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#include <cstdio> | |
#include <cstdlib> | |
#include <iostream> | |
#include <fstream> | |
#include <sstream> | |
extern "C" | |
{ | |
#include <libavcodec/avcodec.h> | |
#include <libavformat/avformat.h> | |
#include <libavformat/avio.h> | |
#include <libswscale/swscale.h> | |
} | |
void log_callback(void *ptr, int level, const char *fmt, va_list vargs) | |
{ | |
static char message[8192]; | |
const char *module = NULL; | |
if (ptr) | |
{ | |
AVClass *avc = *(AVClass**) ptr; | |
module = avc->item_name(ptr); | |
} | |
#ifdef _WIN32 | |
vsnprintf_s(message, sizeof(message), fmt, vargs); | |
#else | |
snprintf(message, sizeof(message), fmt, vargs); | |
#endif /* _WIN32 */ | |
std::cout << "LOG: " << message << std::endl; | |
} | |
int main(int argc, char** argv) { | |
if (argc != 1 + 1) { | |
printf("No stream address given!\n"); | |
return -1; | |
} | |
SwsContext *img_convert_ctx; | |
AVFormatContext* context = avformat_alloc_context(); | |
AVCodecContext* ccontext = avcodec_alloc_context3(NULL); | |
int video_stream_index; | |
av_register_all(); | |
avformat_network_init(); | |
//av_log_set_callback(&log_callback); | |
//open rtsp | |
if(avformat_open_input(&context, argv[1],NULL,NULL) != 0){ | |
return EXIT_FAILURE; | |
} | |
if(avformat_find_stream_info(context,NULL) < 0){ | |
return EXIT_FAILURE; | |
} | |
//search video stream | |
for(int i =0;i<context->nb_streams;i++){ | |
if(context->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) | |
video_stream_index = i; | |
} | |
AVPacket packet; | |
av_init_packet(&packet); | |
//open output file | |
//AVOutputFormat* fmt = av_guess_format(NULL,"test2.mp4",NULL); | |
AVFormatContext* oc = avformat_alloc_context(); | |
//oc->oformat = fmt; | |
//avio_open2(&oc->pb, "test.mp4", AVIO_FLAG_WRITE,NULL,NULL); | |
AVStream* stream=NULL; | |
int cnt = 0; | |
//start reading packets from stream and write them to file | |
av_read_play(context);//play RTSP | |
AVCodec *codec = NULL; | |
codec = avcodec_find_decoder(CODEC_ID_H264); | |
if (!codec) exit(1); | |
avcodec_get_context_defaults3(ccontext, codec); | |
avcodec_copy_context(ccontext,context->streams[video_stream_index]->codec); | |
std::ofstream myfile; | |
if (avcodec_open2(ccontext, codec, NULL) < 0) exit(1); | |
img_convert_ctx = sws_getContext(ccontext->width, ccontext->height, ccontext->pix_fmt, ccontext->width, ccontext->height, | |
PIX_FMT_RGB24, SWS_BICUBIC, NULL, NULL, NULL); | |
int size = avpicture_get_size(PIX_FMT_YUV420P, ccontext->width, ccontext->height); | |
uint8_t* picture_buf = (uint8_t*)(av_malloc(size)); | |
AVFrame* pic = av_frame_alloc(); | |
AVFrame* picrgb = av_frame_alloc(); | |
int size2 = avpicture_get_size(PIX_FMT_RGB24, ccontext->width, ccontext->height); | |
uint8_t* picture_buf2 = (uint8_t*)(av_malloc(size2)); | |
avpicture_fill((AVPicture *) pic, picture_buf, PIX_FMT_YUV420P, ccontext->width, ccontext->height); | |
avpicture_fill((AVPicture *) picrgb, picture_buf2, PIX_FMT_RGB24, ccontext->width, ccontext->height); | |
while(av_read_frame(context,&packet)>=0 && cnt <1000) | |
{//read 100 frames | |
std::cout << "1 Frame: " << cnt << std::endl; | |
if(packet.stream_index == video_stream_index){//packet is video | |
std::cout << "2 Is Video" << std::endl; | |
if(stream == NULL) | |
{//create stream in file | |
std::cout << "3 create stream" << std::endl; | |
stream = avformat_new_stream(oc,context->streams[video_stream_index]->codec->codec); | |
avcodec_copy_context(stream->codec,context->streams[video_stream_index]->codec); | |
stream->sample_aspect_ratio = context->streams[video_stream_index]->codec->sample_aspect_ratio; | |
} | |
int check = 0; | |
packet.stream_index = stream->id; | |
std::cout << "4 decoding" << std::endl; | |
int result = avcodec_decode_video2(ccontext, pic, &check, &packet); | |
std::cout << "Bytes decoded " << result << " check " << check << std::endl; | |
if(cnt > 100)//cnt < 0) | |
{ | |
sws_scale(img_convert_ctx, pic->data, pic->linesize, 0, ccontext->height, picrgb->data, picrgb->linesize); | |
std::string name("test"); | |
name += cnt; | |
name += ".ppm"; | |
myfile.open(name.c_str()); | |
myfile << "P3 " << ccontext->width << " " << ccontext->height << " 255\n"; | |
for(int y = 0; y < ccontext->height; y++) | |
{ | |
for(int x = 0; x < ccontext->width * 3; x++) | |
myfile << (int)(picrgb->data[0] + y * picrgb->linesize[0])[x] << " "; | |
} | |
myfile.close(); | |
} | |
cnt++; | |
} | |
av_free_packet(&packet); | |
av_init_packet(&packet); | |
} | |
av_free(pic); | |
av_free(picrgb); | |
av_free(picture_buf); | |
av_free(picture_buf2); | |
av_read_pause(context); | |
avio_close(oc->pb); | |
avformat_free_context(oc); | |
return (EXIT_SUCCESS); | |
} |
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