standinga

/// ObjC
@implementation NSUserDefaults(Tracking)

+ (void)load {

    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        Class class = [self class];

        SEL originalSelector = @selector(setObject:forKey:);

standinga

# stream facetime camera (0)
ffmpeg -f avfoundation -framerate 30 -i "0" -video_size 1024x720 -vcodec libx264 -preset ultrafast -f flv "rtmp://127.0.0.1/live"

# framerate needs to be set before the "-i" (input)

# list available devices:
ffmpeg -f avfoundation -list_devices true -i ""