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A Beginner's Guide to FFmpeg.AutoGen

Introduction

FFmpeg.AutoGen is an auto-generated unsafe bindings for C#/.NET and Mono. It can be used in C#/.NET to invoke ffmpeg's C/C++ libraries.

The usage is the same as C/C++ API so you can refer to ffmpeg official documents. However, in C#/.NET, we need to load the libraries first, which confused me for a long time.

Here I concluded the some useful information for beginners to start using ffmpeg.AutoGen.

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$TARGET_WIDTH = 1620

$widthDictionary = @{}
$maxWidth = 0

foreach ($f in Get-ChildItem -File *.jpg, *.png, *.bmp) {
    $info = magick identify -format "%w" "$($f.Name)"
    $width = $info -as [int]
    $widthDictionary[$f.Name] = $width
    Write-Output "Compare $($f.Name) size $width with $maxWidth"

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using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using CameraCaptureBot.Core.Configs;
using FFmpeg.AutoGen.Abstractions;
using FFmpeg.AutoGen.Bindings.DynamicallyLinked;
using FFmpeg.AutoGen.Bindings.DynamicallyLoaded;
using Microsoft.Extensions.Options;

namespace CameraCaptureBot.Core;

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$ext = ".jpg"

foreach ($img in Get-Item "*$($ext)") {
    $jxlName = $img.Name.Replace($img.Extension, ".jxl")
    Write-Host "converting $($img.Name) to JPEG-XL."
    magick $img.Name -define jxl:effort=7 -define jxl:distance=0 -quality 100 "$($jxlName)"
    magick identify "$($jxlName)"
}

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import axios from 'axios'
import { Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'

// create an axios instance
const service = axios.create({
  baseURL: 'http://localhost:8887',
  // baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests

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# sdb~e:        4x 1T DATA disk
# nvme0~1n1:    2x 3T META disk

# metadata:     2x(2x(50G DB + 10G WAL))

#!/bin/bash

NVME_DISK_LIST=("/dev/nvme0n1" "/dev/nvme1n1")
DATA_DISK_NUM=4
WAL_SIZE=10240

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#include <stdlib.h>
#include <errno.h>
#include <netinet/in.h>
#include <net/if.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>

#define MAC_ADDRESS_LENGTH (6)

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package cn.gaein.java.course_evaluation.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;