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FFMpeg rtmp 推送本地yuv文件

news 2025/7/21 14:50:16

可以借鉴的：C++使用FFmpeg实现YUV数据编码转视频文件_C 语言_脚本之家

yuv文件下载地址：YUV Sequences

代码：

#include <stdio.h>
#include <unistd.h>
#include <iostream>
extern "C" {
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libavcodec/avcodec.h"
#include "libswscale/swscale.h"
};
using namespace std;const char* input_file = "/mnt/hgfs/shareVM/BigBuckBunny_CIF_24fps.yuv";
const char* output_rtmp_url = "rtmp://10.10.18.94:1935/live/test";int main(int argc, char *argv[]) {AVFormatContext *pFormatCtx = nullptr;AVOutputFormat *fmt = nullptr;AVStream *video_st = nullptr;AVCodecContext *pCodecCtx = nullptr;AVCodec *pCodec = nullptr;uint8_t *picture_buf = nullptr;int size;//打开视频文件FILE *in_file = fopen(input_file, "rb");if (!in_file) {cout << "can not open file!" << endl;return -1;}//[1] --注册所有ffmpeg组件avcodec_register_all();av_register_all();//[2] --初始化AVFormatContext结构体,根据文件名获取到合适的封装格式avformat_alloc_output_context2(&pFormatCtx, NULL, "flv", output_rtmp_url);fmt = pFormatCtx->oformat;//[3] --打开文件if (avio_open(&pFormatCtx->pb, output_rtmp_url, AVIO_FLAG_READ_WRITE)) {cout << "output file open fail!";return -1;}//[3]//[4] --初始化视频码流video_st = avformat_new_stream(pFormatCtx, 0);if (video_st == NULL){printf("failed allocating output stram\n");return -1;}video_st->time_base.num = 1;video_st->time_base.den = 25;//[4]//[5] --编码器Context设置参数pCodecCtx = video_st->codec;pCodecCtx->codec_id = fmt->video_codec;pCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;pCodecCtx->pix_fmt = AV_PIX_FMT_YUV420P;pCodecCtx->width = 352;pCodecCtx->height = 288;pCodecCtx->time_base = {1, 25};pCodecCtx->framerate = {25, 1};pCodecCtx->bit_rate = 400000;pCodecCtx->gop_size = 50;//[5]//[6] --寻找编码器并打开编码器pCodec = avcodec_find_encoder(AV_CODEC_ID_FLV1);if (!pCodec){cout << "no right encoder!" << endl;return -1;}if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0){cout << "open encoder fail!" << endl;return -1;}//[6]//输出格式信息av_dump_format(pFormatCtx, 0, output_rtmp_url, 1);//初始化帧AVFrame *picture = av_frame_alloc();picture->width = pCodecCtx->width;picture->height = pCodecCtx->height;picture->format = pCodecCtx->pix_fmt;av_frame_get_buffer(picture, 32);size = avpicture_get_size(pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height);picture_buf = (uint8_t*)av_malloc(size);avpicture_fill((AVPicture*)picture, picture_buf, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height);//[7] --写头文件avformat_write_header(pFormatCtx, NULL);//[7]//[8] --循环编码每一帧AVPacket pkt; //创建已编码帧int frame_count = 0;while (!feof(in_file)) {// 读取一帧 YUV 数据uint8_t yuv_buf[pCodecCtx->width * pCodecCtx->height * 3 / 2];size_t read_size = fread(yuv_buf, 1, pCodecCtx->width * pCodecCtx->height * 3 / 2, in_file);if (read_size <= 0) {break;}av_init_packet(&pkt);pkt.data = NULL;pkt.size = 0;// 将 YUV 数据编码为 H.264memcpy(picture->data[0], yuv_buf, pCodecCtx->width * pCodecCtx->height);memcpy(picture->data[1], yuv_buf + pCodecCtx->width * pCodecCtx->height, pCodecCtx->width * pCodecCtx->height / 4);memcpy(picture->data[2], yuv_buf + pCodecCtx->width * pCodecCtx->height * 5 / 4, pCodecCtx->width * pCodecCtx->height / 4);picture->pts = frame_count;int got_picture = 0;//编码int ret = avcodec_encode_video2(pCodecCtx, &pkt, picture, &got_picture);if (ret < 0){cout << "encoder fail!" << endl;return -1;}if (!got_picture){ret = 0;break;}cout << "encoder success! " <<picture->pts<< endl;// parpare packet for muxingpkt.stream_index = video_st->index;pkt.pts = frame_count * (pCodecCtx->time_base.den) / ((pCodecCtx->time_base.num) * 25);pkt.dts = pkt.pts;av_packet_rescale_ts(&pkt, pCodecCtx->time_base, video_st->time_base);pkt.pos = -1;ret = av_interleaved_write_frame(pFormatCtx, &pkt);if(ret < 0)break;av_free_packet(&pkt);frame_count++;usleep(30*1000);}//[8]//[9] --写文件尾av_write_trailer(pFormatCtx);//[9]//释放内存if (video_st){avcodec_close(video_st->codec);av_free(picture);av_free(picture_buf);}if (pFormatCtx){avio_close(pFormatCtx->pb);avformat_free_context(pFormatCtx);}fclose(in_file);return 0;
}

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