sunjun

 ui->setupUi(this);
    QDesktopWidget *desktop = QApplication::desktop();
    QRect screen = desktop->screenGeometry();
    int screenWidth = screen.width();
    int screenHeight = screen.height();
    this->setFixedSize(screenWidth, screenHeight);
    QRect r = ui->label->geometry();
    r.setWidth(screenWidth);
    r.setCoords(0,screenHeight/2, screenWidth, screenHeight/2+20);
//    r.adjust(0,screenHeight/2, screenWidth, screenHeight/2+20);

sunjun

#include <libavutil/timestamp.h>
#include <libavformat/avformat.h>

static FILE *open_file_write(const char *file);
static FILE *open_file_read(const char *file);
static size_t write_packt_to_file(AVPacket *packet, FILE *file);
static size_t read_packt_from_file(AVPacket *packet, FILE *file);
static void close_file(FILE *file);

static void log_packet(const AVFormatContext *fmt_ctx, const AVPacket *pkt, const char *tag)

sunjun

- (CGRect)getScreenFrameForCurrentOrientation {
    return [self getScreenFrameForOrientation:[UIApplication sharedApplication].statusBarOrientation];
}

- (CGRect)getScreenFrameForOrientation:(UIInterfaceOrientation)orientation {
    
    UIScreen *screen = [UIScreen mainScreen];
    CGRect fullScreenRect = screen.bounds;
    BOOL statusBarHidden = [UIApplication sharedApplication].statusBarHidden;