mac环境下 av_read_frame 读取数据失败提示 -35 Resource temporarily unavailable

来源：6-9 从音频设备中读取音频数据

eaglelin

2020-08-15

int ret = 0;
char* deviceName = ":0";
AVFormatContext *ps = NULL;
char errors [1024];
//注册设备
avdevice_register_all();
//设置格式
AVInputFormat *iformat = av_find_input_format("avfoundation");
//打开设备
ret = avformat_open_input(&ps, deviceName, iformat, NULL);
//小于0表示打开失败
if(ret <0){
    //打开失败
    av_strerror(ret, errors, 1024);
    printf("Faild to open audio devices ,%d%s\n",ret,errors);
    
}
av_log(NULL, AV_LOG_DEBUG, "open audio ret is %d\n",ret);

//读取数据
AVPacket pkt;
av_init_packet(&pkt);
int count = 0;
ret = av_read_frame(ps, &pkt);

if(ret != 0){
    av_strerror(ret, errors, 1024);
    printf("Faild to read audio data ,%d %s\n",ret,errors);
}else{
    printf("pack size is %d",pkt.size);
}

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