LoukMouk's questions

I followed these steps to install Vert.x on my machine.

• Intall OpenJDK : sudo apt-get install openjdk-8-jdk

• Test java installation: java -version which is giving me 3 outputs:

  1. openjdk version "1.8.0_242"
  2. OpenJDK Runtime Environment (build 1.8.0_242-8u242-b08-0ubuntu3~18.04-b08)
  3. OpenJDK 64-Bit Server VM (build 25.242-b08, mixed mode)

• Download latest version of Vert.x at https://vertx.io/

• Untar the downloaded file: tar xzvf vert.x-3.8.5-full.tar.gz
• Make vertx executable: chmod +x vertx/bin/vertx
• Go in the bin folder: cd vertx/bin
• Test Vert.x version: ./vertx version which is giving me 3.8.5 as output

I then created a .java file with the following code in it:

import io.vertx.core.AbstractVerticle;
import io.vertx.core.eventbus.EventBus;

public class Producteur extends AbstractVerticle 
{
    public void start() throws Exception
    {
        System.out.println("> Launching...");

        final EventBus eb = vertx.eventBus();

        vertx.setPeriodic(1000, v -> {

            eb.send("canal-ptp", "Hello", reply -> {

                if(reply.succeeded())
                    System.out.println("> Response received : " + reply.result().body());
                else
                    System.out.println("> No response!");
            });
        });
    }
}

This code is working fine when launch with the following command is a terminal:

./vertx run Producteur.java --cluster

But when I add the following import at the beginning of the java file:

import io.vertx.core.json;

I get the following error:

What am I missing? I don't get why the other imports are fine, but this one isn't. In the end, I'd like to replace the "Hello" string with a json object.

Please note that I'm a complete noob with ubuntu/java/vertx overall. Thanks!

I would like to know if there is any plugins and/or utilities that could make my life MUCH MORE easier.

When moving from folder to folder through console, I can use the Tab key on my keyboard to autocomplete a folder, look for a folder (double tap) or simply to express that I want to go "forward" with my searches.

When coding, the Tab key is used to "push" the code "forward" or to the right. To "pull" the code "backward", you can use the combination of Shift+Tab keys.

Is there an equivalent for, as an example, pressing the Shift+Tab keys to write ../ in the console for me? Or to let me know I'm at the root level and that I can't go "backward" anymore?

Examples of usage:

Case 1:

user@server:/$ cd ~/Desktop/folder1/

after Shift+Tab

user@server:/$ cd ~/Desktop/(Remove the last written folder. No more backspace spam!! :D )

Case 2:

user@server:/$ cd

after Shift+Tab

user@server:/$ cd (Because I'm at root and can't go back)

Case 3:

user@server:/home/Desktop/folder1$ cd

after Shift+Tab

user@server:/home/Desktop/folder1$ cd ../ (Because I can go back to Desktop)

I know that sounds lazy. I know I'm lazy.

Anyways, thanks for the suggestions! (:

Edit: Just to be clear. I gave as an example the cd command, but what I want could be applied to any command/executable. It would be considered a basic use just like Tab is used to autocomplete.

I have an ubuntu desktop vm on VMware workstation.

I can connect to it with one of my user. Here LoukMouk.

When I try to use the option switch user situated at the top right corner of the GUI, it doesn't send me to the page to choose what user I want to connect as... Its like it only locks my session waiting for me to enter my password.

I don't know why... This doesn't always happen, sometimes, when I try a second/third time, it finaly shows me the selection...

Is it possible that my limited amount of ram could prevent me from opening a second session? I mean... It works sometimes... I'm confused.

Am I the only one having this issue? (:

I'm currently trying to setup a Ubuntu server to redistribute a rtsp feed coming from an ip camera.

I saw that the gst-rtsp-server library of gstreamer could help me with this issue.

I installed the following package:

sudo apt-get install libgstrtspserver-1.0-dev
sudo apt-get install gstreamer1.0-rtsp
sudo apt-get install libglib2.0-dev

I then cloned the gst-rtsp-server library repo on my desktop:

git clone https://github.com/GStreamer/gst-rtsp-server.git

But, when I try to compile a C file (gst-rtsp-server/examples/test-launch.c) given as an example of how to use the library using gcc:

gcc test-launch.c -I/usr/include/gstreamer-1.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include

I get the following error:

/tmp/ccM7e45N.o: In function `main':
test-launch.c:(.text+0x2e): undefined reference to `g_option_context_new'
test-launch.c:(.text+0x4a): undefined reference to `g_option_context_add_main_entries'
test-launch.c:(.text+0x4f): undefined reference to `gst_init_get_option_group'
test-launch.c:(.text+0x61): undefined reference to `g_option_context_add_group'
test-launch.c:(.text+0x79): undefined reference to `g_option_context_parse'
test-launch.c:(.text+0x99): undefined reference to `g_printerr'
test-launch.c:(.text+0xa5): undefined reference to `g_option_context_free'
test-launch.c:(.text+0xb1): undefined reference to `g_clear_error'
test-launch.c:(.text+0xc7): undefined reference to `g_option_context_free'
test-launch.c:(.text+0xd6): undefined reference to `g_main_loop_new'
test-launch.c:(.text+0xdf): undefined reference to `gst_rtsp_server_new'
test-launch.c:(.text+0x107): undefined reference to `g_object_set'
test-launch.c:(.text+0x113): undefined reference to `gst_rtsp_server_get_mount_points'
test-launch.c:(.text+0x11c): undefined reference to `gst_rtsp_media_factory_new'
test-launch.c:(.text+0x13a): undefined reference to `gst_rtsp_media_factory_set_launch'
test-launch.c:(.text+0x14b): undefined reference to `gst_rtsp_media_factory_set_shared'
test-launch.c:(.text+0x162): undefined reference to `gst_rtsp_mount_points_add_factory'
test-launch.c:(.text+0x16e): undefined reference to `g_object_unref'
test-launch.c:(.text+0x17f): undefined reference to `gst_rtsp_server_attach'
test-launch.c:(.text+0x19a): undefined reference to `g_print'
test-launch.c:(.text+0x1a6): undefined reference to `g_main_loop_run'
collect2: error: ld returned 1 exit status

There's something I'm missing but I don't know what... ><'

The error is obviously coming from a missing header, but which one and where can I get it?

As always, thanks for the help/tips!

I created a brand new Ubuntu vm with beaver GUI but can't install wireshark on it.

I used the steps provided on this answer to get wireshark from ppa, but I get errors of dependencies or something...

STEPS:

$ sudo add-apt-repository ppa:wireshark-dev/stable
$ sudo apt-get update
$ sudo apt-get install wireshark

ERRORS:

EDIT 1: I tried to install wireshark-qt but I get the same type of error...

EDIT 2: I tried solutions from this post, but none seem to help my case.

$ sudo apt-get autoremove
$ sudo apt-get update

Related to this post (read first for context)

I managed to manually compile the gst-rtsp-server.

I then tried to use the test-launch example given within the github repo I cloned.

$ cd (myRepo)/gst-rtsp-server/examples
$ ./test-launch "( videotestsrc ! x264enc ! rtph264pay name=pay0 pt=96 )"

I then downloaded VLC media player and launched it within a terminal, but when I try to play the resulting stream rtsp://127.0.0.1:8554/test, I get errors.

Am I doing something wrong?

Why can't VLC connect to my rstp server and stream what's diffused(the test video)?

I am trying to make a rtsp server that can catch a rtsp feed from a onvif camera and then redistribute this stream to everyone that connects to my server.

I created a new Ubuntu 64-bit vm on VMware Workstation using this iso: https://www.ubuntu.com/download/desktop/thank-you?version=18.04.1&architecture=amd64

I then installed ubuntu-desktop:

$ sudo apt-get update
$ sudo apt-get install ubuntu-desktop
$ reboot

I cloned the gst-rtsp-server from its github repository to a folder on my desktop:

$ cd Desktop
$ mkdir camSrv
$ cd camSrv
$ git clone https://github.com/GStreamer/gst-rtsp-server.git

I then installed the dependency referenced by this post:

$ sudo apt-get install autoconf -y
$ sudo apt-get install automake -y
$ sudo apt-get install autopoint -y
$ sudo apt-get install libtool -y

but when i try to build the gst-rtsp-server project, I keep getting errors...

I installed a bunch of other dependencies, but now I'm stuck at the error:

configure: No package 'gstreamer-1.0' found
configure: error: no gstreamer-1.0 >= 1.15.0.1 (GSTreamer) found

I can't find what i'm missing... all i want is to make the example mentioned in this post work for me...