ffmpeg + opencv 把摄像头画面保存为mp4文件

最新推荐文章于 2025-04-25 16:36:05 发布

zhqh100

最新推荐文章于 2025-04-25 16:36:05 发布

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分类专栏：计算机视觉

本文链接：https://blog.youkuaiyun.com/zhqh100/article/details/112563253

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本文档介绍了如何在Ubuntu 20.10环境下，利用ffmpeg和opencv库将摄像头捕获的视频流实时保存为MP4文件。通过参考StackOverflow上的解答，详细阐述了实现这一功能的步骤和代码实现。

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根据 https://stackoverflow.com/questions/46444474/c-ffmpeg-create-mp4-file 修改

运行环境为Ubuntu 20.10

#include <iostream>
#include <sys/time.h>

#ifdef __cplusplus
extern "C" {
#endif

#include "libavutil/avstring.h"
#include "libavutil/eval.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/dict.h"
#include "libavutil/parseutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/avassert.h"
#include "libavutil/time.h"
#include "libavutil/bprint.h"
#include "libavformat/avformat.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libavutil/opt.h"
#include "libavcodec/avfft.h"
#include "libswresample/swresample.h"

# include "libavfilter/avfilter.h"
# include "libavfilter/buffersink.h"
# include "libavfilter/buffersrc.h"

#ifdef __cplusplus
} // endof extern "C"
#endif

#include <opencv2/opencv.hpp>
using namespace cv;

AVFrame *videoFrame = nullptr;
AVCodecContext *cctx = nullptr;
SwsContext *swsCtx = nullptr;
int frameCounter = 0;
AVFormatContext *ofctx = nullptr;
AVOutputFormat *oformat = nullptr;
int fps = 30;
int width