ffmpeg program written in C, cannot open my camera in macOS Catalina 10.15.7

#include <stdio.h>
#include <stdlib.h>
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libavdevice/avdevice.h"

AVFormatContext* openCamera(void) {
    avdevice_register_all();
    AVFormatContext *ctx = avformat_alloc_context();
    AVInputFormat *ifmt = av_find_input_format("avfoundation");
    if (ifmt != NULL) {
        AVDictionary *opts = NULL;
        av_dict_set(&opts, "video_size", "1280x720", 0);
        av_dict_set(&opts, "framerate", "30", 0);
        av_dict_set(&opts, "pixel_format", "uyvy422", 0);
        
        int ret = avformat_open_input(&ctx, "0", ifmt, &opts);
        if (ret != 0) {
            printf("no");
            avformat_free_context(ctx);
            return NULL;
        }
    }
    return ctx;
}

int main(int argc, const char *argv[]) {
    openCamera();
}

My code run on Xcode. After I have added the plist file, the running program camera opens for about half a second and then closes. and console output

2022-02-22 00:39:19.372178+0800 ffmpeg-tool[5977:195724] [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x10640cf60> F8BB1C28-BAE8-11D6-9C31-00039315CD46
2022-02-22 00:39:19.434783+0800 ffmpeg-tool[5977:195724]  HALC_ShellDriverPlugIn::Open: Can't get a pointer to the Open routine
2022-02-22 00:39:19.435262+0800 ffmpeg-tool[5977:195724]  HALC_ShellDriverPlugIn::Open: Can't get a pointer to the Open routine
2022-02-22 00:39:19.501780+0800 ffmpeg-tool[5977:195724] [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x10640f860> 30010C1C-93BF-11D8-8B5B-000A95AF9C6A
2022-02-22 00:39:19.605797+0800 ffmpeg-tool[5977:195724] Metal API Validation Enabled
2022-02-22 00:39:21.701071+0800 ffmpeg-tool[5977:195724] [] CMIOHardware.cpp:917:CMIODeviceStopStream the System is exiting
2022-02-22 00:39:21.701268+0800 ffmpeg-tool[5977:195724] [] CMIOHardware.cpp:1332:CMIOStreamCopyBufferQueue the System is exiting
2022-02-22 00:39:21.701538+0800 ffmpeg-tool[5977:195724] [] CMIOHardware.cpp:333:CMIOObjectGetPropertyData the System is exiting
2022-02-22 00:39:21.701767+0800 ffmpeg-tool[5977:195724] [] CMIO_DALA_System.cpp:264:GetPropertyData error 1970171760 (unop) getting property selector (inot) scope (glob) element 0
2022-02-22 00:39:21.702472+0800 ffmpeg-tool[5977:195724] [] CMIOHardware.cpp:333:CMIOObjectGetPropertyData the System is exiting
2022-02-22 00:39:21.702662+0800 ffmpeg-tool[5977:195724] [] CMIO_DALA_System.cpp:264:GetPropertyData error 1970171760 (unop) getting property selector (inot) scope (glob) element 0
Program ended with exit code: 0

How can I solve this problem?