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• FFmpeg can not open video file after adding the GLsurfaceView to render frames

  4 avril 2016, par Kyle Lo

  The source code works perfectly without any modification.

  I successfully use the below function to play the specified video.

  playview.openVideoFile("/sdcard/Test/mv.mp4");

  And for the research purpose I need to display the frame by using OpenGL ES. So I remove the original method below.

  ANativeWindow* window = ANativeWindow_fromSurface(env, javaSurface);
  
  
  
  ANativeWindow_Buffer buffer;
  
  if (ANativeWindow_lock(window, &buffer, NULL) == 0) {
  
    memcpy(buffer.bits, pixels,  w * h * 2);
  
    ANativeWindow_unlockAndPost(window);
  
  }
  
  
  
  ANativeWindow_release(window);

  And I add FrameRenderer class into my project

  public class FrameRenderer implements GLSurfaceView.Renderer {
  
  
  
      public long time = 0;
  
      public short framerate = 0;
  
      public long fpsTime = 0;
  
      public long frameTime = 0;
  
      public float avgFPS = 0;
  
      private PlayNative mNative = null;
  
  
  
      @Override
  
      public void onSurfaceCreated(GL10 gl, EGLConfig config) {/*do nothing*/}
  
  
  
      @Override
  
      public void onSurfaceChanged(GL10 gl, int width, int height) {
  
  
  
      }
  
  
  
      @Override
  
      public void onDrawFrame(GL10 gl) {
  
          mNative.render();
  
      }

  In the native side I create a corresponding method in VideoPlay.cpp And I only use glClearColorto test if the OpenGL function works or not.

  void VideoPlay::render() {
  
      glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
  
      glClear(GL_COLOR_BUFFER_BIT);
  
  }

  And the onCreate is as below.

  protected void onCreate(Bundle savedInstanceState) {
  
          // TODO Auto-generated method stub
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.main_layout);
  
  
  
          playview = new PlayView(this);
  
  
  
          playview.openVideoFile("/sdcard/test_tt_racing.mp4");
  
          //playview.openVideoFile("/sdcard/big_buck_bunny.mp4");
  
  
  
          GLSurfaceView surface = (GLSurfaceView)findViewById(R.id.surfaceviewclass);
  
          surface.setRenderer(new FrameRenderer());
  
          ...

  Then test it on the mobile, the screen becomes red which means the GLSurfaceView and OpenGL works fine.

  But after I press the play bottom, whole the app stucked. And Show in the
  Log

  My question is why I can open the video whose path is totally the same with the previous one, just after I added the GLsurface renderer and how can I fix it ?

• applehttpproto : Use the close function if the open function fails

  1er décembre 2011, par Martin Storsjö

  applehttpproto : Use the close function if the open function fails

• How can I make ffmpeg open my raw video file ?

  5 février 2017, par Mandy Weiss

  I’m trying to convert a raw video-only file to some other formats but all I’m getting ffmpeg to produce is a black video.
  There are no error messages displayed and this is what ffprobe shows when analyzing the file :

  ffprobe version 3.2.2 Copyright (c) 2007-2016 the FFmpeg developers
  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
  configuration : —prefix=/usr/local/Cellar/ffmpeg/3.2.2 —enable-shared
  —enable-pthreads —enable-gpl —enable-version3 —enable-hardcoded-tables —enable-avresample —cc=clang —host-cflags= —host-ldflags= —enable-libmp3lame —enable-libx264 —enable-libxvid —enable-opencl —disable-lzma —enable-vda libavutil 55. 34.100 / 55. 34.100 libavcodec 57. 64.101 /
  57. 64.101 libavformat 57. 56.100 / 57. 56.100 libavdevice 57. 1.100 / 57. 1.100 libavfilter 6. 65.100 / 6. 65.100 libavresample 3. 1. 0 / 3. 1. 0 libswscale 4. 2.100 /
  4. 2.100 libswresample 2. 3.100 / 2. 3.100 libpostproc 54. 1.100 / 54. 1.100 Input #0, avi, from ’1.avi’ : Metadata :
  encoder : Lavf54.20.4 Duration : 00:00:57.43, start : 0.000000, bitrate : 83196 kb/s
  Stream #0:0 : Video : rawvideo, pal8, 720x480, 83238 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc

  Other input files can be transcoded to a playable outfile file with the same ffmpeg convert command :

  ffmpeg -i 1.avi -vcodec h264 output.avi

  I know the input video is not corrupted because VLC plays it successfully and can even convert it to other formats, but I want to preserve the original one when trying different configurations using ffmpeg.

  Thanks in advance for helping !