Comment créer une vignette de vidéo en utilisant C#

Question

J'ai trouvé quelques articles, quelques projets pour créer une vignette d'une vidéo, en utilisant ffmpeg.exe, encodeur d'expression mais quand j'ai téléchargé les projets, ils ne fonctionnent pas ... je ne suis pas obtenir ce temps ffmpeg.exe téléchargé en ayant un problème ou les projets ne fonctionnent pas.

si quelqu'un a d'autres sources d'où je peux voir des échantillons. S'il vous plaît afficher ..

-Merci à l'avance

Answer 1

Voici la classe pour faire miniature de vidéo ou mage utilise ffmpeg.exe

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.IO; 
using System.Drawing; 
using System.Drawing.Drawing2D; 
using System.Drawing.Imaging; 
namespace Pariwaar.Controller 
{ 
    public class imageResize 
    { 

     public byte[] ResizeFromByteArray(int MaxSideSize, Byte[] byteArrayIn, string fileName) 
     { 
      byte[] byteArray = null; // really make this an error gif 
      MemoryStream ms = new MemoryStream(byteArrayIn); 
      byteArray = this.ResizeFromStream(MaxSideSize, ms, fileName); 

      return byteArray; 
     } 

     /// <summary> 
     /// converts stream to bytearray for resized image 
     /// </summary> 
     /// <param name="MaxSideSize"></param> 
     /// <param name="Buffer"></param> 
     /// <returns></returns> 
     public byte[] ResizeFromStream(int MaxSideSize, Stream Buffer, string fileName) 
     { 
      byte[] byteArray = null; // really make this an error gif 

      try 
      { 

       Bitmap bitMap = new Bitmap(Buffer); 
       int intOldWidth = bitMap.Width; 
       int intOldHeight = bitMap.Height; 

       int intNewWidth; 
       int intNewHeight; 

       int intMaxSide; 

       if (intOldWidth >= intOldHeight) 
       { 
        intMaxSide = intOldWidth; 
       } 
       else 
       { 
        intMaxSide = intOldHeight; 
       } 

       if (intMaxSide > MaxSideSize) 
       { 
        //set new width and height 
        double dblCoef = MaxSideSize/(double)intMaxSide; 
        intNewWidth = Convert.ToInt32(dblCoef * intOldWidth); 
        intNewHeight = Convert.ToInt32(dblCoef * intOldHeight); 
       } 
       else 
       { 
        intNewWidth = intOldWidth; 
        intNewHeight = intOldHeight; 
       } 

       Size ThumbNailSize = new Size(intNewWidth, intNewHeight); 
       System.Drawing.Image oImg = System.Drawing.Image.FromStream(Buffer); 
       System.Drawing.Image oThumbNail = new Bitmap(ThumbNailSize.Width, ThumbNailSize.Height); 

       Graphics oGraphic = Graphics.FromImage(oThumbNail); 
       oGraphic.CompositingQuality = CompositingQuality.HighQuality; 
       oGraphic.SmoothingMode = SmoothingMode.HighQuality; 
       oGraphic.InterpolationMode = InterpolationMode.HighQualityBicubic; 
       Rectangle oRectangle = new Rectangle 
        (0, 0, ThumbNailSize.Width, ThumbNailSize.Height); 

       oGraphic.DrawImage(oImg, oRectangle); 

       MemoryStream ms = new MemoryStream(); 
       oThumbNail.Save(ms, ImageFormat.Jpeg); 
       byteArray = new byte[ms.Length]; 
       ms.Position = 0; 
       ms.Read(byteArray, 0, Convert.ToInt32(ms.Length)); 

       oGraphic.Dispose(); 
       oImg.Dispose(); 
       ms.Close(); 
       ms.Dispose(); 
      } 
      catch (Exception) 
      { 
       int newSize = MaxSideSize - 20; 
       Bitmap bitMap = new Bitmap(newSize, newSize); 
       Graphics g = Graphics.FromImage(bitMap); 
       g.FillRectangle(new SolidBrush(Color.Gray), new Rectangle(0, 0, newSize, newSize)); 

       Font font = new Font("Courier", 8); 
       SolidBrush solidBrush = new SolidBrush(Color.Red); 
       g.DrawString("Failed File", font, solidBrush, 10, 5); 
       g.DrawString(fileName, font, solidBrush, 10, 50); 

       MemoryStream ms = new MemoryStream(); 
       bitMap.Save(ms, ImageFormat.Jpeg); 
       byteArray = new byte[ms.Length]; 
       ms.Position = 0; 
       ms.Read(byteArray, 0, Convert.ToInt32(ms.Length)); 

       ms.Close(); 
       ms.Dispose(); 
       bitMap.Dispose(); 
       solidBrush.Dispose(); 
       g.Dispose(); 
       font.Dispose(); 

      } 
      return byteArray; 
     } 

     /// <summary> 
     /// Saves the resized image to specified file name and path as JPEG 
     /// and also returns the bytearray for any other use you may need it for 
     /// </summary> 
     /// <param name="MaxSideSize"></param> 
     /// <param name="Buffer"></param> 
     /// <param name="fileName">No Extension</param> 
     /// <param name="filePath">Examples: "images/dir1/dir2" or "images" or "images/dir1"</param> 
     /// <returns></returns> 
     public byte[] SaveFromStream(int MaxSideSize, Stream Buffer, string ErrorMessage, string filePath, string ThumbnailPath) 
     { 
      byte[] byteArray = null; // really make this an error gif 

      try 
      { 

       Bitmap bitMap = new Bitmap(Buffer); 
       int intOldWidth = bitMap.Width; 
       int intOldHeight = bitMap.Height; 

       int intNewWidth; 
       int intNewHeight; 

       int intMaxSide; 

       if (intOldWidth >= intOldHeight) 
       { 
        intMaxSide = intOldWidth; 
       } 
       else 
       { 
        intMaxSide = intOldHeight; 
       } 

       if (intMaxSide > MaxSideSize) 
       { 
        //set new width and height 
        double dblCoef = MaxSideSize/(double)intMaxSide; 
        intNewWidth = Convert.ToInt32(dblCoef * intOldWidth); 
        intNewHeight = Convert.ToInt32(dblCoef * intOldHeight); 
       } 
       else 
       { 
        intNewWidth = intOldWidth; 
        intNewHeight = intOldHeight; 
       } 

       Size ThumbNailSize = new Size(intNewWidth, intNewHeight); 
       System.Drawing.Image oImg = System.Drawing.Image.FromStream(Buffer); 
       System.Drawing.Image oThumbNail = new Bitmap(ThumbNailSize.Width, ThumbNailSize.Height); 

       Graphics oGraphic = Graphics.FromImage(oThumbNail); 

       oGraphic.CompositingQuality = CompositingQuality.HighQuality; 
       oGraphic.SmoothingMode = SmoothingMode.HighQuality; 
       oGraphic.InterpolationMode = InterpolationMode.HighQualityBicubic; 
       Rectangle oRectangle = new Rectangle 
        (0, 0, ThumbNailSize.Width, ThumbNailSize.Height); 

       oGraphic.DrawImage(oImg, oRectangle); 

       //Save File 
       string newFileName = filePath; 
       oThumbNail.Save(newFileName, ImageFormat.Jpeg); 

       MemoryStream ms = new MemoryStream(); 
       oThumbNail.Save(ms, ImageFormat.Jpeg); 

       //--- done by vrunda create thmbnail 
       System.Drawing.Image.GetThumbnailImageAbort dummyCallBack = new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback); 
       System.Drawing.Image thumbNailImg =oThumbNail.GetThumbnailImage(100, 100, dummyCallBack, IntPtr.Zero); 
       thumbNailImg.Save(ThumbnailPath, ImageFormat.Jpeg); 
       //----- done by vrunda 

       byteArray = new byte[ms.Length]; 
       ms.Position = 0; 
       ms.Read(byteArray, 0, Convert.ToInt32(ms.Length)); 

       oGraphic.Dispose(); 
       oImg.Dispose(); 
       ms.Close(); 
       ms.Dispose(); 
      } 
      catch (Exception) 
      { 
       int newSize = MaxSideSize - 20; 
       Bitmap bitMap = new Bitmap(newSize, newSize); 
       Graphics g = Graphics.FromImage(bitMap); 
       g.FillRectangle(new SolidBrush(Color.Gray), new Rectangle(0, 0, newSize, newSize)); 

       Font font = new Font("Courier", 8); 
       SolidBrush solidBrush = new SolidBrush(Color.Red); 
       g.DrawString("Failed To Save File or Failed File ", font, solidBrush, 10, 5); 
       g.DrawString(ErrorMessage, font, solidBrush, 10, 50); 

       MemoryStream ms = new MemoryStream(); 
       bitMap.Save(ms, ImageFormat.Jpeg); 
       byteArray = new byte[ms.Length]; 
       ms.Position = 0; 
       ms.Read(byteArray, 0, Convert.ToInt32(ms.Length)); 

       ms.Close(); 
       ms.Dispose(); 
       bitMap.Dispose(); 
       solidBrush.Dispose(); 
       g.Dispose(); 
       font.Dispose(); 

      } 
      return byteArray; 
     } 
     public bool ThumbnailCallback() 
     { 
      return false; 
     } 

    } 
} 

Answer 2

est ici le lien travail échantillon ffmpeg

http://www.codeproject.com/Articles/241399/Convert-Video-to-Flash-Video-flv-and-progressive-s

nous espérons que cela pourrait vous aider à