Debian-Testing

How to merge sound and video in FFmpeg. This is very helpful sometimes.

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To merge a Video file and an audio file, only FFmpeg is required. I needed the audio from one other video, I ripped it like this. ffmpeg -i Online-1.mp4 -vn -acodec copy output-audio.aacffmpeg -i Online-1.mp4 -vn -acodec copy output-audio.aac Then I could use this command to merge the aac audio with a silent video to … Read more

Record a window in Ubuntu easily with the OBS studio application. This is very easy.

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Recording a window with OBS is very easy, this allows easy streaming and recording of gameplay or a video window. The screenshot above shows an OBS studio window displaying a video window, you select the window by double-clicking the Window Capture (Xcomposite) 2 option. This brings up another dialogue to select any open window on … Read more

Companies using virtualization to empower their business.

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Companies and institutions using virtualization There are many companies using virtualization. One is the University of Arkansas. This campus has facilitated new distance learning and resource sharing approaches by deploying virtual virtual systems on an IBM zEnterprise mainframe that may be used for student exercises. Another example is Transzap. This is an ePayment and data … Read more

Interesting command line tricks on Windows.

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There are quite a few interesting command-line tricks for Windows. Create a folder named CON. This is quite difficult to delete. echo "hello" > \\.\C:\Users\shawn\Documents\CONecho "hello" > \\.\C:\Users\shawn\Documents\CON Another interesting trick is one. C:\Users\Dyatlov\Downloads\testing>echo "" > ….::$INDEX_ALLOCATION The system cannot find the file specified.C:\Users\Dyatlov\Downloads\testing>echo "" > ….::$INDEX_ALLOCATION The system cannot find the file specified. This … Read more

How to use FFmpeg to get a slow-motion video clip.

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Making a slow-motion clip from a video can be very useful to show off what is happening in a certain scene. The example below will make a slow-motion clip from a video file. This would be another very useful FFmpeg tip. > ffmpeg -i qS_lu5dKo9A2qoNW.mp4 -c:v libvpx -b:v 3200k -filter:v "setpts=2.0*PTS" -ss 00:00:03 -t 6.9 … Read more

How to properly brighten a video file with FFmpeg.

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Making a video file brighter is very easy, this can be done with FFmpeg. The curves filter can easily brighten a video file without causing much degradation at all. Use this example to make a video file a bit brighter and it will still be the same quality. ffmpeg -i -i underground-war.mp4 -vf "curves=all=’0/0 0.4/1 … Read more

Theme your Gnome or MATE desktop in interesting ways.

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The MATE desktop that comes with Ubuntu is very amenable to customization. One cool theme idea is to try and make it look like Windows. There are Windows Vista icons that are very nice. They can improve the look of your desktop a lot. Download them here: https://www.securitronlinux.com/linux/files/Vista.tar.gz. That would be a great icon theme … Read more

Performing forensics on files with Linux.

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There are many ways to find files embedded inside other files, one way is using binwalk to find embedded files inside another file. This is how to use binwalk to list all embedded files inside a larger one. This takes a while with a multi-gigabyte file, but it does work. ┌──[[email protected]]─[/mnt] └──╼ ╼ $ binwalk … Read more

More fun with FFmpeg. How to reverse video colors in interesting ways.

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FFmpeg allows interesting video manipulation. This includes inverting the colours of video files. The example below will invert the colours of a video file. ┌──[[email protected]]─[~/Videos/titles] └──╼ ╼ $ ffmpeg -i zombiestrain.avi -vf lutrgb="r=negval:g=negval:b=negval" zomby.avi┌──[[email protected]]─[~/Videos/titles] └──╼ ╼ $ ffmpeg -i zombiestrain.avi -vf lutrgb="r=negval:g=negval:b=negval" zomby.avi This is an example of what this filter will give you. This … Read more

How to mount an Xbox formatted drive on Ubuntu.

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Mounting an HDD formatted with the Xbox filesystem can be a pain, but it can be done. Run this command in the terminal to get the filesystem offset of the current filesystem. ┌──[[email protected]]─[~] └──╼ ╼ $ sudo head -c 4k /dev/sdg | grep -aobuP ‘\x00\x00\x00NTFS’ | sed ‘s/\:.*//’ 2048┌──[[email protected]]─[~] └──╼ ╼ $ sudo head -c … Read more

How to have a much wider scrollbars in Firefox on Debian.

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The scrollbars on Firefox are very narrow and annoying, but this may be fixed. This is how to get wider scrollbars in Firefox when using Linux. The best way is to edit the about:config and then look for this entry. widget.non-native-theme.gtk.scrollbar.thumb-sizewidget.non-native-theme.gtk.scrollbar.thumb-size Change this to 1.50 and this makes the scrollbar much wider. Also this setting. … Read more

How to make your Linux desktop look like iOS easily. This looks very nice.

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There are some very nice themes out there to stylize your Linux desktop, the trendy Linux user may install a theme and make the Linux Gnome desktop look like iOS. This is very easy. iOS 10 theme for Gnome Shell and MATE. https://www.opendesktop.org/p/1220826/. Download this theme and place it under your ~/.themes folder. Then enable … Read more

Different types of networking attacks and techniques.

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Footprinting Footprinting is defined as the process of gathering information on computer systems and networks. This is the first step in information gathering and provides a useful insight into the network you are planning to attack. Zero-day exploits These are exploits that are found before there are patches for these problems. These can cause many … Read more