steven2358

FFmpeg cheat sheet

A list of useful commands for the FFmpeg command line tool.

Download FFmpeg: https://www.ffmpeg.org/download.html

Full documentation: https://www.ffmpeg.org/ffmpeg.html

Basic conversion

v-fox

By default Linux distros are unoptimized in terms of I/O latency. So, here are some tips to improve that.

The performance can be checked by:

• fio --name=read --readonly --rw={read/randread} --ioengine=libaio --iodepth={jobs_per_each_worker's_command} --bs={4k/2M} --direct={0/1} --numjobs=<number_of_parallel_workers> --runtime={10/30/60} --group_reporting --filename=/dev/nvme<device> - to simulate an optimized app;
• dd_rescue /dev/nvme<device> /dev/null -b {4k/2M} {-d} - to simulate a stupid app.

---

Appropriate settings are changed in appropriate places, such as:

• /etc/tuned/<custom-profile>/tuned.conf:

eNV25

Instructions to Update the BIOS/UEFI for an HP Laptop on Linux

To update the BIOS/UEFI firmware requires HP-specific files in the EFI System Partition, also referred to as ESP.

On a Linux system, the ESP is typically mounted on /boot/efi or /efi. Whithin you should also find a EFI directory, e.g. /boot/efi/EFI or /efi/EFI. This article assumes that the ESP is mounted on /efi and that the /efi/EFI directory exists. You can replace that with the mount point your system uses.

The HP-specific files are located in /efi/EFI/HP or /efi/EFI/Hewlet-Packard. These files typically come preinstalled in HP Windows PCs. If you have these files you could skip Install HP-specific files.

gmolveau

Firefox Dark Background

• How to change the background on Firefox to a dark one on new tab / loading screen ?

Procedure

• Type about:config in the URL bar
• Search toolkit.legacyUserProfileCustomizations.stylesheets and double-click the field to set it to true
• Type about:support in the URL bar
• Look for Profile folder field and click on the open button next to it.

tayvano

Originall From: Posted 2015-05-29 http://ubwg.net/b/full-list-of-ffmpeg-flags-and-options

This is the complete list that’s outputted by ffmpeg when running ffmpeg -h full.

usage: ffmpeg [options] [[infile options] -i infile]… {[outfile options] outfile}…

Getting help:
    -h — print basic options
    -h long — print more options
    -h full — print all options (including all format and codec specific options, very long)

Alee14

Installing Windows using CMD. (UEFI and BIOS Supported)

Guide created by Andrew Lee

Note that this guide does not go into detail, it's just providing the commands to install Windows.

Be cautions when doing this when dualbooting, please backup any existing data or you will lose them all.

Open CMD

First open CMD by pressing the following keys after booting into setup: Shift + F10

Creating Partition

rileyz

<#
.SYNOPSIS
    To import registry (.reg) file using pure PowerShell.


.DESCRIPTION
Intended Use

    This script was produced to assist with importing registry (.reg) files where the registry
    handlers, such as reg.exe or regedit.exe, are blocked from executing. 

mattlewissf

git add -p is your friend

git add -p is basically "git add partial (or patch)"

Patch mode allows you to stage parts of a changed file, instead of the entire file. This allows you to make concise, well-crafted commits that make for an easier to read history. This feature can improve the quality of the commits. It also makes it easy to remove parts of the changes in a file that were only there for debugging purposes - prior to the commit without having to go back to the editor.

It allows you to see the changes (delta) to the code that you are trying to add, and lets you add them (or not) separately from each other using an interactive prompt. Here's how to use it:

from the command line, either use

• git add -p

pratyakshm

Install Windows 11 on unsupported devices

Guide to install Windows 11 on any PC (does not involve ISO modifications) This guide will take you through a clean and simple way to install Windows 11 on your device by bypassing all requirements without doing any ISO modifications. Note: Guide shows fresh installation only.

Requirements:

1. ISO file (Link 1) (Link 2) (22000.65)
2. Rufus Microsoft Store GitHub Website
3. USB drive [8GB or more]

hachesilva

1. Hit ctrl+alt+esc
2. Hit Alt+F2, type r, and press Enter
3. Switch to another tty, for example tty6, by pressing Ctrl+Alt+F6
   Run:
   pkill -HUP -f "cinnamon --replace"
   Return to tty8 by pressing Ctrl+Alt+F8