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• Revision 43866 : rendre la boucle (DATA){recherche} utilisable avec des options par defaut

  25 janvier 2011, par fil@… — Log

  rendre la boucle (DATA)recherche utilisable avec des options par defaut

• How to get picture buffer data in ffmpeg ?

  5 juin 2014, par 4ntoine

  I’m trying to pass bitmap from ffmpeg to android.
  It already works but it’s displaying picture right on surface passed from java to native code.
  How can i get frame buffer bitmap data to pass it to java ?

  I’ve tried to save out_frame buffer data :

  unsigned char bmpFileHeader[14] = {'B', 'M', 0,0,0,0, 0,0, 0,0, 54, 0,0,0};
  
  unsigned char bmpInfoHeader[40] = {40,0,0,0, 0,0,0,0, 0,0,0,0, 1,0, 24,0};
  
  unsigned char bmpPad[3] = {0, 0, 0};
  
  
  
  void saveBuffer(int fileIndex, int width, int height, unsigned char *buffer, int buffer_size) {
  
  
  
      unsigned char filename[1024];
  
      sprintf(filename, "/storage/sdcard0/3d_player_%d.bmp", fileIndex);
  
  
  
      LOGI(10, "saving ffmpeg bitmap file: %d to %s", fileIndex, filename);
  
  
  
      FILE *bitmapFile = fopen(filename, "wb");
  
      if (!bitmapFile) {
  
          LOGE(10, "failed to create ffmpeg bitmap file");
  
          return;
  
      }
  
  
  
      unsigned char filesize = 54 + 3 * width * height; // 3 = (r,g,b)
  
  
  
      bmpFileHeader[2] = (unsigned char)(filesize);
  
      bmpFileHeader[3] = (unsigned char)(filesize >> 8);
  
      bmpFileHeader[4] = (unsigned char)(filesize >> 16);
  
      bmpFileHeader[5] = (unsigned char)(filesize >> 24);
  
  
  
      bmpInfoHeader[4] = (unsigned char)(width);
  
      bmpInfoHeader[5] = (unsigned char)(width >> 8);
  
      bmpInfoHeader[6] = (unsigned char)(width >> 16);
  
      bmpInfoHeader[7] = (unsigned char)(width >> 24);
  
      bmpInfoHeader[8] = (unsigned char)(height);
  
      bmpInfoHeader[9] = (unsigned char)(height >> 8);
  
      bmpInfoHeader[10] = (unsigned char)(height >> 16);
  
      bmpInfoHeader[11] = (unsigned char)(height >> 24);
  
  
  
      fwrite(bmpFileHeader, 1, 14, bitmapFile);
  
      fwrite(bmpInfoHeader, 1, 40, bitmapFile);
  
      int i;
  
      for (i=0; iplayer;
  
      int stream_no = decoder_data->stream_no;
  
      AVCodecContext * ctx = player->input_codec_ctxs[stream_no];
  
      AVFrame * frame = player->input_frames[stream_no];
  
      AVStream * stream = player->input_streams[stream_no];
  
      int interrupt_ret;
  
      int to_write;
  
      int err = 0;
  
      AVFrame *rgb_frame = player->rgb_frame;
  
      ANativeWindow_Buffer buffer;
  
      ANativeWindow * window;
  
  
  
  #ifdef MEASURE_TIME
  
      struct timespec timespec1, timespec2, diff;
  
  #endif // MEASURE_TIME
  
      LOGI(10, "player_decode_video decoding");
  
      int frameFinished;
  
  
  
  #ifdef MEASURE_TIME
  
      clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &timespec1);
  
  #endif // MEASURE_TIME
  
      int ret = avcodec_decode_video2(ctx, frame, &frameFinished,
  
              packet_data->packet);
  
  
  
  #ifdef MEASURE_TIME
  
      clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &timespec2);
  
      diff = timespec_diff(timespec1, timespec2);
  
      LOGI(3, "decode_video timediff: %d.%9ld", diff.tv_sec, diff.tv_nsec);
  
  #endif // MEASURE_TIME
  
  
  
      if (ret < 0) {
  
          LOGE(1, "player_decode_video Fail decoding video %d\n", ret);
  
          return -ERROR_WHILE_DECODING_VIDEO;
  
      }
  
      if (!frameFinished) {
  
          LOGI(10, "player_decode_video Video frame not finished\n");
  
          return 0;
  
      }
  
  
  
      // saving in buffer converted video frame
  
      LOGI(7, "player_decode_video copy wait");
  
  
  
  #ifdef MEASURE_TIME
  
      clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &timespec1);
  
  #endif // MEASURE_TIME
  
  
  
      pthread_mutex_lock(&player->mutex_queue);
  
      window = player->window;
  
      if (window == NULL) {
  
          pthread_mutex_unlock(&player->mutex_queue);
  
          goto skip_frame;
  
      }
  
      ANativeWindow_setBuffersGeometry(window, ctx->width, ctx->height,
  
              WINDOW_FORMAT_RGBA_8888);
  
      if (ANativeWindow_lock(window, &buffer, NULL) != 0) {
  
          pthread_mutex_unlock(&player->mutex_queue);
  
          goto skip_frame;
  
      }
  
      pthread_mutex_unlock(&player->mutex_queue);
  
  
  
      int format = buffer.format;
  
      if (format < 0) {
  
          LOGE(1, "Could not get window format")
  
      }
  
      enum PixelFormat out_format;
  
      if (format == WINDOW_FORMAT_RGBA_8888) {
  
          out_format = PIX_FMT_RGBA;
  
          LOGI(6, "Format: WINDOW_FORMAT_RGBA_8888");
  
      } else if (format == WINDOW_FORMAT_RGBX_8888) {
  
          out_format = PIX_FMT_RGB0;
  
          LOGE(1, "Format: WINDOW_FORMAT_RGBX_8888 (not supported)");
  
      } else if (format == WINDOW_FORMAT_RGB_565) {
  
          out_format = PIX_FMT_RGB565;
  
          LOGE(1, "Format: WINDOW_FORMAT_RGB_565 (not supported)");
  
      } else {
  
          LOGE(1, "Unknown window format");
  
      }
  
  
  
      avpicture_fill((AVPicture *) rgb_frame, buffer.bits, out_format,
  
              buffer.width, buffer.height);
  
      rgb_frame->data[0] = buffer.bits;
  
      if (format == WINDOW_FORMAT_RGBA_8888) {
  
          rgb_frame->linesize[0] = buffer.stride * 4;
  
      } else {
  
          LOGE(1, "Unknown window format");
  
      }
  
      LOGI(6,
  
              "Buffer: width: %d, height: %d, stride: %d",
  
              buffer.width, buffer.height, buffer.stride);
  
      int i = 0;
  
  
  
  #ifdef MEASURE_TIME
  
      clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &timespec2);
  
      diff = timespec_diff(timespec1, timespec2);
  
      LOGI(1,
  
              "lockPixels and fillimage timediff: %d.%9ld", diff.tv_sec, diff.tv_nsec);
  
  #endif // MEASURE_TIME
  
  #ifdef MEASURE_TIME
  
      clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &timespec1);
  
  #endif // MEASURE_TIME
  
      LOGI(7, "player_decode_video copying...");
  
      AVFrame * out_frame;
  
      int rescale;
  
      if (ctx->width == buffer.width && ctx->height == buffer.height) {
  
          // This always should be true
  
          out_frame = rgb_frame;
  
          rescale = FALSE;
  
      } else {
  
          out_frame = player->tmp_frame2;
  
          rescale = TRUE;
  
      }
  
  
  
      if (ctx->pix_fmt == PIX_FMT_YUV420P) {
  
          __I420ToARGB(frame->data[0], frame->linesize[0], frame->data[2],
  
                  frame->linesize[2], frame->data[1], frame->linesize[1],
  
                  out_frame->data[0], out_frame->linesize[0], ctx->width,
  
                  ctx->height);
  
      } else if (ctx->pix_fmt == PIX_FMT_NV12) {
  
          __NV21ToARGB(frame->data[0], frame->linesize[0], frame->data[1],
  
                  frame->linesize[1], out_frame->data[0], out_frame->linesize[0],
  
                  ctx->width, ctx->height);
  
      } else {
  
          LOGI(3, "Using slow conversion: %d ", ctx->pix_fmt);
  
          struct SwsContext *sws_context = player->sws_context;
  
          sws_context = sws_getCachedContext(sws_context, ctx->width, ctx->height,
  
                  ctx->pix_fmt, ctx->width, ctx->height, out_format,
  
                  SWS_FAST_BILINEAR, NULL, NULL, NULL);
  
          player->sws_context = sws_context;
  
          if (sws_context == NULL) {
  
              LOGE(1, "could not initialize conversion context from: %d"
  
              ", to :%d\n", ctx->pix_fmt, out_format);
  
              // TODO some error
  
          }
  
          sws_scale(sws_context, (const uint8_t * const *) frame->data,
  
                  frame->linesize, 0, ctx->height, out_frame->data,
  
                  out_frame->linesize);
  
      }
  
  
  
      if (rescale) {
  
          // Never occurs
  
          __ARGBScale(out_frame->data[0], out_frame->linesize[0], ctx->width,
  
                  ctx->height, rgb_frame->data[0], rgb_frame->linesize[0],
  
                  buffer.width, buffer.height, __kFilterNone);
  
          out_frame = rgb_frame;
  
      }
  
  
  
      // TODO: (4ntoine) frame decoded and rescaled, ready to call callback with frame picture from buffer
  
      int bufferSize = buffer.width * buffer.height * 3; // 3 = (r,g,b);  
  
  
  
      static int bitmapCounter = 0;
  
      if (bitmapCounter < 10) {
  
          saveBuffer(bitmapCounter++, buffer.width, buffer.height, (unsigned char *)out_frame->data, bufferSize);
  
      }

  but out_frame is empty and file has header and 0x00 bytes body.

  How to get picture buffer data in ffmpeg ?

• Android screenshot raw data conversion

  30 juin 2014, par user3607576

  I’m trying to take screenshots of an Android rooted device. I managed to access the framebuffer and get the raw data. Now I have to use the ffmpeg command to convert it to a png format, like so : ffmpeg -vcodec rawvideo -f rawvideo -pix_fmt rgb32 -s 240x320 -i fb0 -f image2 -vcodec png image%d.png
  My question is, where is the output png image ? Where is it saved ?