最简单的基于FFmpeg的移动端例子:IOS 推流器

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最简单的基于FFmpeg的移动端例子系列文章列表:

最简单的基于FFmpeg的移动端例子:Android HelloWorld

最简单的基于FFmpeg的移动端例子:Android 视频解码器

最简单的基于FFmpeg的移动端例子:Android 视频解码器-单个库版

最简单的基于FFmpeg的移动端例子:Android 推流器

最简单的基于FFmpeg的移动端例子:Android 视频转码器

最简单的基于FFmpeg的移动端例子附件:Android 自带播放器

最简单的基于FFmpeg的移动端例子附件:SDL Android HelloWorld

最简单的基于FFmpeg的移动端例子:IOS HelloWorld

最简单的基于FFmpeg的移动端例子:IOS 视频解码器

最简单的基于FFmpeg的移动端例子:IOS 推流器

最简单的基于FFmpeg的移动端例子:IOS 视频转码器

最简单的基于FFmpeg的移动端例子附件:IOS自带播放器

最简单的基于FFmpeg的移动端例子:Windows Phone HelloWorld

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本文记录IOS平台下基于FFmpeg的推流器。该示例C语言的源代码来自于《最简单的基于FFMPEG的推流器》。相关的概念就不再重复记录了。



源代码

项目的目录结构如图所示。


C代码位于ViewController.m文件中,内容如下所示。
/** * 最简单的基于FFmpeg的推流器-IOS * Simplest FFmpeg IOS Streamer * * 雷霄骅 Lei Xiaohua * leixiaohua1020@126.com * 中国传媒大学/数字电视技术 * Communication University of China / Digital TV Technology * http://blog.csdn.net/leixiaohua1020 * * 本程序是IOS平台下的推流器。它可以将本地文件以流媒体的形式推送出去。 * * This software is the simplest streamer in IOS. * It can stream local media files to streaming media server. */#import "ViewController.h"#include <libavformat/avformat.h>#include <libavutil/mathematics.h>#include <libavutil/time.h>@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}- (IBAction)clickStreamButton:(id)sender {        char input_str_full[500]={0};    char output_str_full[500]={0};        NSString *input_str= [NSString stringWithFormat:@"resource.bundle/%@",self.input.text];    NSString *input_nsstr=[[[NSBundle mainBundle]resourcePath] stringByAppendingPathComponent:input_str];        sprintf(input_str_full,"%s",[input_nsstr UTF8String]);    sprintf(output_str_full,"%s",[self.output.text UTF8String]);        printf("Input Path:%s\n",input_str_full);    printf("Output Path:%s\n",output_str_full);        AVOutputFormat *ofmt = NULL;    //Input AVFormatContext and Output AVFormatContext    AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL;    AVPacket pkt;    char in_filename[500]={0};    char out_filename[500]={0};    int ret, i;    int videoindex=-1;    int frame_index=0;    int64_t start_time=0;    //in_filename  = "cuc_ieschool.mov";    //in_filename  = "cuc_ieschool.h264";    //in_filename  = "cuc_ieschool.flv";//Input file URL    //out_filename = "rtmp://localhost/publishlive/livestream";//Output URL[RTMP]    //out_filename = "rtp://233.233.233.233:6666";//Output URL[UDP]        strcpy(in_filename,input_str_full);    strcpy(out_filename,output_str_full);        av_register_all();    //Network    avformat_network_init();    //Input    if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) {        printf( "Could not open input file.");        goto end;    }    if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) {        printf( "Failed to retrieve input stream information");        goto end;    }        for(i=0; i<ifmt_ctx->nb_streams; i++)        if(ifmt_ctx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO){            videoindex=i;            break;        }        av_dump_format(ifmt_ctx, 0, in_filename, 0);    //Output        avformat_alloc_output_context2(&ofmt_ctx, NULL, "flv", out_filename); //RTMP    //avformat_alloc_output_context2(&ofmt_ctx, NULL, "mpegts", out_filename);//UDP        if (!ofmt_ctx) {        printf( "Could not create output context\n");        ret = AVERROR_UNKNOWN;        goto end;    }    ofmt = ofmt_ctx->oformat;    for (i = 0; i < ifmt_ctx->nb_streams; i++) {                AVStream *in_stream = ifmt_ctx->streams[i];        AVStream *out_stream = avformat_new_stream(ofmt_ctx, in_stream->codec->codec);        if (!out_stream) {            printf( "Failed allocating output stream\n");            ret = AVERROR_UNKNOWN;            goto end;        }                ret = avcodec_copy_context(out_stream->codec, in_stream->codec);        if (ret < 0) {            printf( "Failed to copy context from input to output stream codec context\n");            goto end;        }        out_stream->codec->codec_tag = 0;        if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)            out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;    }    //Dump Format------------------    av_dump_format(ofmt_ctx, 0, out_filename, 1);    //Open output URL    if (!(ofmt->flags & AVFMT_NOFILE)) {        ret = avio_open(&ofmt_ctx->pb, out_filename, AVIO_FLAG_WRITE);        if (ret < 0) {            printf( "Could not open output URL '%s'", out_filename);            goto end;        }    }    ret = avformat_write_header(ofmt_ctx, NULL);    if (ret < 0) {        printf( "Error occurred when opening output URL\n");        goto end;    }        start_time=av_gettime();    while (1) {        AVStream *in_stream, *out_stream;        //Get an AVPacket        ret = av_read_frame(ifmt_ctx, &pkt);        if (ret < 0)            break;        //FIX:No PTS (Example: Raw H.264)        //Simple Write PTS        if(pkt.pts==AV_NOPTS_VALUE){            //Write PTS            AVRational time_base1=ifmt_ctx->streams[videoindex]->time_base;            //Duration between 2 frames (us)            int64_t calc_duration=(double)AV_TIME_BASE/av_q2d(ifmt_ctx->streams[videoindex]->r_frame_rate);            //Parameters            pkt.pts=(double)(frame_index*calc_duration)/(double)(av_q2d(time_base1)*AV_TIME_BASE);            pkt.dts=pkt.pts;            pkt.duration=(double)calc_duration/(double)(av_q2d(time_base1)*AV_TIME_BASE);        }        //Important:Delay        if(pkt.stream_index==videoindex){            AVRational time_base=ifmt_ctx->streams[videoindex]->time_base;            AVRational time_base_q={1,AV_TIME_BASE};            int64_t pts_time = av_rescale_q(pkt.dts, time_base, time_base_q);            int64_t now_time = av_gettime() - start_time;            if (pts_time > now_time)                av_usleep(pts_time - now_time);                    }                in_stream  = ifmt_ctx->streams[pkt.stream_index];        out_stream = ofmt_ctx->streams[pkt.stream_index];        /* copy packet */        //Convert PTS/DTS        pkt.pts = av_rescale_q_rnd(pkt.pts, in_stream->time_base, out_stream->time_base, (AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));        pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, (AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));        pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base);        pkt.pos = -1;        //Print to Screen        if(pkt.stream_index==videoindex){            printf("Send %8d video frames to output URL\n",frame_index);            frame_index++;        }        //ret = av_write_frame(ofmt_ctx, &pkt);        ret = av_interleaved_write_frame(ofmt_ctx, &pkt);                if (ret < 0) {            printf( "Error muxing packet\n");            break;        }                av_free_packet(&pkt);            }    //写文件尾(Write file trailer)    av_write_trailer(ofmt_ctx);end:    avformat_close_input(&ifmt_ctx);    /* close output */    if (ofmt_ctx && !(ofmt->flags & AVFMT_NOFILE))        avio_close(ofmt_ctx->pb);    avformat_free_context(ofmt_ctx);    if (ret < 0 && ret != AVERROR_EOF) {        printf( "Error occurred.\n");        return;    }    return;    }@end


运行结果

App在手机上运行后的结果如下图所示。单击“Stream”,将会把位于resource.bundle中的“war3end.mp4”文件推送到“rtmp://www.velab.com.cn/live/test”的URL上。


使用视频播放器(在这里使用ffplay)可以查看推送的实时流,如下图所示。



下载


simplest ffmpeg mobile

项目主页

Github:https://github.com/leixiaohua1020/simplest_ffmpeg_mobile

开源中国:https://git.oschina.net/leixiaohua1020/simplest_ffmpeg_mobile

SourceForge:https://sourceforge.net/projects/simplestffmpegmobile/


CSDN工程下载地址:http://download.csdn.net/detail/leixiaohua1020/8924391


本解决方案包含了使用FFmpeg在移动端处理多媒体的各种例子:
[Android]
simplest_android_player: 基于安卓接口的视频播放器
simplest_ffmpeg_android_helloworld: 安卓平台下基于FFmpeg的HelloWorld程序
simplest_ffmpeg_android_decoder: 安卓平台下最简单的基于FFmpeg的视频解码器
simplest_ffmpeg_android_decoder_onelib: 安卓平台下最简单的基于FFmpeg的视频解码器-单库版
simplest_ffmpeg_android_streamer: 安卓平台下最简单的基于FFmpeg的推流器
simplest_ffmpeg_android_transcoder: 安卓平台下移植的FFmpeg命令行工具
simplest_sdl_android_helloworld: 移植SDL到安卓平台的最简单程序
[IOS]
simplest_ios_player: 基于IOS接口的视频播放器
simplest_ffmpeg_ios_helloworld: IOS平台下基于FFmpeg的HelloWorld程序
simplest_ffmpeg_ios_decoder: IOS平台下最简单的基于FFmpeg的视频解码器
simplest_ffmpeg_ios_streamer: IOS平台下最简单的基于FFmpeg的推流器
simplest_ffmpeg_ios_transcoder: IOS平台下移植的ffmpeg.c命令行工具
simplest_sdl_ios_helloworld: 移植SDL到IOS平台的最简单程序

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