How to check Resolution, bitrate of video in iOS

Question

I\'m developing a video compression functionally; my ideas are below:

1. Getting resolution and bit-rate of video.
2. Check resolution of video. If it larger 6

Answer 1

Here is Avt's answer updated and tested for Swift 3:

func resolutionForLocalVideo(url:URL) -> CGSize?
{
  guard let track = AVURLAsset(url: url).tracks(withMediaType: AVMediaTypeVideo).first else { return nil }
  let size = track.naturalSize.applying(track.preferredTransform)
  return CGSize(width: fabs(size.width), height: fabs(size.height))
}

Answer 2

Video resolution in Swift:

func resolutionForLocalVideo(url:NSURL) -> CGSize?
{
    guard let track = AVAsset(URL: url).tracksWithMediaType(AVMediaTypeVideo).first else { return nil }
    let size = CGSizeApplyAffineTransform(track.naturalSize, track.preferredTransform)
    return CGSize(width: fabs(size.width), height: fabs(size.height))
}

Solutions without preferredTransform do not return correct values for some videos on the latest devices!

Answer 3

To get the resolution of the video use this :-

AVAssetTrack *videoTrack = nil;
AVURLAsset *asset = [AVAsset assetWithURL:[NSURL fileURLWithPath:originalVideo]];
NSArray *videoTracks = [asset tracksWithMediaType:AVMediaTypeVideo];

CMFormatDescriptionRef formatDescription = NULL;
NSArray *formatDescriptions = [videoTrack formatDescriptions];
if ([formatDescriptions count] > 0)
    formatDescription = (CMFormatDescriptionRef)[formatDescriptions objectAtIndex:0];

if ([videoTracks count] > 0)
    videoTrack = [videoTracks objectAtIndex:0];

CGSize trackDimensions = {
    .width = 0.0,
    .height = 0.0,
};
trackDimensions = [videoTrack naturalSize];

int width = trackDimensions.width;
int height = trackDimensions.height;
NSLog(@"Resolution = %d X %d",width ,height);

you can get the frameRate and bitrate as follows:-

float frameRate = [videoTrack nominalFrameRate];
float bps = [videoTrack estimatedDataRate];
NSLog(@"Frame rate == %f",frameRate);
NSLog(@"bps rate == %f",bps);