liuziangexit

输出转换后的文件时包含 EXIF 元数据(2017年内)
色域转换(2018年初)
在 Windows 资源管理器直接显示 HEIF 图片的略缩图(2018年初)

all done。

liuziangexit

Run the following in the terminal:

Install the gcc-7 packages:

sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt update
sudo apt install g++-7 -y

Set it up so the symbolic links gcc, g++ point to the newer version:

liuziangexit

I did the following to install devtoolset-7:
yum install centos-release-scl
yum install devtoolset-7-gcc-c++

Every time I want gcc to default to using GCC 7, I run the following:
scl enable devtoolset-7 bash

liuziangexit

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

liuziangexit

OpenCV Video Writer on Mac OS X

Fourcc tests:

• x : not worked
• o: worked (able to open in quicktime but need conversion)
• oo: worked well (preview worked but wrong aspect ratio)
• ooo: worked very well (preview worked, and aspect ratio’s right)

(Codecs are extracted from https://web.archive.org/web/20120722124832/http://opencv.willowgarage.com/wiki/QuickTimeCodecs )

liuziangexit

cd /System/Library/CoreServices/Spotlight.app/Contents/MacOS
sudo cp Spotlight Spotlight.bak
sudo perl -pi -e 's|(\x00\x00\x00\x00\x00\x00\x47\x40\x00\x00\x00\x00\x00\x00)\x42\x40(\x00\x00\x80\x3f\x00\x00\x70\x42)|$1\x00\x00$2|sg' Spotlight
cmp -l Spotlight Spotlight.bak 
sudo codesign -f -s - Spotlight
sudo killall Spotlight