[mjpeg @ 0x27ee9e0] buffer smaller than minimum size

来源：互联网发布：linux shell 数值比较编辑：程序博客网时间：2024/06/05 19:13

在利用opencv读取视频，去除视频画面上的水印、台标和logo，并重新在生成新的视频。VideoWriter 类出现报错 “[mjpeg @ 0x27ee9e0] buffer smaller than minimum size”，查了很久都没有找到原因。

代码如下：

<span style="font-size:14px;">#include "stdio.h"#include "stdlib.h"#include "time.h"#include <opencv2/core/core.hpp>#include <opencv2/highgui/highgui.hpp>#include <opencv2/imgproc/imgproc.hpp>#include "opencv2/photo/photo.hpp"#include <iostream>using namespace std;using namespace cv;int  main(){clock_t start, finish;start = clock();cout << "start!!" << endl;string video_path = "/home/dyx/Desktop/test_logs/";VideoCapture capture(video_path + "test.mp4");if (!capture.isOpened())cout << "fail to open!" << endl;//获取帧率double fps =capture.get( CV_CAP_PROP_FPS);cout << "帧率为:" << fps << endl;Size videoSize(capture.get( CV_CAP_PROP_FRAME_WIDTH),capture.get( CV_CAP_PROP_FRAME_HEIGHT));int tem=CV_FOURCC('F', 'L', 'V', '1');cout<<tem<<endl;VideoWriter writer(video_path + "VideoTest.avi", CV_FOURCC('D', 'I', 'V', 'X') , fps, videoSize);//VideoWriter writer(video_path + "VideoTest.avi", CV_FOURCC('F', 'L', 'V', '1'), fps, videoSize);//VideoWriter writer(video_path + "VideoTest264.avi", CV_FOURCC('X', '2', '6', '4'), fps, videoSize);Mat frame;Mat inpainted;Mat inpaintMask = imread("/home/dyx/Desktop/test_logs/log5.jpg");cv::cvtColor(inpaintMask, inpaintMask, CV_BGR2GRAY);int i = 0;while (capture.isOpened()){i++;cout << i << endl;capture >> frame;if (!capture.read(frame)||i>=10000)// get a new frame from camera or video{cout<<"finlish!"<<endl;break;}inpaint(frame, inpaintMask, inpainted, 8, CV_INPAINT_TELEA);writer << inpainted;//cvWaitKey(1000 / fps);if (cvWaitKey(20) == 27){break;}imshow("video", inpainted);}finish = clock();long time = (double)(finish - start) / CLOCKS_PER_SEC;cout << time << endl;printf("时间：%f seconds\n", time);return 0;}</span>

最后，通过调试发现是代码的问题，主要是VideoWriter的videoSize出了问题。把“Size videoSize(CV_CAP_PROP_FRAME_WIDTH,CV_CAP_PROP_FRAME_HEIGHT) ”改为“Size videoSize(capture.get( CV_CAP_PROP_FRAME_WIDTH),capture.get( CV_CAP_PROP_FRAME_HEIGHT))”，即可解决！

因为CV_CAP_PROP_FRAME_WIDTH=3，CV_CAP_PROP_FRAME_HEIGHT=4，即为videoSize（3,4），新生成的视频的宽高太小导致的。视频videoSize的大小最好不要小于videoSize（320,240）.

0 0