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• FFmpeg avformat_open_input not working : Invalid data found when processing input

  2 novembre 2016, par John_Sheares

  This is my first time using FFmpeg. Every type of media file that I try to open with avformat_open_input, returns "Invalid data found when processing input". I am using 32bit FFmpeg Build Version : 92de2c2. I setup my VS2015 project according to this answer : Use FFmpeg in Visual Studio. What could be going wrong with this code ?

  #include "stdafx.h"
  
  #include 
  
  
  
  extern "C"
  
  {
  
      #include "libavcodec/avcodec.h"
  
      #include <libavformat></libavformat>avformat.h>
  
      #include <libavutil></libavutil>avutil.h>
  
  }
  
  
  
  int main(int argc, char *argv[])
  
  {
  
      AVFormatContext *pFormatCtx = NULL;
  
      avcodec_register_all();
  
  
  
      const char* filename = "d:\\a.mp4";
  
      int ret = avformat_open_input(&amp;pFormatCtx, filename, NULL, NULL);
  
      if (ret != 0) {
  
          char buff[256];
  
          av_strerror(ret, buff, 256);
  
          printf(buff);
  
          return -1;
  
      }
  
  }

• 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 avformat_open_input not working

  30 septembre 2016, par John_Sheares

  This is my first time using FFmpeg. Every type of media file that I try to open with avformat_open_input, returns "Invalid data found when processing input". I am using 32bit FFmpeg Build Version : 92de2c2. I setup my VS2015 project according to this answer : Use FFmpeg in Visual Studio. What could be going wrong with this code ?

  #include "stdafx.h"
  
  #include 
  
  
  
  extern "C"
  
  {
  
      #include "libavcodec/avcodec.h"
  
      #include <libavformat></libavformat>avformat.h>
  
      #include <libavutil></libavutil>avutil.h>
  
  }
  
  
  
  int main(int argc, char *argv[])
  
  {
  
      AVFormatContext *pFormatCtx = NULL;
  
      avcodec_register_all();
  
  
  
      const char* filename = "d:\\a.mp4";
  
      int ret = avformat_open_input(&amp;pFormatCtx, filename, NULL, NULL);
  
      if (ret != 0) {
  
          char buff[256];
  
          av_strerror(ret, buff, 256);
  
          printf(buff);
  
          return -1;
  
      }
  
  }