V2.0.10

1.修改一对多布局时，老师视频由多段不同分辨率视频组成时，会出现程序异常的问题
2.一对多布局时，支持对不同分辨率的老师视频进行缩放，统一到相同分辨率

@@ -57,7 +57,7 @@ int CAVDecoder::add(media_info &info)
 		_end_time_ms = info.end_time_ms;
 	}
 	
-	av_log(NULL, AV_LOG_INFO, "CAVDecoder add info:%lf, %"PRIu64", %"PRIu64", %.3f\n", _cur_a_ts_ms, _cur_v_ts_ms, _end_time_ms, info.duration);
+	av_log(NULL, AV_LOG_INFO, "CAVDecoder add info:%lf, %lf, %"PRIu64", %.3f\n", _cur_a_ts_ms, _cur_v_ts_ms, _end_time_ms, info.duration);
 
 	return 0;
 }

@@ -104,7 +104,10 @@ _one2one_same_size(one2one_same_size)
 		_pip_width = _scaled_height - pip_x_reduce;  //use the scaled height,not the scaled width as pip_width
 		_pip_height = _scaled_height - pip_y_reduce;
 		
-		_nOutputHeight = _teacher_height + extent_student_lines * (_pip_height + pip_y_gap) - (part_student == 0 ? (pip_y_gap) : 0);
+		_nOutputHeight = _teacher_height + extent_student_lines * (_pip_height + pip_y_gap);
+		if (extent_student_lines > 0) {
+			_nOutputHeight = _nOutputHeight  - (part_student == 0 ? (pip_y_gap) : 0);
+		}
 		_nOutputHeight = ((_nOutputHeight + 1) / 2) * 2;
 
 		int student_line_width = 4 * (_pip_width)+3 * pip_x_gap + 2 * pip_x_border;
@@ -466,17 +469,29 @@ int CAVTranscoder::open_output_file(const char *filename)
 			CAVDecoder * pDecoder = decoders_got_frame[idxTeacher];
 			AVFrame * pFrame = pDecoder->_cur_v_frame;
 			if (pFrame) {
-				av_frame_free(&_teacherFrame);
+				if (_teacherFrame != _scaled_frame_teacher) {
+					av_frame_free(&_teacherFrame);
+				}
 				_teacherFrame = pFrame;
 				pDecoder->_cur_v_frame = NULL;
 			}
 		}
 		if (_teacherFrame) {
-			fillDestFrame(pDstFrame, _teacherFrame, 0, 0);
+			if (_one2one_same_size) {
+				fill_one2many_scaled_teacher_frame(pDstFrame);
+			}
+			else {
+				if (_nOutputWidth > _teacherFrame->width) {
+					memset(pDstFrame->data[0], _blank_y, pDstFrame->linesize[0] * (_teacherFrame->height));
+					memset(pDstFrame->data[1], _blank_u, pDstFrame->linesize[1] * (_teacherFrame->height) / 2);
+					memset(pDstFrame->data[2], _blank_v, pDstFrame->linesize[2] * (_teacherFrame->height) / 2);
+				}
+				fillDestFrame(pDstFrame, _teacherFrame, 0, 0);
+			}
 			if (_nOutputHeight > _teacherFrame->height) {
-				memset(pDstFrame->data[0] + _teacher_height * pDstFrame->linesize[0], _blank_y, pDstFrame->linesize[0] * (_nOutputHeight - _teacherFrame->height));
-				memset(pDstFrame->data[1] + _teacher_height / 2 * pDstFrame->linesize[1], _blank_u, pDstFrame->linesize[1] * (_nOutputHeight - _teacherFrame->height) / 2);
-				memset(pDstFrame->data[2] + _teacher_height / 2 * pDstFrame->linesize[2], _blank_v, pDstFrame->linesize[2] * (_nOutputHeight - _teacherFrame->height) / 2);
+				memset(pDstFrame->data[0] + _teacherFrame->height * pDstFrame->linesize[0], _blank_y, pDstFrame->linesize[0] * (_nOutputHeight - _teacherFrame->height));
+				memset(pDstFrame->data[1] + _teacherFrame->height / 2 * pDstFrame->linesize[1], _blank_u, pDstFrame->linesize[1] * (_nOutputHeight - _teacherFrame->height) / 2);
+				memset(pDstFrame->data[2] + _teacherFrame->height / 2 * pDstFrame->linesize[2], _blank_v, pDstFrame->linesize[2] * (_nOutputHeight - _teacherFrame->height) / 2);
 			}
 		}
 		else
@@ -901,6 +916,42 @@ int CAVTranscoder::open_output_file(const char *filename)
 		}
 	}
 
+	int CAVTranscoder::fill_one2many_scaled_teacher_frame(AVFrame * pDstFrame)
+	{
+		if (_teacherFrame->width != _teacher_width || _teacherFrame->height != _teacher_height) {
+			if (_scaled_frame_teacher != _teacherFrame) {
+				if (_src_width_teacher != _teacherFrame->width || _src_height_teacher != _teacherFrame->height) {//init scale context
+
+					free_scale_context(&_sws_ctx_teacher, &_scaled_frame_teacher);
+
+					int scaled_width, scaled_height;
+					get_scaled_dest_size(_teacherFrame, _teacher_width, _teacher_height, &scaled_width, &scaled_height);
+					init_scale_context(&_sws_ctx_teacher, &_scaled_frame_teacher, _teacherFrame->width, _teacherFrame->height, scaled_width, scaled_height);
+
+					_src_width_teacher = _teacherFrame->width;
+					_src_height_teacher = _teacherFrame->height;
+				}
+
+				int h = 0;
+				h = sws_scale(_sws_ctx_teacher, _teacherFrame->data, _teacherFrame->linesize, 0, _teacherFrame->height,
+					_scaled_frame_teacher->data, _scaled_frame_teacher->linesize);
+				_scaled_frame_teacher->pkt_dts = _teacherFrame->pkt_dts;//pass rotation
+
+				av_frame_free(&_teacherFrame);
+				_teacherFrame = _scaled_frame_teacher;
+			}
+		}
+
+		if (_nOutputWidth > _teacherFrame->width) {
+			memset(pDstFrame->data[0], _blank_y, pDstFrame->linesize[0] * (_teacherFrame->height));
+			memset(pDstFrame->data[1], _blank_u, pDstFrame->linesize[1] * (_teacherFrame->height) / 2);
+			memset(pDstFrame->data[2], _blank_v, pDstFrame->linesize[2] * (_teacherFrame->height) / 2);
+		}
+		fillDestFrame(pDstFrame, _teacherFrame, 0, 0);
+
+		return 0;
+	}
+
 	int CAVTranscoder::mix_and_output_one2one_vframe(vector<CAVDecoder *> & decoders_got_frame)
 	{
 		//prepare one2one base frame

@@ -81,5 +81,6 @@ private:
 	int scale_fill_one2one_studentframe(AVFrame * pDstFrame, int y);
 	int fill_one2one_student_frame(AVFrame * pDstFrame, int y);
 	void get_scaled_dest_size(AVFrame * pFrame, int dest_width, int dest_height, int* scaled_width, int* scaled_height);
+	int fill_one2many_scaled_teacher_frame(AVFrame * pDstFrame);
 };
 

@@ -46,8 +46,8 @@ merge_pip_codec.cfg主要编码参数：
 #音频码率
  a_bit_rate = 64000
 
--s 为可选参数，在一对一布局下起作用。缺省为1
-1 如果老师和学生的视频大小不一致，会放大较小的视频使得老师和学生视频大小相同。
+-s 为可选参数。缺省为1
+1 在一对一时， 如果老师和学生的视频大小不一致，会放大较小的视频使得老师和学生视频大小相同。在一对多时，如果老师视频由多段不同分辨率视频组成，会对老师视频进行缩放统一
 0 保持原有视频大小
 
 合屏后生成完成信息文件，文件名为"m_" + 输入文件名" + ".txt"，合成的mp4文件名为"m_" + 输入文件名" + ".mp4"
@@ -90,4 +90,8 @@ V2.0.8
 2.修改在一对一布局下，不需要缩放时，学生视频如果宽度小于输出视频宽度，输出视频有部分背景花屏
 
 V2.0.9
-1.忽略录像信息文件里在视频文件关闭后设置视频旋转角度的情况，避免视频旋转角度错误
\ No newline at end of file
+1.忽略录像信息文件里在视频文件关闭后设置视频旋转角度的情况，避免视频旋转角度错误
+
+V2.0.10
+1.修改一对多布局时，老师视频由多段不同分辨率视频组成时，会出现程序异常的问题
+2.一对多布局时，支持对不同分辨率的老师视频进行缩放，统一到相同分辨率
\ No newline at end of file

@@ -1216,7 +1216,7 @@ int process_av_files(char * record_info, int piptype, bool one2one_same_size, in
 int main(int argc, char * argv[])
 {
 	if (argc < 2) {
-		printf("   merge_pip 2.0.9\n");
+		printf("   merge_pip 2.0.10\n");
 		printf("   merge video files to one pip video according to record info file,\nusage:");
 		printf("\n   %s record_info_filename [-t {0,1,2}]  [-c codec.cfg] [-s {1,0}]", argv[0]);
 		printf("\n\n");