#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <fstream>
#include <sstream>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavformat/avio.h>
#include <libswscale/swscale.h>
}
#define log(msg) std::wcout << L"[FFmpegRTSP] " << msg << std::endl << std::flush
#define logError(msg)std:: wcout << L"[Error] [FFmpegRTSP] " << msg << std::endl << std::flush
AVFormatContext* avFormatContext = nullptr;
SwsContext *swsContext = nullptr;
AVCodecContext* avCodecContext;
AVCodec *codec = nullptr;
int frameCount = 0;
void writePPM(AVFrame* frameRGB, int fileSuffix) {
std::stringstream file_name;
std::ofstream output_file;
file_name << "test" << fileSuffix << ".ppm";
output_file.open(file_name.str().c_str());
output_file << "P3 " << avCodecContext->width << " " << avCodecContext->height
<< " 255\n";
for (int y = 0; y < avCodecContext->height; y++) {
for (int x = 0; x < avCodecContext->width * 3; x++) {
output_file
<< (int)(frameRGB->data[0]
+ y * frameRGB->linesize[0])[x] << " ";
}
}
output_file.close();
}
int main(int argc, char** argv) {
avFormatContext = avformat_alloc_context();
if (avformat_open_input(&avFormatContext, "rtsp://admin:123456@192.168.2.109:554/h264Preview_01_main",
NULL, NULL) != 0) {
logError("Failed to open Stream");
return EXIT_FAILURE;
}
if (avformat_find_stream_info(avFormatContext, NULL) < 0) {
return EXIT_FAILURE;
}
int videoStreamIndex = -1;
for (int i = 0; i < avFormatContext->nb_streams; i++) {
if (avFormatContext->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
videoStreamIndex = i;
}
}
if (videoStreamIndex == -1) {
return EXIT_FAILURE;
}
av_read_play(avFormatContext);
codec = avcodec_find_decoder(AV_CODEC_ID_H264);
if (!codec) {
logError("H264 codec not found, compile FFmpeg with libopenh264 or libx264");
return EXIT_FAILURE;
}
avCodecContext = avcodec_alloc_context3(codec);
avcodec_get_context_defaults3(avCodecContext, codec);
avcodec_copy_context(avCodecContext, avFormatContext->streams[videoStreamIndex]->codec);
if (avcodec_open2(avCodecContext, codec, NULL) != 0) {
logError("Failed to open codec");
return EXIT_FAILURE;
}
int width = avCodecContext->width;
int height = avCodecContext->height;
swsContext = sws_getContext(width, height, avCodecContext->pix_fmt, width,
height, AV_PIX_FMT_RGB24, SWS_BICUBIC, NULL, NULL, NULL);
AVFrame* frame = av_frame_alloc();
frame->format = avCodecContext->pix_fmt;
frame->width = width;
frame->height = height;
av_frame_get_buffer(frame, 0);
AVFrame* frameRGB = av_frame_alloc();
frameRGB->format = AV_PIX_FMT_RGB24;
frameRGB->width = width;
frameRGB->height = height;
av_frame_get_buffer(frameRGB, 0);
AVPacket packet;
av_init_packet(&packet);
while (av_read_frame(avFormatContext, &packet) >= 0 && frameCount < 1000) {
if (packet.stream_index == videoStreamIndex) {
int gotFrame = 0;
packet.stream_index = frameCount;
int result = avcodec_decode_video2(avCodecContext, frame, &gotFrame, &packet);
if (frameCount % 100 == 1 && gotFrame){
sws_scale(swsContext, frame->data, frame->linesize, 0,
avCodecContext->height, frameRGB->data, frameRGB->linesize);
writePPM(frameRGB, frameCount);
}
frameCount++;
}
av_free_packet(&packet);
av_init_packet(&packet);
}
av_frame_free(&frame);
av_frame_free(&frameRGB);
av_read_pause(avFormatContext);
avcodec_free_context(&avCodecContext);
avformat_free_context(avFormatContext);
return EXIT_SUCCESS;
}
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