timerring

CPU can only see the threads

January 23, 2025 · 12 min read · Page View:
Tutorial
Multiple Threads | Multiple Processes | Coroutine | Python

In python, due to the GIL (Global Interpreter Lock), which is a mutex and ensures only one thread can execute at a time, so the multiple threads parallel execution is not supported under the CPython interpreter. But what about the multiple processes? What is the difference between them? How to choose the right method? Do you know the coroutine? Let’s explore it together.

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Video Technology 101

January 20, 2025 · 21 min read · Page View:
Tutorial
Video | Resolution | Frame Rate | Bit Rate | Codec | Color Depth | HDR | Video Format

Do you really understand the video technology? What is the frame rate, resolution, bit rate and their relationships? Do you know the parameters p and K in the terminology 1080p and 4K? Do you know how to describe the video quality? What is the Blu-ray Disc on earth? What the difference between the codec such as H.264/AVC, H.265/HEVC, AV1? You may notice the Apple ProRes in apple, so do you really understand what it for? Do you know the HDR and Dolby Vision? So why there are so many tailers such as .mp4, .mkv, .flv, etc?

Now this Video Technology 101 will introduce them to you.

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