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• FFMPEG dshow format not working Windows 10

  22 octobre 2016, par Jonathan Beaudoin

  I’d like to use this library for my remote desktop software but it does not seem to be working. It works fine if I run ffmpeg from command line.

  Here is my test class :

  public class FFMPEG {
  
  
  
      public static void main(String[] args) throws Exception {
  
          FFmpegFrameGrabber grabber = new FFmpegFrameGrabber("video=\"screen-capture-recorder\"");
  
          grabber.setFormat("dshow");
  
          grabber.setImageWidth(2560);
  
          grabber.setImageHeight(1440);
  
          grabber.start();
  
  
  
          CanvasFrame frame = new CanvasFrame("Screen Capture");
  
          while (frame.isVisible()) {
  
              frame.showImage(grabber.grab());
  
          }
  
          frame.dispose();
  
          grabber.stop();
  
      }
  
  
  
  }

  and here is what I have in my gradle.build

  repositories {
  
      mavenCentral()
  
  }
  
  
  
  configurations {
  
      all*.exclude group: 'org.bytedeco', module: 'javacpp-presets'
  
  }
  
  
  
  dependencies {
  
      compile "org.bytedeco:javacv:1.2"
  
      compile "org.bytedeco:javacpp:1.2.1"
  
  
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '3.1.2-1.2'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '3.1.2-1.2', classifier: 'windows-x86_64'
  
  }

  Here is the error I get when running that class :

  Exception in thread "main" org.bytedeco.javacv.FrameGrabber$Exception: avformat_open_input() error -5: Could not open input "video="screen-capture-recorder"". (Has setFormat() been called?)
  
      at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:437)
  
      at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:385)
  
      at FFMPEG.main(FFMPEG.java:14)
  
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  
      at java.lang.reflect.Method.invoke(Method.java:498)
  
      at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
  
  [dshow @ 000000000179c5e0] Could not enumerate video devices (or none found).
  
  [dshow @ 000000000179c5e0] Could not enumerate video devices (or none found)

• ffmpeg Error : Pattern type 'glob' was selected but globbing is not support ed by this libavformat build

  20 juillet 2015, par Aryan Naim

  I’m trying to convert group of ".jpg" files acting as individual frames into 1 single mpeg video ".mp4"

  Example parameters i used :

  frame duration =2 secs

  frame rate =30 fps

  encoder = libx264 (mpeg)

  input pattern = "*.jpg"

  output pattern = video.mp4

  Based on ffmpeg wiki instructions at (https://trac.ffmpeg.org/wiki/Create%20a%20video%20slideshow%20from%20images), I issued this command :

  ffmpeg -framerate 1/2 -pattern_type glob -i "*.jpg" -c:v libx264 -r 30 -pix_fmt yuv420p video.mp4

  Im getting this error :

  [image2 @ 049ab120] Pattern type ’glob’ was selected but globbing is not support
  ed by this libavformat build
  *.jpg : Function not implemented

  Which probably means the API pattern matching commands for my build/version have changed. By the way this my windows 32bit ffmpeg download build # ffmpeg-20150702-git-03b2b40-win32-static.

  How can I choose a group of files using pattern matching using ffmpeg ?

  Thanks

• How can I call m3u8 with multiple audio

  26 février 2020, par desmeit

  I have the following playlist.m3u8 with multiple audio :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  
  
  #EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio",LANGUAGE="fr",NAME="France",AUTOSELECT=NO,URI="fr/test.m3u8"
  
   #EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio",LANGUAGE="en",NAME="English",AUTOSELECT=NO,URI="en/test.m3u8"
  
  
  
  #EXT-X-STREAM-INF:BANDWIDTH=800000,RESOLUTION=360x640,AUDIO="audio"
  
  640p.m3u8
  
  #EXT-X-STREAM-INF:BANDWIDTH=1400000,RESOLUTION=480x842,AUDIO="audio"
  
  842p.m3u8
  
  #EXT-X-STREAM-INF:BANDWIDTH=2800000,RESOLUTION=720x1280,AUDIO="audio"
  
  1280p.m3u8
  
  #EXT-X-STREAM-INF:BANDWIDTH=5000000,RESOLUTION=1080x1920,AUDIO="audio"
  
  1920p.m3u8

  if I only call the URL http://XXX.playlist.m3u8, the french audio file is played automatically. I know that the selection of the language in the native player at Apple is displayed like this :

  

  Is there an additional possibility to select the language for example by parameters ?

  http://XXX.playlist.m3u8?LANGUAGE=DE for example

  And is it possible to run two audio files in parallel ?