This is ephemeral world, after all

Hi my blog audience, it’s been a long time I didn’t write here, did I? Actually there was nothing weird nor wrong here. I just quite discouraged to write posts in English then. For I have decided to fill this WordPress blog with English posts only. And in fact, I am still learning English as well, so you may find some glitches in this post and few others earlier.

A few days ago, more precisely on August 25, OpenShift by RedHat emailed me and many other developers around the world. They announced something tragic news, that they would suspend their valuable OpenShift online v.2. And it’s going to happen just in a month ahead (September 30, 2017). It’s kind of surprising and overwhelming, as we have to migrate our production apps that run on OpenShift into the newer generation of it that we might haven’t given it try yet. Continue reading This is ephemeral world, after all

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Kdenlive: Forcing Video Aspect Ratio to 16:9

This time, I’ll present a tutorial about video editing with Kdenlive, an awesome video editor for Linux. The tutorial is about how to force video aspect ratio to 16:9. Sometimes, we’ve got a recording of TV and it has a distorted aspect ratio. I mean, the resolution is not fully fit on screen, rather it’s 4:3 instead and has black boxes at the left and right side. So I will show you how to deal with it.

Please just check this out, even though it’s in Bahasa Indonesia. 🙂

Choosing the best version of Fedora app packages

Downgrading is something that looks scary. Come to think of it: come back to the past is something everyone afraid of, right? 😀 Nevertheless, sometimes downgrading is the option we want to choose when the current app is not working well, and there is no option to upgrade.

Recently I had VLC in Fedora that cannot stream from my Raspberry Pi DLNA server. The server is not listed on the UPNP playlist. While when I try VLC in Android, it could see the server. In the debug log message (CTRL+M), there were a couple of error messages, something like upnp services discovery: Initializing libupnp on '(null)'.

And actually, the workaround is simple: there is a feature of DNF to downgrade the working version of packages. In this case, the newest version of VLC that I installed from COPR repo cannot work with the latest libupnp version. Then I have to downgrade it to the previous version which fortunately still working.

sudo dnf downgrade libupnp

screenshot_20161227_214622

Dealing with Fedora firewall configuration

Fedora includes and enables firewall rules set by default. I mean –as an end user opinion– it’s not the same as Ubuntu. When I was using Ubuntu, everything just works, no hassle caused by firewall. Then when the first time I tried Fedora, there are a few restrictions created by firewall configuration. I’m not really understand firewall, though. But soon I learnt it.

TL;DR, at least I’ve got 3 hurdles in dealing with Fedora firewall default config. They are blocked by the config, i.e

  • Samba Share
  • KDE Connect
  • VLC UPNP / DLNA

By then, I put them as whitelist apps to be allowed in the Firewalld config manager. Then this day, I look again, and actually I totally disable the firewalld of systemd.

sudo systemctl disable firewalld

Another ending

Hallo Leute! Wie geht es Ihnen?

Wow, it’s been a while since my last post here. I just too lazy and dizzy to write post in English. So, I just procrastinated and on and on, until I realize that this is year end! Amazing!

Actually I have at least 3 drafts to be completed, but I don’t know why I stopped then. So instead, I wanna post this kind of junk post to tell the world that this blog is not dead, yet. Maybe I’ll publish them after this.

That’s all, I think. See you next year, that means 4 days left from now.

Ubuntu Mate 16.04 ARM

I used to write about Kubuntu when its new version was released. But for now, since my HDD is rather broken, and I have bought Raspberry Pi instead, so I want to write about Mate flavor of Ubuntu which fit to the ARM platform. Actually I want to install KDE on it, but I’m not sure about the performance.

Last month, the new long-term supported Ubuntu version was released. The main flavor with Unity has not yet brought awaited Unity 8 with Mir display server. And for my favorite flavor, Kubuntu, it has brought the newest KDE Plasma 5 for the desktop. Unfortunately I cannot play with it until I repair my PC. Maybe not only repairing, but also I ought to buy a new HDD as well.

Continue reading Ubuntu Mate 16.04 ARM

Odoo on Raspbian: Solving Wkhtmltopdf Error Code -6

Odoo is an open source ERP application for business, formerly known as OpenERP. Its core is Python and using PostgreSQL for the database. It’s a web-based app, so that you can install it on a server capable machine. In this case, I talk about Raspberry Pi 2, installed Raspbian Jessie.

By following a brief tutorial from here, I was successfully getting Odoo running on Raspberry Pi 2. But it still had a little glitch: when I want to create PDF report, it threw error:

 Wkhtmltopdf failed (error code: -6). Message: The switch –header-spacing, is not support using unpatched qt and will be ignored.The switch –header-html, is not support using unpatched qt, and will be ignored.The switch –footer-html, is not support using unpatched qt, and will be ignored.QXcbConnection: Could not connect to display. Continue reading Odoo on Raspbian: Solving Wkhtmltopdf Error Code -6