use width and height of image from record file instead of fixed 320x240

but at present,only support landscape layout

@@ -13,17 +13,13 @@ uint8_t blank_r = 0x16;
 uint8_t blank_g = 0x5a;
 uint8_t blank_b = 0x82;
 
-CAVTranscoder::CAVTranscoder(bool bOne2One):
+CAVTranscoder::CAVTranscoder(bool bOne2One,int width,int height):
 _start_time(INT64_MAX),
 _all_processed(true),
 _nOutputWidth(320),
 _cur_out_v_ts(0),
 _cur_out_a_ts(0),
 _max_audio(1),
-_scaled_width(100),
-_scaled_height(75),
-_src_width(320),
-_src_height(240),
 _sws_ctx_w_h(NULL),
 _sws_ctx_h_w(NULL),
 _sws_ctx_h_h(NULL),
@@ -34,6 +30,10 @@ _last_videos_got(-1),
 _teacherFrame(NULL),
 _studentFrame(NULL)
 {
+	_src_width = width;
+	_src_height = height;
+	_scaled_width = _src_width  * 10 / 32;
+	_scaled_height = _src_height * 10 / 32;
 	_one2one = bOne2One;
 	if (_one2one) {
 		_nOutputHeight = _src_height * 2;

@@ -5,7 +5,7 @@
 class CAVTranscoder
 {
 public:
-	CAVTranscoder(bool bOne2One);
+	CAVTranscoder(bool bOne2One, int width, int height);
 	virtual ~CAVTranscoder();
 
 	int add(media_info & info);

@@ -627,6 +627,8 @@ int count_audio_files(float mid)
 }
 
 int max_audio = 1;
+int width = 0;
+int height = 0;
 
 void add_media_infos()
 {
@@ -684,6 +686,22 @@ void add_media_infos()
 	it = sorted_media_with_end.begin();
 	for (; it != sorted_media_with_end.end();it++){
 		printf("\n%2d %8.3f %s %4d %4d %3d %s", it->sorted_index, it->type_time, it->name.c_str(), it->width, it->height, it->rotate, it->t_type == tt_start ? "start" : "end");
+		if (it->width > it->height) {
+			if (width < it->width) {
+				width = it->width;
+			}
+			if (height < it->height) {
+				height = it->height;
+			}
+		}
+		else {//set the image to landscape
+			if (width < it->height) {
+				width = it->height;
+			}
+			if (height < it->width) {
+				height = it->width;
+			}
+		}
 	}
 	printf("\n-------------------------\n");
 
@@ -1050,7 +1068,7 @@ int process_av_files(char * record_info, int piptype)
 		}
 	}
 
-	CAVTranscoder videoTranscoder(one2one);
+	CAVTranscoder videoTranscoder(one2one, width, height);
 	videoTranscoder.set_max_audio(max_audio);
 
 	int64_t cur_time = 0;