Table of Contents need accomplish The front-end plays the picture of Hikvision camera Record video Method 1: HTMLVideoElement (obsolete) Method 2: HTMLCanvasElement (obsolete) Method three: javaCV code question Requirement The front end receives the hls stream converted from rtsp by webrtc-streamer Click the start button to start recording for a while Click the Stop button […]
Tag: recording
Unity photography and screen recording development exploration
1. Take photos This can be achieved using Unity’s RenderTexture and Texture2D classes, which require a camera to take pictures, and then save the camera’s rendering results to the Texture by creating a RenderTexture. Finally convert this Texture to a regular 2D texture and save it as an image file. public class PhotoShootHandler : MonoBehaviour […]
Web (h5) and Electron implement recording software
Background In today’s increasingly advanced world of modern technology, our computers and mobile phone devices are capable of completing many daily tasks, one of which is recording. Whether it is recording meetings, making voice memos, or composing music, recording is one of the functions we often use in our lives. This article will introduce how […]
Basic use of PyAudio module, blocking/non-blocking recording/playing of audio
pyaudio library: audio processing pyaudio documentation, most variables and interface definitions are still in the C version of PortAudio documentation. The PyAudio object is only responsible for playing audio, and is not responsible for reading binary data from the file, so the reading must be done outside, and what is given to it is binary […]
7×24 hours cloud recording — KPlayer
Cloud server live streaming Foreword If you have a free server, you can try these. I bought a server for 58 yuan per year on the third anniversary of a Tencent Cloud product event. Introduction to KPlayer KPlayer is an application designed and developed by ByteLang Studio for pushing media resources in a Linux environment. […]
Qt6 multimedia development code analysis (5. Video recording and photography)
#ifndef MAINWINDOW_H #define MAINWINDOW_H #include <QMainWindow> #include <QtMultimedia> #include <QLabel> QT_BEGIN_NAMESPACE namespace Ui { class MainWindow; } QT_END_NAMESPACE class MainWindow : public QMainWindow { Q_OBJECT private: QMediaCaptureSession *session; //Capture manager QCamera *camera; //Camera QImageCapture *imageCapture; //Image capturer QSoundEffect *soundEffect; //Used to play shutter sound effects when taking pictures QMediaRecorder *recorder; //Recording QLabel *labDuration; //Used to […]
Qt6 multimedia development code analysis (2. Recording)
Common audio encoding formats include MP3, AAC, OGG, WMA, FLAC, etc., and they have the following differences: Different encoding methods: These encoding formats use different encoding algorithms. For example, MP3 and AAC use lossy compression algorithms, while FLAC uses lossless compression algorithms. Different compression rates and file sizes: Due to the different encoding algorithms used, […]
Android uses CameraX to implement operations such as previewing/photography/recording video/image analysis/focusing/zooming/switching cameras.
1. CameraX architecture See official documentation CameraX architecture There is the following passage Using CameraX, you interact with your device’s camera with the help of abstract concepts called “use cases.” Preview: Accepts a Surface used to display previews, such as PreviewView Image Analysis : Provides a CPU-accessible buffer for analysis (e.g. machine learning) Picture Capture […]
Summary of Android floating window screen recording problems
1. The first problem encountered is Caused by: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@73e5526 — permission denied for window type 2003 java.lang.RuntimeException: Unable to create service com.example.liuw.camera2demo.service.ScreenRecordService: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@73e5526 — permission denied for window type 2003 After continuous investigation, it was found that it was a permissions issue. Project addition <service […]
Restore the scene – front-end recording user behavior technical solution
Click on the front-end Q above and follow the public account Reply to join the group and join the front-end Q technology exchange group 1. Problem background At present, in our projects, we usually use various tracking and monitoring to collect information about page visits, such as click tracking, PV tracking, etc. These tracking data […]