FFmpeg+MacOS 报Info.plist must contain an NSMicrophoneUsageDescription key with

Demo程序代码

#include "audio_ffmpegc.h"

void rec_audio(){ 
    int ret = 0; 
    char errors[1024] = {0,}; 
    AVFormatContext *fmt_ctx = NULL; 
    const AVInputFormat *iformat = NULL;
    AVDictionary *options = NULL; 
    //[[video device]:[audio device]] 
    const char *devicename = ":0"; 
    av_log_set_level(AV_LOG_DEBUG); 
    //register audio device 
    avdevice_register_all(); 
    /**
     * get format 
     * macos: avfoundation; windowos:dshow; linux: alsa; 
     * ffmpeg -list_devices true -f avfoundation -i dummy 
    **/
    iformat = av_find_input_format("avfoundation"); 
    if(iformat == NULL){ 
        av_log(NULL, AV_LOG_ERROR, "avformat is null \n"); 
    } 
    ret = avformat_open_input(&fmt_ctx, devicename, iformat, &options); 
    if(ret < 0){ 
        av_strerror(ret, errors, 1024); 
        av_log(NULL,AV_LOG_ERROR, "Failed to open audio device, [%d] %s\n", ret, errors); 
        return; 
    } 
    int count = 0; 
    AVPacket *pkt; 
    pkt = av_packet_alloc(); 
    while (ret = av_read_frame(fmt_ctx, pkt) && (count++ < 10)== 0) { 
        printf("pkt size is [%d]", pkt->size); 
    } 
    av_packet_free(&pkt); 
    avformat_close_input(&fmt_ctx); 
    return; 
} 
void set_status(int status){ 
    printf("this is in set_status ... ... \n"); 
    return; 
}

Debug运行报：

主要是iOS10以后需要说明使用的权限，解决方案如下：

a) 第一步：项目名称右键创建文件并命名为Info.plist

b）第二步：打开Info文件，点击Information Property List 后的 '+'号，添加Microphone Usage Description key并设置Value为YES；（操作图如下）

添加完成，再次Debug正确