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• AMV video encoder ?

  15 novembre 2011, par Shimmy

  I'm looking for a converter that can encode input files to amv format output.

  I've found this project, but it looks somewhat outdated and not maintained.
  Do you know of a solid and reliable amv encoder (any API or tool that can be invoked from .NET), or can you recommend on the one I mentioned ?

• Render video frame via openGLES2 with Android NDK

  27 février 2014, par wolfz

  I made a bin code with NDK to get video frames by ffmpeg decoding, and rendered to opengles, but the screen had nothing changed, it still displayed the launcher.

  *But when i made a apk tolaunch，it always show black。*

  my opengles2.0 ini code is below：

  static int window_init_display(void)
  
  {
  
      EGLint attribs [] = {
  
        EGL_RED_SIZE,        8,
  
        EGL_GREEN_SIZE,      8,
  
        EGL_BLUE_SIZE,       8,
  
        EGL_ALPHA_SIZE,      8,
  
        EGL_DEPTH_SIZE,     16,
  
        EGL_STENCIL_SIZE,    0,
  
        EGL_SAMPLE_BUFFERS,  0,
  
        EGL_SAMPLES,         0,
  
        EGL_SURFACE_TYPE,    EGL_WINDOW_BIT,
  
        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
  
        EGL_NONE
  
      };
  
  
  
      EGLint w, h, format;
  
      EGLint numConfigs;
  
      EGLConfig config;
  
      EGLSurface surface;
  
      EGLContext context;
  
  
  
      EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
  
  
  
      eglInitialize(display, 0, 0);
  
  
  
      eglChooseConfig(display, attribs, &config, 1, &numConfigs);
  
  
  
      eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID, &format);
  
  
  
      ANativeWindow_setBuffersGeometry(g_application->window, 0, 0, format);
  
  
  
      surface = eglCreateWindowSurface(display, config, g_application->window, NULL);
  
  
  
      eglQuerySurface(display, surface, EGL_WIDTH, &w);    
  
      eglQuerySurface(display, surface, EGL_HEIGHT, &h);
  
      LOGI("EGL_WIDTH=%d, EGL_HEIGHT=%d",w,h);
  
  
  
      eglBindAPI(EGL_OPENGL_ES_API);
  
  
  
      EGLint contextAttrs[] =
  
      {
  
         EGL_CONTEXT_CLIENT_VERSION, 2,
  
         EGL_NONE
  
      };
  
      context = eglCreateContext(display, config, NULL, contextAttrs);
  
  
  
      if (eglMakeCurrent(display, surface, surface, context) == EGL_FALSE) 
  
      {         
  
              LOGW("Unable to eglMakeCurrent");      
  
              return -1;   
  
  }
  
  
  
      LOGI("OK init EGL !!!!");

  }

  My render code is below :

  int m_rgbBufferSize = pPicture->iDisplayWidth*pPicture->iDisplayHeight*4;
  
  m_rgbBuffer = new unsigned char[m_rgbBufferSize];
  
  
  
  struct SwsContext *m_sw_context=NULL;
  
  m_sw_context = m_dllSwScale.sws_getCachedContext(m_sw_context,
  
                                                    pPicture->iWidth, pPicture->iHeight, PIX_FMT_YUV420P,
  
                                                    pPicture->iWidth, pPicture->iHeight, PIX_FMT_RGBA,
  
                                                    SWS_FAST_BILINEAR, NULL, NULL, NULL);
  
  
  
  uint8_t *psrc[] = { pPicture->data[0], pPicture->data[1], pPicture->data[2], 0 };
  
  int srcStride[] = { pPicture->iLineSize[0], pPicture->iLineSize[1], pPicture->iLineSize[2], 0 };
  
  uint8_t *dst[]  = { m_rgbBuffer, 0, 0, 0 };
  
  int dstStride[] = { pPicture->iDisplayWidth*4, 0, 0, 0 };
  
  m_dllSwScale.sws_scale(m_sw_context, psrc, srcStride, 0, pPicture->iDisplayHeight, dst, dstStride);
  
  //LOGV("swscale OK");
  
  glEnable(GL_TEXTURE_2D);
  
  glPixelStorei(GL_UNPACK_ALIGNMENT,1);
  
  if(textureid == 0)
  
      glGenTextures(1, &textureid);
  
  glActiveTexture(GL_TEXTURE2);
  
  glBindTexture(GL_TEXTURE_2D, textureid);
  
  glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 
  
                  pPicture->iDisplayWidth, pPicture->iDisplayHeight, GL_RGBA, GL_UNSIGNED_BYTE, m_rgbBuffer);

  Why does nothing display ? Should I use abk not bin file to run ?

• Capture 2 screens with ffmpeg

  29 septembre 2016, par wetjosh

  I want to capture simultaneous screen recordings of my main display and the connected display and either save them as two different files or a single file with the video side by side.

  Can either of these be accomplished ? It seems like the latter can but I haven’t had success with it. I’ve tried to follow this but all I’ve ended up creating with it is a double wide movie (good) with the main display recording twice (bad) and not properly scaled.

  Here is my working command that captures just one display :

  ffmpeg -capture_cursor 1 -capture_mouse_clicks 1 \
  
  -f avfoundation -pix_fmt uyvy422 -i 1 -pix_fmt yuv420p -r 30 \
  
  -s 1440x900 -preset ultrafast -b:v 5000k -t 60 out.mov

  And here is my non-working attempt at capturing both and saving them in one movie :

  ffmpeg -capture_cursor 1 -capture_mouse_clicks 1 \
  
  -f avfoundation -pix_fmt uyvy422 -s 1440x900 -i 0 \
  
  -f avfoundation -pix_fmt uyvy422 -s 1440x900 -i 1 \
  
  -pix_fmt yuv420p -r 30 -preset ultrafast -b:v 5000k -t 5 \
  
  -filter_complex "nullsrc=size=2880x900 [base]; \
  
  [base][0:v] overlay [tmp]; [tmp][1:v] overlay=x=1440" \
  
  out.mov

  I did not see anything on the web about saving them as two different files. Is it possible to specify two output files ?