opencv avi视频文件简单拼接

BOOL CMontageImpl:: StartMontageFile(const char* filepath1, const char* filepath2) 
{


IplImage *newFrame=NULL;  
IplImage *frame1=NULL;  
IplImage *frame2=NULL;  
CvCapture * pCapture1 = cvCreateFileCapture(filepath1);  
CvCapture * pCapture2 = cvCreateFileCapture(filepath2);  
CvRect rect;  
CvVideoWriter *pWriter=NULL;  
//get the frame number of two videos  
int frameNo1 = (int) cvGetCaptureProperty(pCapture1, CV_CAP_PROP_FRAME_COUNT);  
int frameNo2 = (int) cvGetCaptureProperty(pCapture2, CV_CAP_PROP_FRAME_COUNT);  
if(frameNo1!=frameNo2)  
printf("video length 1 != video length 2\n");  
else  
printf("Total frame numbers: %d\n",frameNo1);  
//get the frame width of two videos  
int frameWidth1 = (int) cvGetCaptureProperty(pCapture1, CV_CAP_PROP_FRAME_WIDTH);  
int frameWidth2 = (int) cvGetCaptureProperty(pCapture2, CV_CAP_PROP_FRAME_WIDTH);  
if(frameWidth1!=frameWidth2)  
printf("video width 1 != video width 2\n");  
else  
printf("frame width: %d\n",frameWidth1);  
//get the frame height of two videos  
int frameHeight1 = (int) cvGetCaptureProperty(pCapture1, CV_CAP_PROP_FRAME_HEIGHT );  
int frameHeight2 = (int) cvGetCaptureProperty(pCapture2, CV_CAP_PROP_FRAME_HEIGHT );  
if(frameHeight1!=frameHeight2)  
printf("video height 1 != video height 2\n");  
else  
printf("frame height: %d\n",frameHeight1);  
//get the video fps  
int fps1 = (int) cvGetCaptureProperty(pCapture1, CV_CAP_PROP_FPS  );  
int fps2 = (int) cvGetCaptureProperty(pCapture2, CV_CAP_PROP_FPS  );  
if(fps1!=fps2)  
printf("video fps 1 != video fps 2\n");  
else  
printf("frame fps: %d\n",fps1);  


int initFlag=0;  
int counter=0;  


char tempfilename[MAX_PATH]={0};
Genratefilename(tempfilename);


StartMonitorPopDecodeThread();
while((frame1=cvQueryFrame(pCapture1))!=NULL && (frame2=cvQueryFrame(pCapture2))!=NULL )  
{  
printf("%d\n",counter++);  
if(initFlag==0)  
{  


int outCompressCodec = (int)cvGetCaptureProperty(pCapture1, CV_CAP_PROP_FOURCC); 
char *fourcc = (char *) (&outCompressCodec);
printf("fourcc = <%c%c%c%c>\n" , fourcc[3], fourcc[2], fourcc[1], fourcc[0]);
newFrame = cvCreateImage(cvSize(frame1->width*2,frame1->height),frame1->depth,frame1->nChannels);  
pWriter = cvCreateVideoWriter(tempfilename, -1,fps1,cvSize(frame1->width*2,frame1->height));  
initFlag=1;  
}  
rect.x=0;  
rect.y=0;  
rect.height=frameHeight1;  
rect.width=frameWidth1;  
//use ROI to implement the video split joint  
cvSetImageROI(newFrame, rect);  
cvCopyImage(frame1, newFrame);  
cvResetImageROI(newFrame);  
rect.x = frameWidth1;  
rect.y=0;  
rect.height = frameHeight1;  
rect.width = frameWidth1;  
cvSetImageROI(newFrame, rect);  
cvCopyImage(frame2, newFrame);  
cvResetImageROI(newFrame);  
cvWriteFrame(pWriter, newFrame);  
}  
/*cvReleaseImage(&frame1);  
cvReleaseImage(&frame2);  */
cvReleaseImage(&newFrame);  
cvReleaseVideoWriter(&pWriter);
frame1 = NULL;
frame2 = NULL;
return FALSE;
}