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Category Archives: Linux

Edit RAW photos in Linux

These days most digital SLR cameras include the ability to shoot in RAW, an uncompressed image format that gives you great control over a number of photographic variables. This can vary from the basics like white balance and exposure; to curve adjustment, lens vignetting and more.

If you’ve bought a digital SLR camera in the last 3 years or so, there’s a good chance it can capture photos in the RAW image format. Depending on the size of your camera’s sensor, these files can be roughly two to three times the size of your average high quality JPEG.

Whilst it is possible to open JPEG files in some RAW editors, the compression and lack of data stored within a JPEG simply does not compare it to RAW. If your camera does shoot RAW and you haven’t experimented yet then I’d urge you to give it a go.

Once you’ve transferred your RAWs to your computer, you’ll need an editor. With an editor you can change (within reason) most aspects of your photographs in a way JPEG doesn’t allow. Speaking from experience, it’s amazing how well some of your worst shots scrub up after a 10 minute edit!

An incredibly powerful RAW editor, Photivo handles nearly every RAW format and BMP files with startling ease. The interface could do with some work, but with literally hundreds of processing techniques at your disposal it’s clear that the open-source project is being taken in the right direction.

If you’re a fan of GIMP for your photo editing (and let’s face it, using Linux you don’t exactly have a choice) then you’ll also like the way Photivo is able to send modified photos directly to GIMP for retouching.

The developers claim that Photivo uses the most advanced image manipulation algorithms available, though this powerful and complex tool is geared more towards power users and those with prior RAW experience, rather than complete newbies.

Ubuntu install, in Terminal:

sudo add-apt-repository ppa:dhor/myway
sudo apt-get update
sudo apt-get install photivo

In case you face any issues, let me know. Cheers!

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Posted by on August 24, 2015 in Linux

 

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Error of hevc file format in VLC

Just you have chosen a good mоvie to watch, you are seated comfortably in an armchair with pack of popcorn, clicked on your favorite media player VideoLAN and… bang! Error!

VLC does not support the audio or video format “hevc”. Unfortunately there is no way for you to fix this.

The error message above is not really correct. There is a way to fix it! All you need is libde265  – an open source implementation of the h.265 video codec. The easiest way to install it on your computer is to add the corresponding PPA that contains Ubuntu packages of the libde265 library, plugins for the GStreamer framework, VLC and required dependencies. Just open the terminal (Ctrl + Alt + T) and type the following commands:

This will add the PPA repository:

sudo apt-add-repository ppa:strukturag/libde265
sudo apt-get update

…and this will install VLC plugin:

sudo apt-get install vlc-plugin-libde265

The solution described above to open mkv file with H.265 HEVC codec is working perfectly for me on Ubuntu 14.04. If you have troubles with it, you can try to disable the Universe repository and add the PPA djcj/vlc-stable in order to install the latest stable VLC version.

In a terminal run this command

add-apt-repository ppa:djcj

Then open Synaptic as Administrator:

sudo synaptic

Go to Settings -> Repositories and uncheck the Universe repo.

Restart your player and enjoy the movie!

 
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Posted by on May 5, 2015 in Linux

 

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Turning on Bluetooth in Ubuntu 12.04

I am using Ubuntu 12.04 and wanted to transfer a few files from my laptop to cell phone. One way of doing this was to transfer files using Bluetooth. I turned on bluetooth from the title bar. Then I tried to turn Visibility on. Somehow that did not happen. If this happens with you, open terminal ( Ctrl + Alt + T ) and type this command

sudo hciconfig hci0 reset

Screenshot from 2012-12-04 22:08:30

 

Cheers! 🙂

 
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Posted by on December 4, 2012 in Linux

 

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