Successful build of binary for taking a interval value.

src/film.cc

@@ -130,8 +130,8 @@ void film::CompareFrame (AVFrame * pFrame, AVFrame * pFramePrev)
   score = 0;
 
   // IDEA! Split image in slices and calculate score per-slice.
-  // This would allow to detect areas on the image which have stayed 
-  // the same, and (a) increase score if all areas have changed 
+  // This would allow to detect areas on the image which have stayed
+  // the same, and (a) increase score if all areas have changed
   // and (b) decrease score if some areas have changed less (ot not at all).
   for (y = 0; y < height; y++) {
     for (x = 0; x < width; x++) {
@@ -311,7 +311,7 @@ int film::process ()
    * Register all formats and codecs
    */
   av_register_all ();
-  pFormatCtx = avformat_alloc_context ();   
+  pFormatCtx = avformat_alloc_context ();
   if (avformat_open_input (&pFormatCtx, input_path.c_str (), NULL, NULL) != 0) {
     string error_msg = "Could not open file ";
     error_msg += input_path;
@@ -354,7 +354,7 @@ int film::process ()
    */
   if (audioStream != -1) {
     if (audio_set) {
-      
+
       string xml_audio = graphpath + "/" + alphaid + "_audio.xml";
       init_xml (xml_audio);
     }
@@ -383,15 +383,18 @@ int film::process ()
       return -1;		// Could not open codec
 
     /*
-     * Allocate current and previous video frames 
+     * Allocate current and previous video frames
      */
     pFrame = avcodec_alloc_frame ();
     // RGB:
     pFrameRGB = avcodec_alloc_frame ();     // current frame
+    for (int j=0;j<this->interval; j++){
+        tempRGBprev = avcodec_alloc_frame();
+    }
     pFrameRGBprev = avcodec_alloc_frame (); // previous frame
     // YUV:
     pFrameYUV = avcodec_alloc_frame ();     // current frame
-    
+
     /*
      * Allocate memory for the pixels of a picture and setup the AVPicture fields for it
      */
@@ -457,7 +460,7 @@ int film::process ()
           }
         }
 
-        /* 
+        /*
          * Calling "sws_scale" is used to copy the data from "pFrame->data" to other
          * frame buffers for later processing. It is also used to convert between
          * different pix_fmts.
@@ -554,7 +557,7 @@ int film::process ()
     av_free (pFrameYUV);
     avcodec_close (pCodecCtx);
   }
-  
+
   // Close the codec
   if (audioStream != -1) {
     /* Close the XML file */

src/film.h

@@ -91,6 +91,7 @@ class film
   // - RGB:
   AVFrame *pFrameRGB;
   AVFrame *pFrameRGBprev;
+  AVFrame *tempRGBprev;
   // - YUV:
   AVFrame *pFrameYUV;
 
@@ -200,6 +201,9 @@ class film
   bool draw_hsv_graph;
   bool draw_yuv_graph;
 
+  /* Interval of frames to skip*/
+  int interval;
+
   xml *x;
   bool display;
 
@@ -251,6 +255,9 @@ class film
   inline void set_year(int year) {
     this->year=year;
   };
+  inline void set_interval(int interval) {
+      this->interval=interval;
+  }
   inline void set_alphaid(string alphaid) {
     this->alphaid = alphaid;
   };

src/main.cc

@@ -57,6 +57,7 @@ void show_help (char **argv) {
           "-m           : generate the thumbnail image\n"
           "-r           : generate the images in native resolution\n"
           "-c           : print timecode on x-axis in graph\n",
+          "-z           : Interval to compare frames across(Default 1)\n",
           g_APP_VERSION,
           argv[0],
           DEFAULT_THRESHOLD
@@ -82,7 +83,7 @@ int main (int argc, char **argv) {
   f.threshold=DEFAULT_THRESHOLD;
 
   for (;;) {
-    int c = getopt (argc, argv, "?hnt:y:i:o:a:x:s:flwvmrc");
+    int c = getopt (argc, argv, "?hnt:y:i:o:a:x:s:flwvmrcz");
 
     if (c < 0) {
       break;
@@ -131,7 +132,7 @@ int main (int argc, char **argv) {
       break;
 
       /* Embed timecode in graph  */
-    case 't':
+    case 'c':
       f.set_show_timecode(true);
       break;
 
@@ -174,6 +175,10 @@ int main (int argc, char **argv) {
       gui = false;
       break;
 
+    /* Compare across this interval */
+    case 'z':
+      f.set_interval(atoi(optarg));
+      break;
 
     default:
       break;