tutorials

Posted on by Jean-Luc Aufranc (CNXSoft) - 11 Comments on How-to Setup a DLNA/UPnP Server in Linux for Smoother Video Streaming with Kodi and Other Media Players

How-to Setup a DLNA/UPnP Server in Linux for Smoother Video Streaming with Kodi and Other Media Players

I’m normally playing videos from a SAMBA share installed in a Ubuntu PC to play files from Kodi in Android TV box reviews, but sometimes when I use 10/100 Ethernet, or worse WiFi local “streaming” may not be as smooth as possible. SAMBA is convenient because of access control and read write operations, but if you want to get a bit more performance, you may switch to NFS instead, or like I’ve going to show you here to a DLNA / UPnP server to stream videos locally from Kodi 16.1. There are several options, but MiniDLNA is lightweight compared to MediaTomb, so it will also run on lower end hardware like cheap ARM Linux development boards like Raspberry Pi, Orange Pi, or NanoPi NEO without taking too many resources. Installation is very easy in Debian / Ubuntu distributions, and I supposed this should also work with Windows Subsystem for Linux […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 9 Comments on How to Resolve Slow Boot Times in Ubuntu 16.04

How to Resolve Slow Boot Times in Ubuntu 16.04

I’ve recently upgraded my machine from Ubuntu 14.04.4 to Ubuntu 16.04.1, but while my computer used to boot in about 40 seconds, after the upgrade boot times increased considerably to 2 to 3 minutes. The first easy check was to look at dmesg:

There’s a bit 87 seconds gap between checking for the floppy, and VirtualBox drivers loading. So there’s definitely an issue here, but the log does not exactly give a clear queue. I’ve read you could use systemd-analyze to find which process(es) may be slowing down your computer at boot time:

Two processes are taking close to 8 seconds, but those 16 seconds still do not explain why it takes 2 minutes more to boot…Eventually, I realized systemd-analyze has a few more tricks up its sleeves:

The first command shows there’s no problem with the kernel itself, and something is slow in user space. The […]

Posted on by Karl Johnson - 116 Comments on How to Customize Amlogic Android Firmware – A Tutorial with NEXBOX A95X (S905) TV Box

How to Customize Amlogic Android Firmware – A Tutorial with NEXBOX A95X (S905) TV Box

CNXSoft: Bear in mind that there are multiple versions of Nexbox A95X. Yesterday, I published the review of Nexbox A95X with Android 6.0, with the model based on Amlogic S905X processor. In this article, Karl had a look at Nexbox A95X with Amlogic S905 processor, which he purchased a couple of months ago, but since he was not happy with the Android 5.1 firmware, he decided to customize it. Karl here with a review of the Nexbox A95X S905 box. This took a while to even start. I received the box about 2 months ago and I dived right in and broke it. I didn’t have factory firmware, and wasn’t cautious enough and bricked it. I found some firmware that worked but it didn’t work very well for me. Email’s to Nexbox directly didn’t help and I was stuck with a bricked box… I later found someone who had factory […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 1 Comment on Embedded Android (Marshmallow) and Brillo / Weave Internals Presentation Slides

Embedded Android (Marshmallow) and Brillo / Weave Internals Presentation Slides

Karim Yaghmour – founder of Opersys, a company specializing in Embedded Linux and Android training and development – is currently at Android Devcon 2016 were he gave a full day Embedded Android Workshop on August 1st, as well as a separate 1+ hour talk about Brillo/Weave internals on August 2, and more talks scheduled on the next two days about Android memory management, debugging and development, and Project Ara. He has just released the presentation slides on Slideshare, with the first “Embedded Android Workshop with Marshmallow” presentation totaling 175 pages, and dealing with Linux and Android concepts, overall architecture, system startup, the Linux kernel, hardware support, native user-space, Java for Android, JMI, AOSP, and more… The second presentation is much shorter with 29 slides, and deals specifically with Brillo / Weave internals including Embedded Linux, Android, Binder, DBUS, HAL, the source tree architecture, and so on. While you’d probably learn […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 23 Comments on How to Set an Android TV Box Video Output to Portrait Mode

How to Set an Android TV Box Video Output to Portrait Mode

Most buyers who buy an Android TV box just want to use it to watch videos, browse the web, play games, and so on, so landscape mode seems to be the best choice, and the orientation option in the firmware is often disabled. However, TV boxes can also potentially be used as digital signage players, which may require landscape or portrait modes if the screen is positioned vertically. Since I’ve just been asked that question, I’ve checked for a solution, and luckily there’s an app called Set Orientation that does the job. [Update August 2021: The app has been removed from the Google Play store, it might be worth trying Screen Rotation Control app instead] When you first start the app, it will show the option “Disabled”, but you can click on the arrow to reveal more options, and select Portrait to rotate the screen. In case the screen is […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 40 Comments on Getting Started with NanoPi NEO Development Board – Ubuntu Core Firmware

Getting Started with NanoPi NEO Development Board – Ubuntu Core Firmware

NanoPi NEO is an exciting ARM Linux board due to the power it packs into its small size, and its low price starting at $7.99. It’s made by FriendlyARM, and since I’ve read some people had never heard about the company before, I’d like to point out it has been providing development boards well before the Raspberry Pi board was launched, with products such mini2440 based on a Samsung ARM9 processor introduced around year 2010. Anyway, I asked the company if they were willing to send 2 samples for review, as I plan to remove the USB & Ethernet port on one of them. Instead I got a 4 boards and accessories, so I’m going to start reviewing the board by writing a quick start guide, showing how to setup it, and check out the Ubuntu core provided by the company. If you are a fan of armbian made Debian […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 8 Comments on Setting a VoIP SIP user agent with Embedded Linux

Setting a VoIP SIP user agent with Embedded Linux

This is a guest post by Leonardo Graboski Veiga, working for Toradex. Introduction This article’s main goals are: to cross-compile the PJSIP libraries and the PJSUA API reference implementation; deploy it to the target system; give an overview about the SIP protocol; and explore the reference implementation features, regarding audio only. For this purpose, a Computer on Module (CoM) from Toradex was chosen in the following configuration: Colibri iMX6DL* + Colibri Evaluation Board. The evaluation board and CoM are displayed in Figures 1 and 2, respectively.   VOIP or Voice over IP, is a term designed to refer to a set of methods and technologies targeted for the implementation of telephony services over the Internet. For the purpose of this article, the scope will be limited to the use of a reference implementation built upon the SIP communication handling protocol by means of the PJSIP libraries and PJSUA2 API. If […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 3 Comments on Lepton Image Compression Achieves 223 Lossless Compression of JPEG Images (on Average)

Lepton Image Compression Achieves 22% Lossless Compression of JPEG Images (on Average)

Dropbox stores billions of images on their servers, most of them JPEGs, so if they can reduce the size of pictures it can have a big impact on their storage requirements, so the company developed Lepton image compression, which – on average – achieved 22% lossless compression on the images stored in their cloud. Compression and decompression speed is also important, since the files are compressed when uploaded and uncompressed on the fly when downloaded so that the complete process is transparent to the end users, who only see JPEG photos, and the company claims 5MB/s compression, and 15MB/s compression, again on average. The good news is that the company released Lepton implementation on Github, so in theory it could also be used to increase the capacity of NAS which may contain lots of pictures. So I’ve given it a try in a terminal window in Ubuntu 14.04, but it […]

Exit mobile version