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• Place two videos side by side using ffmpeg ?and download it as one file

  5 août 2019, par marceloo1223

  I have two video files, which I want to play side by side and download them later. I used FFMPEG to merge them as one :

  protected void combinetwovideo()
  
  {
  
      string strParam;
  
      string Path_FFMPEG = Path.Combine(HttpContext.Current.Server.MapPath(ConfigurationManager.AppSettings["FFMpegPath"]));
  
      string apppath=HttpRuntime.AppDomainAppPath;
  
      //Merging two videos               
  
      String video1=apppath+"\\recordings\\client2019-08-03 02_23_59";
  
      String video2 =apppath+"\\userrecord\\User2019-08-03 02_24_00";
  
      String strResult =apppath+"\\RESULT\\";
  
      strParam = string.Format("-i ('" + video1 + "') -i ('" + video2 + "') -filter_complex \'[0:v]pad=iw*2:ih[int];[int][1:v]overlay=W/2:0[vid]' /-map [vid] -c:v libx264 -crf 23 -preset veryfast output.mp4");
  
      process(Path_FFMPEG, strParam);
  
  }

   public void process(string Path_FFMPEG, string strParam)
  
   {
  
      try
  
      {
  
          Process ffmpeg = new Process();
  
          ProcessStartInfo ffmpeg_StartInfo = new ProcessStartInfo(Path_FFMPEG, strParam);
  
          ffmpeg_StartInfo.UseShellExecute = false;
  
          ffmpeg_StartInfo.RedirectStandardError = true;
  
          ffmpeg_StartInfo.RedirectStandardOutput = true;
  
          ffmpeg.StartInfo = ffmpeg_StartInfo;
  
          ffmpeg_StartInfo.CreateNoWindow = true;
  
          ffmpeg.EnableRaisingEvents = true;
  
          ffmpeg.Start();
  
          ffmpeg.WaitForExit();
  
          ffmpeg.Close();
  
          ffmpeg.Dispose();
  
          ffmpeg = null;
  
      }
  
      catch (Exception ex)
  
      {
  
      }
  
  }

  But this method outputs nothing and does not throw any errors. I’m confused about the strParam query. Did I write it wrong or am I missing something. Any help would be apreciated.

• How to read percentage from ffmpeg command in java ?

  23 juillet 2019, par Prasab R

  I am trying to convert video file to specific format by executing ffmpeg command. In that process I want to read percentage by using timepattern format. Somehow I am not able to do it.

  I have tried using the below code. Specially I am getting null in the while loop condition.

  import java.io.*;
  
  import java.util.Scanner;
  
  import java.util.regex.Pattern;
  
  
  
  class Test {
  
    public static void main(String[] args) throws IOException {
  
      ProcessBuilder pb = new ProcessBuilder("ffmpeg","-i","in.webm","out.mp4");
  
      final Process p = pb.start();
  
  
  
      new Thread() {
  
        public void run() {
  
  
  
          Scanner sc = new Scanner(p.getErrorStream());
  
  
  
          // Find duration
  
          Pattern durPattern = Pattern.compile("(?<=Duration: )[^,]*");
  
          String dur = sc.findWithinHorizon(durPattern, 0);
  
          if (dur == null)
  
            throw new RuntimeException("Could not parse duration.");
  
          String[] hms = dur.split(":");
  
          double totalSecs = Integer.parseInt(hms[0]) * 3600
  
                           + Integer.parseInt(hms[1]) *   60
  
                           + Double.parseDouble(hms[2]);
  
          System.out.println("Total duration: " + totalSecs + " seconds.");
  
  
  
          // Find time as long as possible.
  
          Pattern timePattern = Pattern.compile("(?<=time=)[\\d.]*");
  
          String match;
  
          while (null != (match = sc.findWithinHorizon(timePattern, 0))) {
  
            double progress = Double.parseDouble(match) / totalSecs;
  
            System.out.printf("Progress: %.2f%%%n", progress * 100);
  
          }
  
        }
  
      }.start();
  
  
  
    }
  
  }

  I am expecting a value in the while condition, but it coming as null.enter code here

• how to fix "FFmpeg cannot edit existing files in-place."-Problem in Java

  7 juillet 2019, par Suione

  I am trying to write an audio file to an existing videofile. Unfortunately I get the Logmessage, that I cannot edit existing files in-place.

  I have found some threads about the so called muxing between video and audio, but none of them could help me out really. Maybe some one of you can.
  Further this isn`t my could either. I am only the one who needs to use it, so I have to fix it.

  Thanks for your help

  String[] args = { FFMPEG_FILE.getAbsolutePath(), "-y", "-i", videoPath, "-ss", String.valueOf(-offset.toFrames() / 50.0f), "-i", audioPath, "-c", "copy", "-map", "0:v", "-map","1:a", "-bsf:v", "h264_mp4toannexb","-r", String.valueOf(project.getFramerate()), "-shortest",outputPath };
  
  
  
  ProcessBuilder pb = new ProcessBuilder(args).inheritIO();
  
  Process p = pb.start();
  
  int exit = p.waitFor();
  
  if (exit != 0) {
  
       throw new IOException("ffmpeg terminated with a failure");
  
  }

  EDIT : As someone commented outputPath was same same as videopath. So switched it to another, so this problem would not appear again. But I still have no sound in my outputvideos. I give you the LOG-information, so maybe you can read something out of it.

  INFO: start ffmpeg: [C:\Program Files\ffmpeg\bin\ffmpeg.exe, -y, -i, C:\Users\USERNAME\Desktop\Test_Workflow\1.mkv, -ss, 0.0, -i, C:\Users\USERNAME\Desktop\Test\resources/videos/P1000501.MP4\audio.ogg, -c, copy, -map, 0:v, -map, 1:a, -bsf:v, h264_mp4toannexb, -r, 25, -shortest, C:\Users\USERNAME\Desktop\Test\testoutput.mp4]
  
  ffmpeg version N-92087-gdcbd89e000 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 8.2.1 (GCC) 20180813
  
    configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --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-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  
    libavutil      56. 19.101 / 56. 19.101
  
    libavcodec     58. 31.102 / 58. 31.102
  
    libavformat    58. 18.104 / 58. 18.104
  
    libavdevice    58.  4.105 / 58.  4.105
  
    libavfilter     7. 33.100 /  7. 33.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
    libpostproc    55.  2.100 / 55.  2.100
  
  Input #0, matroska,webm, from 'C:\Users\USERNAME\Desktop\Test_Workflow\1.mkv':
  
    Metadata:
  
      ENCODER         : Lavf56.4.101
  
    Duration: 00:00:04.60, start: 0.080000, bitrate: 1377 kb/s
  
      Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
  
  Input #1, ogg, from 'C:\Users\USERNAME\Desktop\Test\resources/videos/P1000501.MP4\audio.ogg':
  
    Duration: 00:04:20.65, start: 0.000000, bitrate: 86 kb/s
  
      Stream #1:0(und): Audio: vorbis, 48000 Hz, stereo, fltp, 112 kb/s
  
      Metadata:
  
        CREATION_TIME   : 2018-11-09T13:20:07.000000Z
  
        LANGUAGE        : und
  
        ENCODER         : Lavc58.31.102 libvorbis
  
        MAJOR_BRAND     : mp42
  
        MINOR_VERSION   : 1
  
        COMPATIBLE_BRANDS: mp42avc1
  
  [mp4 @ 000001e67c0a00c0] track 1: codec frame size is not set
  
  Output #0, mp4, to 'C:\Users\USERNAME\Desktop\Test\testoutput.mp4':
  
    Metadata:
  
      encoder         : Lavf58.18.104
  
      Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
  
      Stream #0:1(und): Audio: vorbis (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 112 kb/s
  
      Metadata:
  
        CREATION_TIME   : 2018-11-09T13:20:07.000000Z
  
        LANGUAGE        : und
  
        ENCODER         : Lavc58.31.102 libvorbis
  
        MAJOR_BRAND     : mp42
  
        MINOR_VERSION   : 1
  
        COMPATIBLE_BRANDS: mp42avc1
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #1:0 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=  113 fps=0.0 q=-1.0 Lsize=     824kB time=00:00:04.41 bitrate=1530.8kbits/s speed= 634x    
  
  video:772kB audio:43kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 1.092082%