C++ (Cpp) ppr_video_io_open Examples

Example #1

File: pittpatt_io.cpp Project: KeeganRen/janus

janus_error janus_open_video(const char *file_name, janus_video *video)
{
    ppr_video_io_type ppr_video;
    ppr_video_io_error_type error = ppr_video_io_open(&ppr_video, file_name);
    if (error != PPR_VIDEO_IO_SUCCESS) {
        *video = NULL;
        return JANUS_INVALID_VIDEO;
    }
    *video = (janus_video)ppr_video;
    return JANUS_SUCCESS;
}

Example #2

File: sdk_draw_utils.c Project: ranxian/PeopleTracker

/* Overlays bounding boxes and landmarks from tracks onto copies of the frames in the video */
void sdk_draw_utils_overlay_track_list_on_video(
  const char *in_filename,
  ppr_track_list_type track_list,
  int min_confidence,
  int overlay_frame_numbers,
  const char *output_video_format)
{
  int i;
  int frame_num;

  ppr_video_io_type input_video;
  ppr_video_io_type output_video;
  int frame_rate_numerator;
  int frame_rate_denominator;
  int *i_tracked_face_lists;
  ppr_face_attributes_type face_attributes;

  ppr_raw_image_type raw_image;
  char title[FILENAME_MAX];
  char out_filename[FILENAME_MAX];
  
  /* Open video */
  TRY_VIDEO(ppr_video_io_open(&input_video, in_filename));
  TRY_VIDEO(ppr_video_io_get_frame_rate(input_video, &frame_rate_numerator, &frame_rate_denominator));

  /* Create output video */
  sdk_utils_get_file_title(in_filename, title);
  sprintf(out_filename, "%s_track_overlay.%s", title, output_video_format);
  TRY_VIDEO(ppr_video_io_create(&output_video, out_filename, BIT_RATE, frame_rate_numerator, frame_rate_denominator));

  /* Create array of indices into tracked face arrays */
  i_tracked_face_lists = (int*)malloc(track_list.length * sizeof(int));
  sdk_utils_check_allocation(i_tracked_face_lists, "i_tracked_face_lists", __FUNCTION__);
  for (i = 0; i < track_list.length; i++)
    i_tracked_face_lists[i] = 0;

  /* Loop through each frame of video */
  frame_num = 0;
  while (ppr_video_io_is_frame_available(input_video))
  {
    /* Read frame from video */
    TRY_VIDEO(ppr_video_io_get_frame(input_video, &raw_image));

    /* Overlay polygons on frame */
    sdk_draw_utils_advance_indices_to_frame(track_list, i_tracked_face_lists, frame_num);
    for (i = 0; i < track_list.length; i++)
    {
      ppr_get_face_attributes(track_list.tracks[i].tracked_faces.faces[i_tracked_face_lists[i]], &face_attributes);
      if (face_attributes.tracking_info.frame_number == frame_num)
      {
        /* Overlay polygon for this face */
        sdk_draw_utils_overlay_tracked_faces(&raw_image, 1, &track_list.tracks[i].tracked_faces.faces[i_tracked_face_lists[i]], min_confidence);
      }
    }

    /* Overlay frame number on frame */
    if (overlay_frame_numbers)
      sdk_draw_utils_overlay_frame_number(&raw_image, frame_num);

    /* Write frame to output video */
    TRY_VIDEO(ppr_video_io_add_frame(output_video, raw_image));

    /* Free frame */
    ppr_raw_image_free(raw_image);

    /* Advance to next frame */
    TRY_VIDEO(ppr_video_io_step_forward(input_video));
    frame_num++;
  }

  /* Close video */
  TRY_VIDEO(ppr_video_io_close(input_video));
  TRY_VIDEO(ppr_video_io_close(output_video));

  /* Clean up */
  free(i_tracked_face_lists);
}