old device that can't be updated (without potentially bricking it). 

I spent hours yesterday installing different streaming software none of which worked. I am just looking for a simple solution where I might give ffmpeg a command and it would do all I require. I have python installed as well fwiw but don't give me something complicated to do with it.  
I found the following page: 

StreamingGuide – FFmpeg


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StreamingGuide – FFmpeg


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and I tried one of the commands there and this was my input/output: 

Padraig>ffmpeg -f dshow -i video="screen-capture-recorder":audio="Stereo Mix (IDT High Definition" \ -vcodec libx264 -preset ultrafast -tune zerolatency -r 10 -async 1 -acodec libmp3lame -ab 24k -ar 22050 -bsf:v h264_mp4toannexb \ -maxrate 750k -bufsize 3000k -f mpegts udp://192.168.2.2:48550
ffmpeg version N-92510-gfa08345e88 Copyright (c) 2000-2018 the FFmpeg developers  built with gcc 8.2.1 (GCC) 20181017  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth  libavutil      56. 23.101 / 56. 23.101  libavcodec     58. 39.100 / 58. 39.100  libavformat    58. 22.100 / 58. 22.100  libavdevice    58.  6.100 / 58.  6.100  libavfilter     7. 46.100 /  7. 46.100  libswscale      5.  4.100 /  5.  4.100  libswresample   3.  4.100 /  3.  4.100  libpostproc    55.  4.100 / 55.  4.100[dshow @ 00000286df91bb40] Could not enumerate video devices (or none found).video=screen-capture-recorder:audio=Stereo Mix (IDT High Definition: I/O error


This should go without saying but if like me, you have no clue what to do then please don't respond. Also don't question what I am trying to do and say I should be trying to do something else because you'd be wrong. I'm sure I probably don't need to add that here but from past experiences there are lots of people out there like that and I would like to avoid all of that. 
Thanks for any constructive help.