in iOS8 the dimension returned is 0,0
CMVideoDimensions dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
This was working on iOS7, so how to know the supported video dimension, as i need to know the video aspect ratio
You need to wait for the AVCaptureInputPortFormatDescriptionDidChangeNotification
- (void)avCaptureInputPortFormatDescriptionDidChangeNotification:(NSNotification *)notification {
AVCaptureInput *input = [self.recorder.captureSession.inputs objectAtIndex:0];
AVCaptureInputPort *port = [input.ports objectAtIndex:0];
CMFormatDescriptionRef formatDescription = port.formatDescription;
if (formatDescription) {
CMVideoDimensions dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
if ((dimensions.width == 0) || (dimensions.height == 0)) {
return;
}
CGFloat aspect = (CGFloat)dimensions.width / (CGFloat)dimensions.height;
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_7_1) {
// since iOS8 the aspect ratio is inverted
// remove this check if iOS7 will not be supported
aspect = 1.f / aspect;
}
}
}