摘要：How to insert some user data unregistered SEI messages in H.264 compressed bit stream, for example in a MP4 container? That is what I will talk about 阅读全文

摘要：Pre-requirment: compile and install openssl library, which includes a command line utility openssl Step 1: Generate a RSA key pair and save them to tw 阅读全文

摘要：I am digging into a project that needs to use some open source video codec library. FFmpeg is very powerful video codec library, which I decided to us 阅读全文

摘要：周末把mac mini升级到了macOS Sierra。”照片“应用的自动分类是个很有意义的升级，因为这台mini在家里主要的实用功能除了上网就是归档照片。归档照片总是一件耗时的事情，尤其是对于经常旅行又热爱拍照的人来说，照片的数量增长很快，而人脸识别等图像识别技术可以让这件事变得简单很多。 对于人 阅读全文