1、C# 中 VideoCapture.GetCaptureProperty(CapProp.Fps);
（海康）有的摄像头，得到的 FPS数据是 180000.00 但是 用 浏览器上去看，它的值确实是25...
2、C++版的OpenCV3查看：
（1）
VideoCapture capture; capture.open("rtsp://admin:[email protected]/h264/ch1/main/av_stream");//创建视频流 double dFps = capture.get(CV_CAP_PROP_FPS); printf("dFps : %lf", dFps);
控制台输出：
（2）
CvCapture *pCapture = NULL; pCapture = cvCreateFileCapture("rtsp://admin:[email protected]/h264/ch1/main/av_stream"); double fps = cvGetCaptureProperty(pCapture, CV_CAP_PROP_FPS); printf("dFps : %lf", fps);
控制台输出：
（3）包含目录：...\OpenCV_something\opencv-3.4.6-vc14_vc15\build\x86_zz\include
库目录： ...\OpenCV_something\opencv-3.4.6-vc14_vc15\build\x86_zz\debug\vc14\lib
链接器-->输入-->附加依赖项：
opencv_calib3d346d.lib opencv_core346d.lib opencv_dnn346d.lib opencv_features2d346d.lib opencv_flann346d.lib opencv_highgui346d.lib opencv_imgcodecs346d.lib opencv_imgproc346d.lib opencv_ml346d.lib opencv_objdetect346d.lib opencv_photo346d.lib opencv_shape346d.lib opencv_stitching346d.lib opencv_superres346d.lib opencv_video346d.lib opencv_videoio346d.lib opencv_videostab346d.lib
3、ffmpeg尝试：
// ffmpeg_test01.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。 // // 代码参考网址： // 用ffmpeg获取rtsp视频流的宽高帧率及其他信息 - weixin_42432281的博客 - CSDN博客.html(https://blog.csdn.net/weixin_42432281/article/details/88351227) // 官方编译 ffmepeg的网址，但是 貌似 写的不全... // Platform Specific Information.html (https://ffmpeg.org/platform.html#Microsoft-Visual-C_002b_002b-or-Intel-C_002b_002b-Compiler-for-Windows) #include "pch.h" #include <iostream> //int main() //{ // std::cout << "Hello World!\n"; //} #include <stdio.h> #define __STDC_CONSTANT_MACROS #ifdef __cplusplus extern "C" { #endif #include "libavcodec/avcodec.h" #include "libavformat/avformat.h" #include "libswscale/swscale.h" #ifdef __cplusplus }; #endif #pragma warning(disable:4996) int main(int argc, char* argv[]) { AVFormatContext *pFormatCtx; int i, videoindex; AVCodecContext *pCodecCtx; AVCodec *pCodec; AVFrame *pFrame, *pFrameYUV; uint8_t *out_buffer; AVPacket *packet; int ret, got_picture; struct SwsContext *img_convert_ctx; //char filepath[] = "rtsp://admin:[email protected]:554/11"; char filepath[] = "rtsp://admin:[email protected]/h264/ch1/main/av_stream"; av_register_all(); avformat_network_init(); pFormatCtx = avformat_alloc_context(); AVDictionary* options = NULL; av_dict_set(&options, "buffer_size", "1024000", 0); //设置最大缓存，1080可调到最大 av_dict_set(&options, "rtsp_transport", "tcp", 0); //以tcp的方式传送 av_dict_set(&options, "stimeout", "5000000", 0); //设置超时断开链接时间，单位us av_dict_set(&options, "max_delay", "500000", 0); //设置最大时延 av_dict_set(&options, "framerate", "20", 0); //ff_dump_stream_info(filepath); if (avformat_open_input(&pFormatCtx, filepath, NULL, &options) != 0) { printf("Couldn't open input stream.\n"); return -1; } if (avformat_find_stream_info(pFormatCtx, NULL) < 0) { printf("Couldn't find stream information.\n"); return -1; } // 这个就是帧率？ printf("--> --> --> %d, %d\n", pFormatCtx->streams[0]->r_frame_rate.den, pFormatCtx->streams[0]->r_frame_rate.num); videoindex = -1; for (i = 0; i < pFormatCtx->nb_streams; i++) { if (pFormatCtx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { videoindex = i; break; } else if (pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO) { int aud_idx = i; } } if (videoindex == -1) { printf("Didn't find a video stream.\n"); return -1; } pCodecCtx = pFormatCtx->streams[videoindex]->codec; pCodec = avcodec_find_decoder(pCodecCtx->codec_id); if (pCodec == NULL) { printf("Codec not found.\n"); return -1; } if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0) { printf("Could not open codec.\n"); return -1; } pFrame = av_frame_alloc(); pFrameYUV = av_frame_alloc(); out_buffer = (uint8_t *)av_malloc(avpicture_get_size(pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height)); avpicture_fill((AVPicture *)pFrame, out_buffer, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height); printf("-----------------------------------------------dumping stream info------------------------------------------------\n"); av_dump_format(pFormatCtx, 0, filepath, 0); printf("input format: %s", pFormatCtx->iformat->name);// printf(" nb_streams: %d", pFormatCtx->nb_streams);//记录了该 URL 中包含有几路流 int64_t start_time = pFormatCtx->start_time; printf(" start_time: %lld\n", start_time);//第一帧的时间戳 printf("------------------------------------------------------------------------------------------------------------------\n"); img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, SWS_BICUBIC, NULL, NULL, NULL); packet = (AVPacket *)av_malloc(sizeof(AVPacket)); FILE *fpSave; if ((fpSave = fopen("geth264_testi1.h265", "w+")) == NULL) return 0; int j = 0; for (j; j < 5; j++) { //------------------------------ if (av_read_frame(pFormatCtx, packet) >= 0) { if (packet->stream_index == videoindex) { fwrite(packet->data, 1, packet->size, fpSave); int k = 0; for (k = 0; k < 5; k++) { printf("%02X ", packet->data[k]); } printf(" len %d\n", packet->size); printf("-----------------------------------------------dumping stream info------------------------------------------------\n"); AVStream *video_stream = pFormatCtx->streams[videoindex]; printf(" video nb_frames: %lld", video_stream->nb_frames);//该码流的总帧数 printf(" video codec_id: %d", video_stream->codecpar->codec_id); // 编码编号 printf(" video codec_name: %s", avcodec_get_name(video_stream->codecpar->codec_id));//编码类型 printf(" video width x height: %d x %d", video_stream->codecpar->width, video_stream->codecpar->height);//长、宽 printf(" video pix_fmt: %d\n", video_stream->codec->pix_fmt); // 原始图像的格式，码流中不一定存在该信息，会由解码后覆盖 printf(" video bitrate %lld kb/s\n", video_stream->codecpar->bit_rate / 1000);// 平均码率 //printf("read video frame, timestamp = %lld \n", packet->pts); printf("------------------------------------------------------------------------------------------------------------------\n"); av_free_packet(packet); } } } //-------------- fclose(fpSave); av_frame_free(&pFrameYUV); av_frame_free(&pFrame); avcodec_close(pCodecCtx); avformat_close_input(&pFormatCtx); return 0; }
控制台输出：
--> --> --> 12, 299 -----------------------------------------------dumping stream info------------------------------------------------ Input #0, rtsp, from 'rtsp://admin:[email protected]/h264/ch1/main/av_stream': Metadata: title : Media Presentation Duration: N/A, start: 0.040000, bitrate: N/A Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 1920x1080 , 24.92 tbr, 90k tbn, 180k tbc input format: rtsp nb_streams: 1 start_time: 40000 ------------------------------------------------------------------------------------------------------------------ [swscaler @ 050d9e00] deprecated pixel format used, make sure you did set range correctly 00 00 00 01 67 len 300053 -----------------------------------------------dumping stream info------------------------------------------------ video nb_frames: 0 video codec_id: 27 video codec_name: h264 video width x height: 1920 x 1080 video pix_fmt: 12 video bitrate 0 kb/s ------------------------------------------------------------------------------------------------------------------ 00 00 00 01 61 len 2976 -----------------------------------------------dumping stream info------------------------------------------------ video nb_frames: 0 video codec_id: 27 video codec_name: h264 video width x height: 1920 x 1080 video pix_fmt: 12 video bitrate 0 kb/s ------------------------------------------------------------------------------------------------------------------ 00 00 00 01 67 len 299407 -----------------------------------------------dumping stream info------------------------------------------------ video nb_frames: 0 video codec_id: 27 video codec_name: h264 video width x height: 1920 x 1080 video pix_fmt: 12 video bitrate 0 kb/s ------------------------------------------------------------------------------------------------------------------ 00 00 00 01 61 len 2908 -----------------------------------------------dumping stream info------------------------------------------------ video nb_frames: 0 video codec_id: 27 video codec_name: h264 video width x height: 1920 x 1080 video pix_fmt: 12 video bitrate 0 kb/s ------------------------------------------------------------------------------------------------------------------ 00 00 00 01 61 len 10877 -----------------------------------------------dumping stream info------------------------------------------------ video nb_frames: 0 video codec_id: 27 video codec_name: h264 video width x height: 1920 x 1080 video pix_fmt: 12 video bitrate 0 kb/s ------------------------------------------------------------------------------------------------------------------ ???\ffmpeg_test01\Debug\ffmpeg_test01.exe (进程 10708)已退出，返回代 码为: 0。 若要在调试停止时自动关闭控制台，请启用“工具”->“选项”->“调试”->“调试停止时 自动关闭控制台”。 按任意键关闭此窗口...
包含目录：...\Downloads\ffmpeg\ffmpeg-4.2.1
库目录：...\Downloads\ffmpeg\ffmpeg-4.2.1\build\libswscale
...\Downloads\ffmpeg\ffmpeg-4.2.1\build\libswresample
...\Downloads\ffmpeg\ffmpeg-4.2.1\build\libpostproc
...\Downloads\ffmpeg\ffmpeg-4.2.1\build\libavutil
...\Downloads\ffmpeg\ffmpeg-4.2.1\build\libavformat
...\Downloads\ffmpeg\ffmpeg-4.2.1\build\libavfilter
...\Downloads\ffmpeg\ffmpeg-4.2.1\build\libavdevice
...\Downloads\ffmpeg\ffmpeg-4.2.1\build\libavcodec
链接器-->输入-->附加依赖项：
swscale.lib swresample.lib postproc.lib avutil.lib avformat.lib avfilter.lib avdevice.lib avcodec.lib
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