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• how to pass a audio file with powershell pipe [duplicate]

  9 février 2020, par mudssky

  I’m trying to convert flac file to aac use qaac cli.
  qaac cli default don’t support flac file,so i use ffmpeg to convert it to wav ,and use pipe pass it to qaac

  this command can be run successfully in cmd
  ffmpeg.exe  -i .\input.flac  -f wav -| qaac64.exe -

  but in powershell ,the pipe passed string object,so it doesnt’t work properly
  ffmpeg.exe  -i .\input.flac  -f wav -| get-member

  Q : what’s the correct way in powershell to pass a file ?

• Pipe series of images from java application to ffmpeg subprocess

  20 juin 2014, par Marco

  I am looking for a way to stream series of images (jpegs) from java application into FFMpeg STDIN pipe.
  FFMpeg should process these images and create a video file as an output.

  FFMpeg is executed as sub process of java application with the following command "ffmpeg.exe -i pipe:0 out.avi"

  When i run "ffmpeg -i input.jpg out.avi" command in the console, i get the "out.avi" file as expected

  But when i use the following tester code in my java application, i got an error.

  Code in Java application :

  File ffmpeg_output_msg = new File("ffmpeg_output_msg.txt");
  
  ProcessBuilder pb = new ProcessBuilder(
  
          "ffmpeg.exe","-i","pipe:0","out.avi");
  
  pb.redirectErrorStream(true);
  
  pb.redirectOutput(ffmpeg_output_msg);
  
  pb.redirectInput(ProcessBuilder.Redirect.PIPE);
  
  Process p = pb.start();
  
  OutputStream ffmpegInput = p.getOutputStream();
  
  
  
  byte[] image;
  
  File file = new File("input.jpg");
  
  image = new byte[(int)file.length()];
  
  
  
  FileInputStream fileInputStream = new FileInputStream(file);
  
  fileInputStream.read(image);
  
  
  
  ImageInputStream iis = ImageIO.createImageInputStream(
  
          new ByteArrayInputStream(image));
  
  BufferedImage img = ImageIO.read(iis);
  
  
  
  ImageIO.write(img, "JPEG", ffmpegInput);

  FFMpeg output :

  ffmpeg version N-59664-g94cf4f8 Copyright (c) 2000-2014 the FFmpeg developers built on Jan 7 2014 22:07:02 with gcc 4.8.2 (GCC)
  configuration : —enable-gpl —enable-version3 —disable-w32threads —enable-avisynth —enable-bzlib —enable-fontconfig —enable-frei0r —enable-gnutls —enable-iconv —enable-libass —enable-libbluray —enable-libcaca —enable-libfreetype —enable-libgsm —enable-libilbc —enable-libmodplug —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libschroedinger —enable-libsoxr —enable-libspeex —enable-libtheora —enable-libtwolame —enable-libvidstab —enable-libvo-aacenc —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libx264 —enable-libxavs —enable-libxvid —enable-zlib

  libavutil      52. 62.100 / 52. 62.100
  
  libavcodec     55. 47.100 / 55. 47.100
  
  libavformat    55. 22.102 / 55. 22.102
  
  libavdevice    55.  5.102 / 55.  5.102
  
  libavfilter     4.  0.103 /  4.  0.103
  
  libswscale      2.  5.101 /  2.  5.101
  
  libswresample   0. 17.104 /  0. 17.104
  
  libpostproc    52.  3.100 / 52.  3.100

  pipe: : Invalid data found when processing input

  Any ideas how to make it work ?

  Thank you very much for your time.

• AVPlayer does not play MPEGTS stream generated by FFMPEG and gives error while writing to socket 9 : Broken pipe (32)

  29 mars 2020, par Farooq Nasim Ahmad

  If I generate an MPEGTS stream with following command using FFMPEG

  ./ffmpeg  -i test5seconds.mov -g 60 -hls_time 2 -c:v libx264 -profile:v baseline  -level 3.0 -framerate 30  see.m3u8

  It is successfully played by AVPlayer. But if I generate stream through following command send on UDP and then record.

  ./ffmpeg  -i test5seconds.mov -g 60 -framerate 25  -c:v libx264 -profile:v baseline  -level 3.0 -framerate 30 -f mpegts "udp://192.168.8.137:1234?pkt_size=1316"

  The AVPlayer gives following error "Error while writing to socket 9 : Broken pipe (32)".