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• error when add arabic text to video ffmpeg c#

  28 décembre 2020, par Fath Bakri

  i want to add Arabic annotation or text to video, i use ffmpeg version 4.3.1 in win 32 bit, here my code in c# :

  


  private string AddVideo_Annotation(string text,int X,int Y)
        {
            try
            {

                string FFmpegPath = Utils.GetEXE_FFmpegPath();
                string path = Utils.GetProgramPath();
                //store outcome of process
                var errors = new StringBuilder();
                var output = new StringBuilder();
                var hadErrors = false;

                Process pdfprocess = new Process();

                
                //pdfprocess.StartInfo.LoadUserProfile = true;
                pdfprocess.StartInfo.RedirectStandardOutput = true;
                pdfprocess.StartInfo.RedirectStandardError = true;
                pdfprocess.StartInfo.UseShellExecute = false;
                
                pdfprocess.StartInfo.FileName = FFmpegPath;
                //text_shaping=1
                pdfprocess.StartInfo.Arguments = "-i \""+filePath+ "\" -vf -enable-libfribidi drawtext=\"text_shaping=1:text=\'" + text+ "\':x=" + X+":y="+Y+ ":fontsize=24:fontcolor=Red\"  -c:a copy \"" + path + "\\out.mp4\"";
               
                //pdfprocess.StartInfo.WorkingDirectory = @"C:\Program Files\LibreOffice\program\";
                pdfprocess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;

                pdfprocess.EnableRaisingEvents = true;

                // capture normal output
                pdfprocess.OutputDataReceived += (s, d) => {
                    output.Append(d.Data);
                };

                // Capture error output
                pdfprocess.ErrorDataReceived += (s, d) => {
                    if (!hadErrors)
                    {
                        hadErrors = !String.IsNullOrEmpty(d.Data);
                    }
                    errors.Append(d.Data);
                };
                pdfprocess.Start();
                pdfprocess.BeginErrorReadLine();
                pdfprocess.BeginOutputReadLine();
                try
                {
                    while (pdfprocess.MainWindowHandle == IntPtr.Zero)
                    {
                        // Discard cached information about the process
                        // because MainWindowHandle might be cached.
                        pdfprocess.Refresh();
                        
                        Thread.Sleep(200);

                    }
                }
                catch { }
                Thread.Sleep(2000);
                pdfprocess.WaitForExit();
                while ((Process.GetProcessesByName("ffmpeg").Length > 0))
                {
                    Thread.Sleep(200);
                }


                string stderr = errors.ToString();

                if (pdfprocess.ExitCode != 0)
                {
                    //MessageBox.Show("error:" + stderr);

                    throw new Exception("FFmpeg.exe has exit wit code " + pdfprocess.ExitCode+"\n"+ stderr);
                }
                return path + "\\out"+new FileInfo( filePath).Extension;
            }
            catch(Exception ex)
            {
                TXT_AnnotationText.Text = ex.Message + "\n" + ex.StackTrace.ToString();
                MessageBox.Show(ex.Message + "\n" + ex.StackTrace.ToString());
                throw ex;
            }
        }



  


  i get this error message :

  
FFmpeg.exe has exit wit code 1
ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.1 (GCC) 20200726 configuration : —enable-gpl —enable-version3 —enable-sdl2 —enable-fontconfig —enable-gnutls —enable-iconv —enable-libass —enable-libdav1d —enable-libbluray —enable-libfreetype —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libopus —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libsrt —enable-libtheora —enable-libtwolame —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxml2 —enable-libzimg —enable-lzma —enable-zlib —enable-gmp —enable-libvidstab —enable-libvmaf —enable-libvorbis —enable-libvo-amrwbenc —enable-libmysofa —enable-libspeex —enable-libxvid —enable-libaom —enable-libgsm —disable-w32threads —enable-libmfx —enable-ffnvcodec —enable-cuda-llvm —enable-cuvid —enable-d3d11va —enable-nvenc —enable-nvdec —enable-dxva2 —enable-avisynth —enable-libopenmpt —enable-amf libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D :\a.mp4' : Metadata : major_brand : mp42 minor_version : 0 compatible_brands : isommp42 creation_time : 2020-12-02T01:57:02.000000Z Duration : 00:01:37.70, start : 0.000000, bitrate : 125 kb/s Stream #0:0(eng) : Video : h264 (Main) (avc1 / 0x31637661), yuv420p(tv), 1280x662 [SAR 1:1 DAR 640:331], 124 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc (default) Metadata : creation_time : 2020-12-02T01:57:03.000000Z handler_name : Mainconcept MP4 Video Media Handler encoder : AVC Coding[NULL @ 05d306c0] Unable to find a suitable output format for 'drawtext=text_shaping=1:text='ظٹظ„ظٹظٹظ„ ظٹظ„ظٹط¨ظ„':x=200:y=200:fontsize=24:fontcolor=Red'drawtext=text_shaping=1:text='ظٹظ„ظٹظٹظ„ ظٹظ„ظٹط¨ظ„':x=200:y=200:fontsize=24:fontcolor=Red : Invalid argument
at EasyWhatsappSender.UserControls.UControl_VideoAudioPreview_Annotation.AddVideo_Annotation(String text, Int32 X, Int32 Y) in C :\Users\FathBakri\Documents\Visual Studio 2017\Projects\MediaViewer\UserControls\UControl_VideoAudioPreview_Annotation.cs:line 239

  
the error happen when i use text_shaping=1 , if i omit it and use Arabic text it display in symbols and not correct
how to fix it. Thanks for help

  


• How to use ffmpeg in nodejs to merge .m4a and .m4v in .mkv

  30 juin 2019, par Rodrigo

  I’m using the script below to download vimeo’s streaming.

  • https://gist.github.com/mistic100/895f6d17b1e193334882a4c37d0d7748 *

  The problem is that the script downloads the various .m4s fragments and creates an .m4a file for audio and .m4v for video. So I have to use the ffmpeg command manually through cmd to merge them into a single .mkv file

  I would like to add a command line in the script so that it would be done automatically. I’ve tried several different commands and combinations between them like .exec, .execFile, .spawn, all unsuccessful

  Same examples :

  1)using execFile

  const child = execFile('ffmpeg', ['-i', 'input.m4v' , '-i' , 'input.m4a' , '-c' , 'copy' , 'output.mkv' ], (error, stdout, stderr) => {
  
      if (error) {
  
          console.error('stderr: =============================', stderr);
  
          throw error;
  
      }
  
      console.log('stdout: ==========================', stdout);
  
  });
  
  
  
  console.log('here');

  2)using exec

  const child = exec('ffmpeg', ['-i', 'input.m4v' , '-i' , 'input.m4a' , '-c' , 'copy' , 'output.mkv', (error, stdout, stderr) => {
  
      if (error) {
  
          console.error('stderr: =============================', stderr);
  
          throw error;
  
      }
  
      console.log('stdout: ==========================', stdout);
  
  });
  
  
  
  console.log('here');

  3)using spawn

  var cmd = 'D:\vimeo\ffmpeg';
  
  
  
  var args = [
  
      '-i', 'D:\vimeo\input.m4a',
  
      '-i', 'D:\vimeo\input.m4v', 
  
      '-c', 'copy', 'D:\vimeo\output.mkv'
  
  ];
  
  
  
  var proc = spawn(cmd, args);
  
  
  
  proc.stdout.on('data', function(data) {
  
      console.log(data);
  
  });
  
  
  
  proc.stderr.on('data', function(data) {
  
      console.log(data);
  
  });
  
  
  
  proc.on('close', function() {
  
      console.log('finished');
  
  });

  What am I doing wrong ?

  ---

  The error mesangens are

  1)

  D:\vimeo\vimeo-downloader.js:94
  
  const child = execFile('ffmpeg', ['-i', 'input.m4v' , '-i' , 'input.m4a' , '-c' , 'copy' , 'output.mkv' ], (error, stdout, stderr) => {
  
                ^
  
  
  
  ReferenceError: execFile is not defined
  
      at Object.<anonymous> (D:\vimeo\vimeo-downloader.js:94:15)
  
      at Module._compile (internal/modules/cjs/loader.js:776:30)
  
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
  
      at Module.load (internal/modules/cjs/loader.js:653:32)
  
      at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
  
      at Function.Module._load (internal/modules/cjs/loader.js:585:3)
  
      at Function.Module.runMain (internal/modules/cjs/loader.js:829:12)
  
      at startup (internal/bootstrap/node.js:283:19)
  
      at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
  
  </anonymous>

  2)

  D:\vimeo\vimeo-downloader.js:100
  
  });
  
   ^
  
  
  
  SyntaxError: Unexpected token )
  
      at Module._compile (internal/modules/cjs/loader.js:721:23)
  
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
  
      at Module.load (internal/modules/cjs/loader.js:653:32)
  
      at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
  
      at Function.Module._load (internal/modules/cjs/loader.js:585:3)
  
      at Function.Module.runMain (internal/modules/cjs/loader.js:829:12)
  
      at startup (internal/bootstrap/node.js:283:19)
  
      at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)

  3)

  D:\vimeo\vimeo-downloader.js:102
  
  var proc = spawn(cmd, args);
  
             ^
  
  
  
  ReferenceError: spawn is not defined
  
      at Object.<anonymous> (D:\vimeo\vimeo-downloader.js:102:12)
  
      at Module._compile (internal/modules/cjs/loader.js:776:30)
  
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
  
      at Module.load (internal/modules/cjs/loader.js:653:32)
  
      at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
  
      at Function.Module._load (internal/modules/cjs/loader.js:585:3)
  
      at Function.Module.runMain (internal/modules/cjs/loader.js:829:12)
  
      at startup (internal/bootstrap/node.js:283:19)
  
      at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)   
  
  </anonymous>

• ffmpeg record before and after applying filters

  7 mai 2019, par Mark

  I’m trying to use ffmpeg to do the following things :

  • acquire input streaming [OK]
  • save to disk the video as is [TODO]
  • apply filter, i.e. drawtext [OK]
  • save to disk the overlayed video [OK]
  • preview the overlayed video [OK]

  Here my current command line :

  ffmpeg -rtsp_transport tcp -i  -vf "[in]drawtext=textfile='text.txt': reload=1: font=arial: fontcolor=red: fontsize=80: box=1: boxcolor=yellow@0.5: boxborderw=5: x=(w-text_w)/2: y=(h-text_h)/2[out]" -vcodec libx264 -f tee -map 0:v "[f=mp4]test.mp4|[f=nut]pipe:" | ffplay pipe:

  The only thing I don’t understand how to do is the recording of the video before drawtext. I guess I have to create another tee :

  INPUT ---> TEE ---->RECORD
  
                  |
  
                  |-->FILTERS---> TEE ---->RECORD
  
                                       |
  
                                       |-->PLAY

  So I tried with this cumbersome command :

  ffmpeg -rtsp_transport tcp -i  -vcodec libx264 -f tee -map 0:v "[f=mp4]before.mp4|[f=nut]pipe:" | ffmpeg -f mp4 -i pipe: -vf "[in]drawtext=textfile='text.txt': reload=1: font=arial: fontcolor=red: fontsize=80: box=1: boxcolor=yellow@0.5: boxborderw=5: x=(w-text_w)/2: y=(h-text_h)/2[out]" -vcodec libx264 -f tee -map 0:v "[f=mp4]after.mp4|[f=nut]pipe:" | ffplay pipe:

  It doesn’t throw errors, records "before.mp4" but neither "after.mp4" nor the preview are working. Surely I forgot something in the syntax.