Recherche avancée

Sur d’autres sites (5722)

• FFMPEG Changes Date of Output Video [closed]

  6 mai 2023, par hello i couldnt think of a goo

  I'd like to make the date of the output video the same as the date of the input video. Is there any command prompt command to do this or a way to put the date in the title of the output video ? Thanks !

  


• Unable to link FFMpeg libraries in Visual studio 2012

  29 juin 2013, par Pferd

  I have been trying to link the FFMPEG static libraries to Visual studio 2012 in c++ environment. But i get the following error.

  • Error 1 error LNK1104 : cannot open file
    'avcodec.lib' C :\Users\username\Documents\Visual Studio
    2012\Projects\ConsoleApplication5\ConsoleApplication5\LINK ConsoleApplication5

  my lib files were located in C :\Users\username\Documents\Visual Studio 2012\Projects\ConsoleApplication5\ConsoleApplication5\ExtLib\lib

  The compile seems to be fine. The command line is

  • /Yu"stdafx.h" /GS /W3 /Zc:wchar_t
    /I"C :\Users\username\Documents\Visual Studio
    2012\Projects\ConsoleApplication5\ConsoleApplication5\ExtLib\include"
    /Zi /Gm /Od /sdl /Fd"x64\Debug\vc110.pdb" /fp:precise /D "WIN32" /D
    "_DEBUG" /D "_CONSOLE" /D "_UNICODE" /D "UNICODE" /errorReport:prompt
    /WX- /Zc:forScope /RTC1 /Gd /MTd /Fa"x64\Debug\" /EHsc /nologo
    /Fo"x64\Debug\" /Fp"x64\Debug\ConsoleApplication5.pch"

  The main issue seems to be at the linking stage where I have just not been able to get VS2012 to find my ffmpeg .lib files

  The linker command line is below :

  • /OUT :"C :\Users\username\Documents\Visual Studio
    2012\Projects\ConsoleApplication5\x64\Debug\ConsoleApplication5.exe"
    /MANIFEST /NXCOMPAT /PDB :"C :\Users\username\Documents\Visual Studio
    2012\Projects\ConsoleApplication5\x64\Debug\ConsoleApplication5.pdb"
    /DYNAMICBASE "avcodec.lib" "kernel32.lib" "user32.lib" "gdi32.lib"
    "winspool.lib" "comdlg32.lib" "advapi32.lib" "shell32.lib"
    "ole32.lib" "oleaut32.lib" "uuid.lib" "odbc32.lib" "odbccp32.lib"
    /DEBUG /MACHINE:X64 /OPT:NOREF /INCREMENTAL
    /PGD :"C :\Users\username\Documents\Visual Studio
    2012\Projects\ConsoleApplication5\x64\Debug\ConsoleApplication5.pgd"
    /SUBSYSTEM:CONSOLE /MANIFESTUAC :"level='asInvoker' uiAccess='false'"
    /ManifestFile :"x64\Debug\ConsoleApplication5.exe.intermediate.manifest"
    /ERRORREPORT:PROMPT /NOLOGO
    /LIBPATH :"/LIBPATH:C :\Users\username\Documents\Visual Studio
    2012\Projects\ConsoleApplication5\ConsoleApplication5\ExtLib\lib"
    /TLBID:1

  I cant figure out why the linker cant locate my ffmpeg lib files even though they are physically located in the /LIBPATH area - c :...\vs12...\ExtLib\lib

• my ffmpeg stops streaming after a few seconds

  16 février 2015, par Andrew Simpson

  This is all new to me.

  I am using ffmpeg in my c# desktop app.

  The idea is to use the Process under C# to start ffmpeg on the DOS prompt.

  I then parse each bit of data to ’split’ off my jpegs.

  But after a few seconds the feed just stops.

  This is my code :

   private void button1_Click(object sender, EventArgs e)
  
      {
  
          try
  
          {
  
              Process process = new Process();
  
              FileStream baseStream = null;
  
  
  
              string arguments = @" -i rtsp://admin:admin@192.168.0.8:554/video_1 -an -f image2pipe -vf fps=fps=6 -qscale 0 -";
  
              string file = @"C:\bin\ffmpeg.exe";
  
              process.StartInfo.FileName = file;
  
              process.StartInfo.Arguments = arguments;
  
              process.StartInfo.CreateNoWindow = true;
  
              process.StartInfo.RedirectStandardError = true;
  
              process.StartInfo.RedirectStandardOutput = true;
  
              process.StartInfo.UseShellExecute = false;
  
  
  
              Task.Run(() =>
  
              {
  
                  try
  
                  {
  
                      process.Start();
  
                      byte[] buffer = new byte[200000];
  
                      //var error = process.StandardError.ReadToEnd();
  
                      //var error = process..ReadToEnd();
  
  
  
                      baseStream = process.StandardOutput.BaseStream as FileStream;
  
                      bool gotHeader = false;
  
                      bool imgFound = false;
  
                      int counter = 0;
  
                      while (true)
  
                      {
  
                          byte bit1 = (byte)baseStream.ReadByte();
  
                          buffer[counter] = bit1;
  
  
  
                          if (bit1 == 217 && gotHeader)
  
                          {
  
                              if (buffer[counter - 1] == 255)
  
                              {
  
                                  byte[] jpeg = new byte[counter];
  
                                  Buffer.BlockCopy(buffer, 0, jpeg, 0, counter);
  
                                  using (MemoryStream ms = new MemoryStream(jpeg))
  
                                  {
  
                                      pictureBox1.Image = Image.FromStream(ms);
  
                                      ms.Close();
  
                                  }
  
                                  imgFound = true;
  
                              }
  
                          }
  
                          else if (bit1 == 216)
  
                          {
  
                              if (buffer[counter - 1] == 255)
  
                              {
  
                                  gotHeader = true;
  
                              }
  
                          }
  
                          if (imgFound)
  
                          {
  
                              counter = 0;
  
                              buffer = new byte[200000];
  
                              imgFound = false;
  
                              gotHeader = false;
  
                          }
  
                          else
  
                          {
  
                              counter++;
  
                          }
  
                      }
  
                  }
  
                  catch (Exception ex2)
  
                  {
  
                      //log error here
  
                  }
  
              });
  
          }
  
          catch (Exception ex)
  
          {
  
              //log error here
  
          }
  
      }

  Like I said it works but then just stops.

  Is there something I should be mindful of ?

  Finally, is there a was to specify the quality of the jpeg ?

  NOTE
  I have already tried this just in the DOS Prompt and that also ’freezes’ after a few seconds.