Programmer Group

1. Codcs string encoding and decoding The codecs module provides both stream and file interfaces to convert different representations of text data.Usually used to process Unicode text, but additional encoding is provided for other purposes. 1.1 Getting started with Unicode CPython 3.x distinguishes between text and byte strings.The bytes instan ...

[overview] Implement a group chat tool. The client messages participating in the chat are broadcast through the server. It mainly consists of two parts: chat server and chat client. Chat server function overview: 1. Monitor the access and disconnection of all clients 2. When client A accesses the chat room, send the access message to other clie ...

1, Environment introduction Operating system introduction: ubuntu 18.04 FFMPEG version: 4.4.2 Camera: USB camera, virtual machine attached camera of the machine 2, Download and compile FFMPEG and X264 X264 download address: http://www.videolan.org/developers/x264.html FFMPEG download address: ...

Article directory Read video stream Screen insert text Read video stream cv2.getcapture(), use the function cap.get(propId) to get some parameter information of the video. Here the propId can be any integer between 0 and 18. Each number represents an attribute of the video: cv2.VideoCapture.get ...

Introduction to FFmpeg: Common API usage and C language development Understanding Related Concepts 1. Basic concepts of multimedia files 2. Quantitative encoding of audio 3. Time Base Environment Configuration Related Downloads Environment Configuration test Development Cases Processing logic and ...

This paper originally planned to write two parts. The first is to record the latest bugs related to Base64. The second is the detailed explanation of the principle of Base64 encoding. It turns out it's half written, eh? How can I say such a long time about a thing that is not complicated? It's not conducive to reading and understanding (actuall ...

Basic introduction of TCP packet sticking and unpacking TCP is connection oriented, flow oriented, and provides high reliability services. There should be one-to-one comparison of socket s on both sides of the transceiver (client and server). Therefore, in order to send multiple packets to the server ...

Article directory Preface Experimental code Follow up source code Inheritance relationship of DelimiterBasedFrameDecoder Property of DelimiterBasedFrameDecoder Analysis of construction method decode implementation Preface This section will take a look at the decoder that Netty provides to user ...

Sticking and unpacking of Tcp 1.TCP is connection oriented, flow oriented, and provides high reliability services. There must be one pair of socket s at both ends of the transceiver. Therefore, in order to send multiple packets to the receiver more effectively, the sender uses the optimization method ...

I've been trying to figure out how to rotate video using FFmpeg. I'm using iPhone Video in portrait mode. I know how to use it MediaInfo (great library, by the way) determine the current rotation angle, but now I'm stuck with FFmpeg. According to my reading, you need to use the vfilter option. From what I see, it should look like this: ff ...