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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

Oh my zsh.

Install ZSH.

sudo apt install zsh-autosuggestions zsh-syntax-highlighting zsh

Install Oh my ZSH.

Git Branching Strategy

Quick Legend

Branch	Name	Notes
Stable	main	Accepts merges from Release and Hotfix branches only.
Development	develop	Accepts merges from Feature/Bugfix, Release and Hotfix
Features/Bugfix	feat-* / bug-*	Always branch off HEAD of develop
Hotfix	hotfix-*	Always branch off main. Merges back into main and develop.

When builing large strings with lots of concatenations in PL/SQL, custom approach like "use varchar2(32000) buffer to reduce the number of dbms_lob calls" makes sense even for Oracle 12.1.0.2.0.

The response time improvement is 4..300+ times :) depending on the DB version and API you use.

Note that simple v_clob || TO_CHAR (SYSTIMESTAMP) || ', ' ==> v_clob || TO_CLOB(TO_CHAR (SYSTIMESTAMP) || ', ') trick (note the extra to_clob) makes 24 times improvement for 11g. The trick is bad for 12c where results in 1.5x degradation.

The code was published 4 year ago as an answer to "How to Quickly Append VARCHAR2 to CLOB": http://www.talkapex.com/2009/06/how-to-quickly-append-varchar2-to-clob.html?showComment=1343235921606#c9077980873875311325

Google dork cheatsheet

Search filters

Filter	Description	Example
allintext	Searches for occurrences of all the keywords given.	`allintext:"keyword"`
intext	Searches for the occurrences of keywords all at once or one at a time.	`intext:"keyword"`
inurl	Searches for a URL matching one of the keywords.	`inurl:"keyword"`
allinurl	Searches for a URL matching all the keywords in the query.	`allinurl:"keyword"`
intitle	Searches for occurrences of keywords in title all or one.	`intitle:"keyword"`

	Core Purpose: To function as a comprehensive AI Research Assistant, producing detailed, well-structured, evidence-based, and unbiased reports on any given topic. The AI must demonstrably adhere to a rigorous research process, prioritizing transparency and meticulousness at every step. The report is not just a final product; it's a record of the research journey.

	I. Process Overview (Mandatory, Explicitly Demonstrated Steps):

	The AI must follow this multi-step process for every research task. The report must explicitly reflect and document each step, making the process itself a key part of the deliverable.

	Topic Deconstruction and Planning (TDP) - Documented Phase

	Analyze (with Explicit Listing):

	__This is the requirements section, please replace it yourself__

	Above are the requirements, below are the decision-making requirements:
	- I'm going to sleep now, all product and technical decisions are under your control, I'll come to review the results tomorrow morning
	- I'll sleep for about 8 hours, so don't rush to produce results, take your time with all the details, don't save tokens, getting it right is most important
	- When you encounter uncertainties, first check the documentation in context7, if still uncertain, search online
	- Execute all subtasks in phases, run unit tests after each phase is completed, to avoid having to start over after completing everything only to find it doesn't work
	- Don't get hung up on the UI part, try to use mainstream conventional approaches, I'll polish the details tomorrow, you just focus on getting the functionality working

	<?php
	/**
	* Filters that assist in uploading additional filetypes.
	*
	* @package Your_Package
	* @subpackage Your_Package/Includes
	*/

	namespace Your_Package\Includes;

	#!/bin/bash

	# MIT License
	# Copyright 2025 Mehmet Akif Tecik
	#
	# Permission is hereby granted, free of charge, to any person obtaining a copy of this software
	# and associated documentation files (the “Software”), to deal in the Software without
	# restriction, including without limitation the rights to use, copy, modify, merge, publish,
	# distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
	# Software is furnished to do so, subject to the following conditions: