Stefan Maier Hornet-C

## ffmpeg wav -> mp3
ffmpeg -i inputfile.wav -ab 320k outputfile.mp3

## ffmpeg_mkv_mp4_conversion.md

      
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                jamesmacwhite
                / ffmpeg_mkv_mp4_conversion.md
            
            
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              July 9, 2024 09:52
            
              
                Easy way to convert MKV to MP4 with ffmpeg
              
          
    Converting mkv to mp4 with ffmpeg

Essentially just copy the existing video and audio stream as is into a new container, no funny business!

The easiest way to "convert" MKV to MP4, is to copy the existing video and audio streams and place them into a new container. This avoids any encoding task and hence no quality will be lost, it is also a fairly quick process and requires very little CPU power. The main factor is disk read/write speed.
With ffmpeg this can be achieved with -c copy. Older examples may use -vcodec copy -acodec copy which does the same thing.
These examples assume ffmpeg is in your PATH. If not just substitute with the full path to your ffmpeg binary.
Single file conversion example


## luks.md

      
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                talaj
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              May 19, 2022 23:01
            
              
                Accessing an encrypted full disc image (LUKS;LVM)
              
          
    All honour goes to http://www.blaicher.com/2013/01/accessing-an-encrypted-full-disc-image-lukslvm/

So I typically use a full disc encryption with LVM over LUKS. So assume you have got an image from your harddisk via
dd if=/dev/sda of=image.img


## Install FreeNAS SCALE on a partition and create a mirror.md

      
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                gangefors
                / Install FreeNAS SCALE on a partition and create a mirror.md
            
            
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              July 6, 2024 01:31
            
              
                How to install TrueNAS SCALE on a partition instead of the full disk
              
          
    Install TrueNAS SCALE on a partition instead of the full disk

The TrueNAS installer doesn't have a way to use anything less than the
full device. This is usually a waste of resources when installing to a
modern NVMe which is usually several hundred of GB. TrueNAS SCALE will
use only a few GB for its system files so installing to a 16GB partition
would be helpful.
The easiest way to solve this is to modify the installer script before
starting the installation process.