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• Merge 2 video files with thier audio in a single file side by side

  27 mai 2015, par meghana

  I need to merge 2 video files along with their audio in single file side by side.

  I am able to merge 2 video files in single file but it using audio of first video file only, where as I need to merge audio of second file as well.

  below is command I am using to do that.

  ffmpeg.exe -i input1.webm -vf "[in] scale=iw/2:ih/2, pad=2*iw:ih [left]; movie=input2.webm, scale=iw/2:ih/2 [right]; [left][right] overlay=main_w/2:0 [out]" -b:v 768k ouput.webm

  I have tried various way with amerge but no success. As I am new to FFMpeg, I am not sure how can I achieve this.

  EDIT

  Below is FFMpeg Command I have used for merging both files as suggested by @occvtech , still it is not merging audio of second audio

  ffmpeg.exe -i 3.mp4 -i 4.mp4 -filter_complex "[0:v] scale=iw/2:ih/2,pad=2*iw:ih[left];[1:v]scale=iw/2:ih/2[right];[left][right‌​]overlay=main_w/2:0 [out]" -map [out] -map 0:a -map 1:a -b:v 768k o5.mp4

  Below is console output for command

  ffmpeg version N-72276-gf99fed7 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
  
  enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
  
  ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
  
  le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
  
  able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
  
  ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
  
   --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
  
  e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
  
  ble-decklink --enable-zlib
  
    libavutil      54. 23.101 / 54. 23.101
  
    libavcodec     56. 39.101 / 56. 39.101
  
    libavformat    56. 33.101 / 56. 33.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 16.101 /  5. 16.101
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '3.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.23.106
  
    Duration: 00:00:13.52, start: 0.023220, bitrate: 968 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yu
  
  v420p, 640x480, 889 kb/s, 10 fps, 10 tbr, 10240 tbn, 20 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp,
  
   76 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '4.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.23.106
  
    Duration: 00:00:14.92, start: 0.023220, bitrate: 1049 kb/s
  
      Stream #1:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yu
  
  v420p, 640x480, 971 kb/s, 10 fps, 10 tbr, 10240 tbn, 20 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp,
  
   75 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  [libx264 @ 040d20e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 040d20e0] profile High, level 2.1
  
  [libx264 @ 040d20e0] 264 - core 146 r2538 121396c - H.264/MPEG-4 AVC codec - Cop
  
  yleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb
  
  lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m
  
  e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chro
  
  ma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 i
  
  nterlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
  
  b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=10 scenec
  
  ut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=768 ratetol=1.0 qc
  
  omp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'o5.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.33.101
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x24
  
  0, q=-1--1, 768 kb/s, 10 fps, 10240 tbn, 10 tbc (default)
  
      Metadata:
  
        encoder         : Lavc56.39.101 libx264
  
      Stream #0:1(und): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100
  
  Hz, mono, s16, 128 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
        encoder         : Lavc56.39.101 libvo_aacenc
  
  Stream mapping:
  
    Stream #0:0 (h264) -> scale (graph 0)
  
    Stream #1:0 (h264) -> scale (graph 0)
  
    overlay (graph 0) -> Stream #0:0 (libx264)
  
    Stream #1:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
  
  Press [q] to stop, [?] for help
  
  frame=   27 fps= 26 q=0.0 size=       0kB time=00:00:03.00 bitrate=   0.1kbits/s
  
  frame=   46 fps= 28 q=0.0 size=       0kB time=00:00:04.90 bitrate=   0.1kbits/s
  
  frame=   80 fps= 37 q=16.0 size=     303kB time=00:00:08.29 bitrate= 298.8kbits/
  
  frame=  117 fps= 43 q=15.0 size=     717kB time=00:00:11.99 bitrate= 489.9kbits/
  
  Past duration 0.767570 too large
  
  frame=  137 fps= 39 q=-1.0 Lsize=    1488kB time=00:00:14.94 bitrate= 815.8kbits
  
  /s dup=0 drop=12
  
  video:1247kB audio:234kB subtitle:0kB other streams:0kB global headers:0kB muxin
  
  g overhead: 0.504372%
  
  [libx264 @ 040d20e0] frame I:1     Avg QP:10.60  size: 30577
  
  [libx264 @ 040d20e0] frame P:36    Avg QP:10.78  size: 20384
  
  [libx264 @ 040d20e0] frame B:100   Avg QP:15.41  size:  5116
  
  [libx264 @ 040d20e0] consecutive B-frames:  0.7%  0.0% 17.5% 81.8%
  
  [libx264 @ 040d20e0] mb I  I16..4: 13.2% 49.8% 37.0%
  
  [libx264 @ 040d20e0] mb P  I16..4:  0.8% 10.7%  1.9%  P16..4: 17.7% 30.4% 29.0%
  
   0.0%  0.0%    skip: 9.6%
  
  [libx264 @ 040d20e0] mb B  I16..4:  0.0%  1.1%  0.0%  B16..8: 27.0% 20.2% 10.1%
  
   direct:15.3%  skip:26.3%  L0:35.6% L1:31.1% BI:33.3%
  
  [libx264 @ 040d20e0] final ratefactor: 13.38
  
  [libx264 @ 040d20e0] 8x8 transform intra:77.9% inter:38.4%
  
  [libx264 @ 040d20e0] coded y,uvDC,uvAC intra: 96.3% 97.8% 97.5% inter: 46.4% 68.
  
  0% 41.1%
  
  [libx264 @ 040d20e0] i16 v,h,dc,p: 44%  4%  7% 44%
  
  [libx264 @ 040d20e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 41% 10% 19%  3%  6%  5%  5%
  
   6%  5%
  
  [libx264 @ 040d20e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 16%  9%  5% 12% 10%  9%
  
   7%  6%
  
  [libx264 @ 040d20e0] i8c dc,h,v,p: 66% 12% 12% 10%
  
  [libx264 @ 040d20e0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 040d20e0] ref P L0: 46.3% 12.0% 28.7% 13.0%
  
  [libx264 @ 040d20e0] ref B L0: 81.1% 16.0%  2.9%
  
  [libx264 @ 040d20e0] ref B L1: 93.2%  6.8%
  
  [libx264 @ 040d20e0] kb/s:745.10

• Why when using ffmpeg to create in real time avi video file from images the avi file is playing with purple noisy color ?

  30 juin 2015, par Brubaker Haim

  This is my Ffmpeg class i did some time ago

  using System;
  
  using System.Windows.Forms;
  
  using System.Collections.Generic;
  
  using System.Linq;
  
  using System.Text;
  
  using System.Threading.Tasks;
  
  using System.Drawing;
  
  using System.IO.Pipes;
  
  using System.Runtime.InteropServices;
  
  using System.Diagnostics;
  
  using System.IO;
  
  using DannyGeneral;
  
  
  
  namespace Manager
  
  {
  
      class Ffmpeg
  
      {
  
          NamedPipeServerStream p;
  
          String pipename = "mytestpipe";
  
          System.Diagnostics.Process process;
  
          string ffmpegFileName = "ffmpeg.exe";
  
          string workingDirectory;
  
  
  
          public Ffmpeg()
  
          {
  
              workingDirectory = Path.GetDirectoryName(Application.ExecutablePath);
  
              Logger.Write("workingDirectory: " + workingDirectory);
  
              if (!Directory.Exists(workingDirectory))
  
              {
  
                  Directory.CreateDirectory(workingDirectory);
  
              }
  
              ffmpegFileName = Path.Combine(workingDirectory, ffmpegFileName);
  
              Logger.Write("FfmpegFilename: " + ffmpegFileName);
  
          }
  
  
  
          public void Start(string pathFileName, int BitmapRate)
  
          {
  
              try
  
              {
  
  
  
                  string outPath = pathFileName;
  
                  p = new NamedPipeServerStream(pipename, PipeDirection.Out, 1, PipeTransmissionMode.Byte);
  
  
  
                  ProcessStartInfo psi = new ProcessStartInfo();
  
                  psi.WindowStyle = ProcessWindowStyle.Hidden;
  
                  psi.UseShellExecute = false;
  
                  psi.CreateNoWindow = false;
  
                  psi.FileName = ffmpegFileName;
  
                  psi.WorkingDirectory = workingDirectory;
  
                  psi.Arguments = @"-f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r " + BitmapRate + " " + outPath;
  
                  process = Process.Start(psi);
  
                  process.EnableRaisingEvents = false;
  
                  psi.RedirectStandardError = true;
  
                  p.WaitForConnection();
  
              }
  
              catch (Exception err)
  
              {
  
                  Logger.Write("Exception Error: " + err.ToString());
  
              }
  
          }
  
  
  
          public void PushFrame(Bitmap bmp)
  
          {
  
              try
  
              {
  
                  int length;
  
                  // Lock the bitmap's bits.
  
                  //bmp = new Bitmap(1920, 1080);
  
                  Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
  
                  //Rectangle rect = new Rectangle(0, 0, 1280, 720);
  
                  System.Drawing.Imaging.BitmapData bmpData =
  
                      bmp.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadOnly,
  
                      bmp.PixelFormat);
  
  
  
                  int absStride = Math.Abs(bmpData.Stride);
  
                  // Get the address of the first line.
  
                  IntPtr ptr = bmpData.Scan0;
  
  
  
                  // Declare an array to hold the bytes of the bitmap.
  
                  //length = 3 * bmp.Width * bmp.Height;
  
                  length = absStride * bmpData.Height;
  
                  byte[] rgbValues = new byte[length];
  
  
  
                  //Marshal.Copy(ptr, rgbValues, 0, length);
  
                  int j = bmp.Height - 1;
  
                  for (int i = 0; i < bmp.Height; i++)
  
                  {
  
                      IntPtr pointer = new IntPtr(bmpData.Scan0.ToInt32() + (bmpData.Stride * j));
  
                      System.Runtime.InteropServices.Marshal.Copy(pointer, rgbValues, absStride * (bmp.Height - i - 1), absStride);
  
                      j--;
  
                  }
  
                  p.Write(rgbValues, 0, length);
  
                  bmp.UnlockBits(bmpData);
  
              }
  
              catch(Exception err)
  
              {
  
                  Logger.Write("Error: " + err.ToString());
  
              }
  
  
  
          }
  
  
  
          public void Close()
  
          {
  
              p.Close();
  
          }
  
      }
  
  }

  And i’m using it in form1 in a button click event :

  private void button1_Click(object sender, EventArgs e)
  
          {
  
              timer1.Start();
  
          }

  the directroy screenshots is where i’m taking a screenshot every 100ms in the timer1 tick event :

      ScreenShot shot = new ScreenShot();
  
      public static int counter = 0;
  
      private void timer1_Tick(object sender, EventArgs e)
  
      {
  
          counter++;
  
          shot.GetScreenShot(@"e:\screenshots\", "screenshot");
  
          if (counter == 1200)
  
          {
  
              timer1.Stop();
  
          }
  
      }

  I’m calling the method PushFrame from inside the ScreenShot class where i save the screenshots.

  Ffmpeg fmpeg;

  Then :

  fmpeg = new Ffmpeg();
  
  fmpeg.Start(@"e:\screenshots\test.avi", 25);

  And :

  public Bitmap GetScreenShot(string folder, string name)
  
      {
  
          _screenShot = new Bitmap(GetScreen());
  
          System.GC.Collect();
  
          System.GC.WaitForPendingFinalizers();
  
          string ingName = folder + name + Elgato_Video_Capture.counter.ToString("D6") + ".bmp";
  
          _screenShot.Save(ingName);
  
          fmpeg.PushFrame(_screenShot);
  
          _screenShot.Dispose();
  
  
  
          return _screenShot;
  
      }

  All the images on the hard disk are fine i can edit/open them and watch them no problems.
  They are also same size.

  The result in the end is one big avi file 1.08 GB size.
  But when i play it i see many windows running inside very fast and all painted with noisy purple color.

  Here a screenshot from the video file when playing it :

  avi file playing screenshot

  I think the problem is somewhere in the Ffmpeg class where i give parameters to the ffmpeg.exe

  psi.Arguments = @"-f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r " + BitmapRate + " " + outPath;

  Not sure what make this avi file to look like that.

  This is the video file the result i got : https://www.youtube.com/watch?v=fdxPus-Xv1k&feature=youtu.be

• Why i'm getting strange video file when using ffmpeg and pipes to create video file in real time ?

  30 juin 2015, par Brubaker Haim

  The goal here is to create a compressed mp4 video file in real time.
  I’m saving screenshots as bitmaps type on my hard disk.
  And i want to create mp4 file and compress the mp4 video file in real time.

  The problem is the end the video file i get looks very strange.
  This is the result : Strange Video File

  The class that i’m using the ffmpeg with arguments.

  using System;
  
  using System.Windows.Forms;
  
  using System.Collections.Generic;
  
  using System.Linq;
  
  using System.Text;
  
  using System.Threading.Tasks;
  
  using System.Drawing;
  
  using System.IO.Pipes;
  
  using System.Runtime.InteropServices;
  
  using System.Diagnostics;
  
  using System.IO;
  
  using DannyGeneral;
  
  
  
  namespace Youtube_Manager
  
  {
  
      class Ffmpeg
  
      {
  
          NamedPipeServerStream p;
  
          String pipename = "mytestpipe";
  
          System.Diagnostics.Process process;
  
          string ffmpegFileName = "ffmpeg.exe";
  
          string workingDirectory;
  
  
  
          public Ffmpeg()
  
          {
  
              workingDirectory = Path.GetDirectoryName(Application.ExecutablePath);
  
              Logger.Write("workingDirectory: " + workingDirectory);
  
              if (!Directory.Exists(workingDirectory))
  
              {
  
                  Directory.CreateDirectory(workingDirectory);
  
              }
  
              ffmpegFileName = Path.Combine(workingDirectory, ffmpegFileName);
  
              Logger.Write("FfmpegFilename: " + ffmpegFileName);
  
          }
  
  
  
          public void Start(string pathFileName, int BitmapRate)
  
          {
  
              try
  
              {
  
  
  
                  string outPath = pathFileName;
  
                  p = new NamedPipeServerStream(pipename, PipeDirection.Out, 1, PipeTransmissionMode.Byte);
  
  
  
                  ProcessStartInfo psi = new ProcessStartInfo();
  
                  psi.WindowStyle = ProcessWindowStyle.Hidden;
  
                  psi.UseShellExecute = false;
  
                  psi.CreateNoWindow = false;
  
                  psi.FileName = ffmpegFileName;
  
                  psi.WorkingDirectory = workingDirectory;
  
                  psi.Arguments = @"-f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r " + BitmapRate + " " + outPath;
  
                  //psi.Arguments = @"-framerate 1/5 -i -c:v libx264 -r 30 -pix_fmt yuv420p \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r" + BitmapRate + " " + outPath;
  
                  process = Process.Start(psi);
  
                  process.EnableRaisingEvents = false;
  
                  psi.RedirectStandardError = true;
  
                  p.WaitForConnection();
  
              }
  
              catch (Exception err)
  
              {
  
                  Logger.Write("Exception Error: " + err.ToString());
  
              }
  
          }
  
  
  
          public void PushFrame(Bitmap bmp)
  
          {
  
              try
  
              {
  
                  int length;
  
                  // Lock the bitmap's bits.
  
                  //bmp = new Bitmap(1920, 1080);
  
                  Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
  
                  //Rectangle rect = new Rectangle(0, 0, 1280, 720);
  
                  System.Drawing.Imaging.BitmapData bmpData =
  
                      bmp.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadOnly,
  
                      bmp.PixelFormat);
  
  
  
                  int absStride = Math.Abs(bmpData.Stride);
  
                  // Get the address of the first line.
  
                  IntPtr ptr = bmpData.Scan0;
  
  
  
                  // Declare an array to hold the bytes of the bitmap.
  
                  //length = 3 * bmp.Width * bmp.Height;
  
                  length = absStride * bmpData.Height;
  
                  byte[] rgbValues = new byte[length];
  
  
  
                  //Marshal.Copy(ptr, rgbValues, 0, length);
  
                  int j = bmp.Height - 1;
  
                  for (int i = 0; i < bmp.Height; i++)
  
                  {
  
                      IntPtr pointer = new IntPtr(bmpData.Scan0.ToInt32() + (bmpData.Stride * j));
  
                      System.Runtime.InteropServices.Marshal.Copy(pointer, rgbValues, absStride * (bmp.Height - i - 1), absStride);
  
                      j--;
  
                  }
  
                  p.Write(rgbValues, 0, length);
  
                  bmp.UnlockBits(bmpData);
  
              }
  
              catch(Exception err)
  
              {
  
                  Logger.Write("Error: " + err.ToString());
  
              }
  
  
  
          }
  
  
  
          public void Close()
  
          {
  
              p.Close();
  
          }
  
      }
  
  }

  Then i’m using the method PushFrame here in this class :

  public Bitmap GetScreenShot(string folder, string name)
  
      {
  
          _screenShot = new Bitmap(GetScreen());
  
          System.GC.Collect();
  
          System.GC.WaitForPendingFinalizers();
  
          string ingName = folder + name +  images.counter.ToString("D6") + ".bmp";
  
          _screenShot.Save(ingName,System.Drawing.Imaging.ImageFormat.Bmp);
  
          fmpeg.PushFrame(_screenShot);
  
          _screenShot.Dispose();
  
  
  
          return _screenShot;
  
      }

  The Bitmaps on the hard disk are fine i can edit/open see them.
  When using command prompt and manually type ffmpeg command it does compress and create a mp4 video file.

  But when using the Ffmpeg class i did with the PushFrame method it’s creating this strange video file.

  This is a link for my OneDrive with 10 screenshots images files for testing :

  screenshots rar

  Sample screenshot from the video file when playing the video file :
  Looks very choppy. The Bitmaps on the hard disk each one is 1920x1080 and Bit depth 32

  But it dosen’t look like that in the video file :

  

  This is the arguments i’m using :

  psi.Arguments = @"-f rawvideo -vcodec rawvideo -pix_fmt rgb24 -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r " + BitmapRate + " " + outPath;

  The video size is very small 1.24 MB