c# AForge.NET - comment enregistrer une vidéo de la caméra dans un fichier

Question

J'ai besoin d'aide pour sauvegarder une vidéo de la caméra de l'ordinateur portable dans un fichier. J'utilise maintenant un code pour rechercher les périphériques vidéo et la vidéo précédente sur pictureBox. J'ai essayé avec AVIFileWrite mais j'ai échoué. Comment utiliser VideoFileWriter pour atteindre mon objectif ?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using AForge.Video;
using AForge.Video.DirectShow;
using AForge.Video.FFMPEG;
using System.IO;
using AForge.Video.VFW;
using System.Drawing.Imaging;

namespace VideoCapture
{
    public partial class Form1 : Form
    {
        private FilterInfoCollection VideoCaptureDevices;
        private VideoCaptureDevice FinalVideo;
        public static Bitmap _latestFrame;
        //private VideoFileWriter writer;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            VideoCaptureDevices = new                  FilterInfoCollection(FilterCategory.VideoInputDevice);
        foreach (FilterInfo VideoCaptureDevice in VideoCaptureDevices)
        {
            comboBox1.Items.Add(VideoCaptureDevice.Name);
        }
        comboBox1.SelectedIndex = 0;
    }

    private void button1_Click(object sender, EventArgs e)
    {

        FinalVideo = new    VideoCaptureDevice(VideoCaptureDevices[comboBox1.SelectedIndex].MonikerString);
        FinalVideo.NewFrame += new NewFrameEventHandler(FinalVideo_NewFrame);
        FinalVideo.Start();
    }
    void FinalVideo_NewFrame(object sender, NewFrameEventArgs eventArgs)
    {
        Bitmap video = (Bitmap)eventArgs.Frame.Clone();

        pictureBox1.Image = video;

        //int width = 640;
        //int height = 480;

        //VideoFileWriter writer = new VideoFileWriter();
        //writer.Open(@"c:\video.avi", width, height, 25, VideoCodec.Default, 1000000);

        //for (int i = 0; i < 1000; i++)
        //{
        //    writer.WriteVideoFrame(video);
        //}

        //writer.Close();

        //Bitmap image = new Bitmap(width, height, PixelFormat.Format24bppRgb);
        //writer.WriteVideoFrame(image);                      
        //MessageBox.Show("jest");           
    }

    private void button2_Click(object sender, EventArgs e)
    {
        if (FinalVideo.IsRunning)
        {
            FinalVideo.Stop();

        }
    }

    private void Form1_FormClosing(object sender, FormClosingEventArgs e)
    {
        if (FinalVideo.IsRunning == true) FinalVideo.Stop();
    }

    private void timer1_Tick(object sender, EventArgs e)
    {
        label1.Text = "Device running..." + FinalVideo.FramesReceived.ToString() + " FPS";
    }

}

}

Answer 1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using AForge.Video;
using AForge.Video.DirectShow;
using AForge.Video.FFMPEG;
using AForge.Video.VFW;

namespace WindowsFormsApplication12
{
    public partial class Form1 : Form
    {
        private FilterInfoCollection VideoCaptureDevices;

        private VideoCaptureDevice FinalVideo = null;
        private VideoCaptureDeviceForm captureDevice;
        private Bitmap video;
        //private AVIWriter AVIwriter = new AVIWriter();
        private VideoFileWriter FileWriter = new VideoFileWriter();
        private SaveFileDialog saveAvi;
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

            VideoCaptureDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
            captureDevice = new VideoCaptureDeviceForm();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (captureDevice.ShowDialog(this) == DialogResult.OK)
            {

                //VideoCaptureDevice videoSource = captureDevice.VideoDevice;
                FinalVideo = captureDevice.VideoDevice;
                FinalVideo.NewFrame += new NewFrameEventHandler(FinalVideo_NewFrame);
                FinalVideo.Start();
            }
        }
        void FinalVideo_NewFrame(object sender, NewFrameEventArgs eventArgs)
        {
            if (butStop.Text == "Stop Record")
            {
                video = (Bitmap)eventArgs.Frame.Clone();
                pictureBox1.Image = (Bitmap)eventArgs.Frame.Clone();
                //AVIwriter.Quality = 0;
                FileWriter.WriteVideoFrame(video);
                //AVIwriter.AddFrame(video);
            }
            else
            {
                video = (Bitmap)eventArgs.Frame.Clone();
                pictureBox1.Image = (Bitmap)eventArgs.Frame.Clone();
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            saveAvi = new SaveFileDialog();
            saveAvi.Filter = "Avi Files (*.avi)|*.avi";
            if (saveAvi.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                int h = captureDevice.VideoDevice.VideoResolution.FrameSize.Height;
                int w = captureDevice.VideoDevice.VideoResolution.FrameSize.Width;
                FileWriter.Open(saveAvi.FileName, w, h, 25, VideoCodec.Default, 5000000);
                FileWriter.WriteVideoFrame(video);

                //AVIwriter.Open(saveAvi.FileName, w, h);
                butStop.Text = "Stop Record";
                //FinalVideo = captureDevice.VideoDevice;
                //FinalVideo.NewFrame += new NewFrameEventHandler(FinalVideo_NewFrame);
                //FinalVideo.Start();
            }
        }

        private void butStop_Click(object sender, EventArgs e)
        {
            if (butStop.Text == "Stop Record")
            {
                butStop.Text = "Stop";
                if (FinalVideo == null)
                { return; }
                if (FinalVideo.IsRunning)
                {
                    //this.FinalVideo.Stop();
                    FileWriter.Close();
                    //this.AVIwriter.Close();
                    pictureBox1.Image = null;
                }
            }
            else
            {
                this.FinalVideo.Stop();
                FileWriter.Close();
                //this.AVIwriter.Close();
                pictureBox1.Image = null;
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            pictureBox1.Image.Save("IMG" + DateTime.Now.ToString("hhmmss") + ".jpg");
        }

        private void button4_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (FinalVideo == null)
            { return; }
            if (FinalVideo.IsRunning)
            {
                this.FinalVideo.Stop();
                FileWriter.Close();
                //this.AVIwriter.Close();
            }
        }

    }
}

de cette façon ;)

Answer 2

Ce n'est pas une réponse définitive, mais : chaque fois que vous appelez writer.Open(...), il utilise Win32.OpenFileMode.Create au lieu de Win32.OpenFileMode.ReadWrite et donc il va écraser le fichier à chaque fois au lieu d'ajouter des images, donc votre résultat sera une vidéo contenant 1 image. J'ai le même problème : ma page