下载M3U8视频并存为MP4格式 ffmpeg -i [https://host/path/to/xxx.m3u8] [output.mp4] 将MP3格式转化为M3U8 ffmpeg -i [input.mp3] -c:a libmp3lame -b:a 128k -map 0:0 -f segment -segment_time 10 -segment_list [output.m3u8] -segment_format mpegts [%03d.ts] 将MP4格式转化为M3U8 ffmpeg -i [input.mp4] -f segment -segment_time 10 -segment_format mpegts -segment_list [output.m3u8] -c copy -bsf:v h264_mp4toannexb -map 0 [%04d.ts] 转成H264编码 ffmpeg -i [input.mp4] -c:v libx264 -preset faster -crf 32 -c:a copy [output.mp4]

python3 -m venv .venv # create virtual environment source .venv/bin/activate # load virtual environment windows激活虚拟环境报错activate : File \.venv\Scripts\Activate.ps1 cannot be loaded because running scripts is disabled on this system. Set-ExecutionPolicy -Scope CurrentUser RemoteSigned

安装 安装chromium npx playwright install chromium 仅安装chromium shell及系统依赖 npx playwright install --with-deps --only-shell chromium

创建证书 生成证书文件certificate.crt openssl req -x509 -newkey rsa:2048 -keyout [certificate.key] -out [certificate.crt] -days 365 -nodes -subj "/CN=*.example.com" -addext "subjectAltName=DNS:*.example.com" 或 //codefile: sans.cnf [ req ] default_bits = 2048 distinguished_name = req_distinguished_name req_extensions = req_ext x509_extensions = v3_ca prompt = no [ req_distinguished_name ] C = US ST = California L = San Francisco O = Example Company OU = IT Department CN = *.example.com # Primary common name (CN) [ req_

大小写转换 转换为大写：Ctrl+Shift+u 转换为小写：Ctrl+Shift+l

图片指定宽长比 <div class="image"> <div> <img src="xxx" /> </div> </div> padding-top计算百分比的基数是容器的width，示例中宽高比为4:3 percentage: The size of the padding as a percentage, relative to the inline size (width in a horizontal language, defined by writing-mode) of the containing block. Must be nonnegative. .image { width: 100%; padding-top: calc(3 / 4 * 100%); /* calc(Height / Width * Percentage%) */ position: relative; overflow: hidden; div { position: absolute; top: 0; left: 0; bottom: 0; right: 0; img { object-fit: cover

You can generate a self-signed certificate for development purposes using tools like OpenSSL or PowerShell on Windows, or even .NET's own APIs if you’re building the certificate within your .NET code. Here’s how to generate a self-signed certificate using these methods: Method 1: Generate a Self-Signed Certificate with OpenSSL Prerequisites: Make sure you have OpenSSL installed on your system. Generate a Private Key: openssl genpkey -algorithm RSA -out private.key -pkeyopt rsa_keygen_bits:2048 Generate a Ce

config git config --local user.name "tongqijie" git config --local user.email "tongqijie@hotmail.com" git config credential.helper store git config core.ignorecase false: 设置文件名大小写敏感 git config --local --unset user.password git config --local advice.detachedHead false git config --local http.sslVerify false pull git pull push git push clone git clone [remote-repository] [local folder] Chnages git status Stage untracked/modified files/folder git add [file|folder] stage specified single file or specified folde

在当前目录创建conda环境 conda create --prefix ./.venv python=3.12 激活当前目录下conda环境 conda activate ./.venv 退出当前目录下conda环境 conda deactivate 安装python依赖包(requirements.txt) pip install -r /path/to/requirements.txt

RS256 PKCS1格式私钥生成 openssl genrsa -out rs256_private_key.pem 2048 生成的PKCS1格式私钥示例 //codefile:rs256_private_key.pem -----BEGIN RSA PRIVATE KEY----- MIIEpAIBAAKCAQEAnAUSXxqv7dsrb42IdwR8yJ+sYi0YCduTXbcNOurVLu9gOOQq 56ArwIwDKF7Tscd0oANRuYaNnPPJrM9D4drHITmK/V6zEerSs6UvJYJ4W+avaWnU DIV+jdQEXJRvflKN/4UdCqF/jdVIXutgkyXbGA3gkwWV0SDbeQPpbPiP5NYO5TI0 Tt1MwY0dWXE9t6GmD4i+k+ZrmMN2is8N7l4TEmBgs6HD+My+HQw2lpoS8rT4eJ76 eOEO6RSxeEc43Hn3e1oOgLj5EI7EaPT8IOtQdLK8qSwbbwc9ZXDN0DLzmCPHSF6B lu0mYE/P+MXQAdwO2bH/Qp3ho24V1KAeO8TCBQIDAQ