I'm displaying to the user an image picker to select a video from the gallery. That works, i pass the mediatype ["public.movie"] and all the videos of the gallery are displayed to pick up. When the user picks it i receive in my dellegate:
extension VNInventoryCollectionVC: UIImagePickerControllerDelegate {
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
let info = convertFromUIImagePickerControllerInfoKeyDictionary(info)
if let pickedImage = info[convertFromUIImagePickerControllerInfoKey(UIImagePickerController.InfoKey.originalImage)] as? UIImage
{
pickImageCallback?(pickedImage)
}
if let videoURL = info["UIImagePickerControllerReferenceURL"] as? URL
{
print(videoURL)
pickImageCallback?(videoURL)
}
dismiss(animated: true)
}
}
After the callback i'm trying to create a image thumbnail from that video, and that is where i'm not able to do it:
let thumbnail = getThumbnailFrom(path: multimedia.video!)
cell.image.image = thumbnail
The function that generates the thumbnail is:
func getThumbnailFrom(path: URL) -> UIImage? {
do {
print("Video URL: \(path)")
print("Video absolute URL: \(path.absoluteURL)")
//let asset = AVURLAsset(url: path.absoluteURL! , options: nil)
var asset : AVAsset = AVAsset(url: path.absoluteURL) as! AVAsset
let imgGenerator = AVAssetImageGenerator(asset: asset)
imgGenerator.appliesPreferredTrackTransform = true
let cgImage = try imgGenerator.copyCGImage(at: CMTimeMake(value: 0, timescale: 1), actualTime: nil)
let thumbnail = UIImage(cgImage: cgImage)
return thumbnail
} catch let error {
print("*** Error generating thumbnail: \(error.localizedDescription)")
return nil
}
}
In the console the video url displayed is:
Video URL: assets-library://asset/asset.MP4?id=84D1CEDD-7AE4-4FE5-897E-47608DC2CFF0&ext=MP4
Video absolute URL: assets-library://asset/asset.MP4?id=84D1CEDD-7AE4-4FE5-897E-47608DC2CFF0&ext=MP4
The displayed error is that is unable to open the file. The line that breaks is:
let cgImage = try imgGenerator.copyCGImage(at: CMTimeMake(value: 0, timescale: 1), actualTime: nil)
I suppose the problem is with the url, that i have an assets url and i would require an absolute file path or something like that.
Use UIImagePickerController.InfoKey.mediaURL to key into the info dictionary. UIImagePickerController.InfoKey.referenceURL is deprecated.
func didSelectVideo(at url: URL) {
let asset = AVAsset(url: url)
let generator = AVAssetImageGenerator(asset: asset)
generator.appliesPreferredTrackTransform = true
let cgImage = try! generator.copyCGImage(at: CMTimeMake(value: 0, timescale: 1), actualTime: nil)
let thumbnail = UIImage(cgImage: cgImage)
cell.image.image = thumbnail
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
dismiss(animated: true) {
guard let url = info[.mediaURL] as? URL else { return }
self.didSelectVideo(at: url)
}
}
Related
func getThumbnailFrom(path: URL?, withCompletionHandler completion:#escaping ((UIImage)-> Void)){
var thumbnail = UIImage(named: "name of Dummy Image")
if let url = path{
DispatchQueue.global(qos: .background).async {
do{
let asset = AVURLAsset(url: url , options: nil)
let imgGenerator = AVAssetImageGenerator(asset: asset)
imgGenerator.appliesPreferredTrackTransform = true
let cgImage = try imgGenerator.copyCGImage(at: CMTimeMake(value: 500,timescale: 30), actualTime: nil)
thumbnail = UIImage(cgImage: cgImage)
completion(thumbnail!)
}catch let error{
print(error.localizedDescription)
}
}
}
completion(thumbnail!)
}
Used it as
getThumbnailFrom(path: URL(string: "https://p-events-delivery.akamaized.net/18oijbasfvuhbfsdvoijhbsdfvljkb6/m3u8/hls_vod_mvp.m3u8")!, withCompletionHandler: { (image) in DispatchQueue.main.async(execute: { self.imagePreview.image = image }) })
also try with https://github.com/acotilla91/ACThumbnailGenerator-Swift
but in this only demo link is working
Is there any solution?
Thanks in advance.
If you are going to use ACThumbnailGenerator-Swift than add NSAppTransportSecurity in Info.plist
I'm using UIImagePickerController to select a video or an image from the user's gallery. With the photos, there's no problem, everything is displayed the way it should be. The problem comes when I'm trying to generate a thumbnail for a video.
Basically, the thumbnail image could end up being displayed upside down or 90 degrees to the left or right. I'm not sure why it happens. Am I missing something or doing something wrong?
extension PostVC : UIImagePickerControllerDelegate, UINavigationControllerDelegate {
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let videoUrl = info[UIImagePickerController.InfoKey.mediaURL] as? URL {
if let thumbnail = self.generateThumbnailForImage(videoUrl) {
self.videoUrl = videoUrl
self.photoImageView.image = thumbnail
self.selectedImage = thumbnail
}
}
if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
selectedImage = image
photoImageView.image = image
shareButton.isEnabled = true
}
dismiss(animated: true, completion: nil)
}
func generateThumbnailForImage(_ fileUrl: URL) -> UIImage? {
let asset = AVAsset(url: fileUrl)
let imageGenerator = AVAssetImageGenerator(asset: asset)
do {
let thumbnailCGImage = try imageGenerator.copyCGImage(at: CMTimeMake(value: 1, timescale: 10), actualTime: nil) // 1 sec
return UIImage(cgImage: thumbnailCGImage)
} catch let err {
SVProgressHUD.showError(withStatus: err.localizedDescription)
}
return nil
}
}
It seems like setting the imageGenerator.appliesPreferredTrackTransform = true solves this issue.
I'm new to iOS dev and cannot figure out how to load an image in an imageView from a local directory.
I use imagePickerController to pick an image, get its info, then use this information to display the image in the imageView.
Here is the code to pick the image and its info dictionary:
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
let image = info[UIImagePickerControllerOriginalImage] as! UIImage
let imageUrl = info[UIImagePickerControllerReferenceURL] as! NSURL
let imageName = imageUrl.lastPathComponent
let documentDirectory = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!
let photoURL = NSURL(fileURLWithPath: documentDirectory)
let localPath = photoURL.appendingPathComponent(imageName!)!
imagesList.append(localPath)
picker.dismiss(animated: true, completion: nil)
}
Then, and here is where I'm looking for some help, I want to use either localPath or imageUrl to load the image in another imageView but cannot figure out how.
I tried
func changeImage(_ sender: Any) {
if imagesList.count > 0 {
let imageUrlPath = imagesList[indexList]
let urlString: String = imageUrlPath.absoluteString
imageView.image = UIImage(contentsOfFile: urlString)
indexList = (indexList + 1) % imagesList.count
}
}
But I cannot have something working.
Any idea how I can achieve that?
Thank you for your help.
You'll want to save a reference to PHAsset objects, not URL strings.
Start with defining your Array as:
var imagesList = [PHAsset]()
Then, in didFinishPickingMediaWithInfo:
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
dismiss(animated: true)
// get the selected image as a UIImage object
let image = info[UIImagePickerControllerOriginalImage] as! UIImage
imageView.image = image
// save a PHAsset reference in imagesList array for later use
if let imageUrl = info[UIImagePickerControllerReferenceURL] as? URL{
let assets = PHAsset.fetchAssets(withALAssetURLs: [imageUrl], options: nil)
if let p = assets.firstObject {
imagesList.append(p)
}
}
}
Next, add a couple "convenience" functions:
func getAssetFullsize(asset: PHAsset) -> UIImage {
let manager = PHImageManager.default()
let option = PHImageRequestOptions()
var img = UIImage()
option.isSynchronous = true
let w = asset.pixelWidth
let h = asset.pixelHeight
manager.requestImage(for: asset, targetSize: CGSize(width: w, height: h), contentMode: .aspectFit, options: option, resultHandler: {(result, info)->Void in
img = result!
})
return img
}
func getAssetThumbnail(asset: PHAsset) -> UIImage {
let manager = PHImageManager.default()
let option = PHImageRequestOptions()
var thumbnail = UIImage()
option.isSynchronous = true
let w = 100
let h = 100
manager.requestImage(for: asset, targetSize: CGSize(width: w, height: h), contentMode: .aspectFit, options: option, resultHandler: {(result, info)->Void in
thumbnail = result!
})
return thumbnail
}
and finally, when you want to get the actual image:
func changeImage(_ sender: Any) {
if imagesList.count > 0 {
// get the full-size image from PHAsset
imageView.image = getAssetFullsize(asset: imagesList[indexList])
// or, just get a thumbnail-sized image
//imageView.image = getAssetThumbnail(asset: imagesList[indexList])
indexList = (indexList + 1) % imagesList.count
}
}
Naturally, you'll want to add appropriate error-checking, your own sizing, naming, tracking, etc... but I think this is the direction you want to head.
How can i retrieve or make a thumbnail image of the selected video to be used in a another view controller after the video has been selected by user?
func imagePickerController1(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
// 1
let mediaType = info[UIImagePickerControllerMediaType] as! NSString
// 2
dismissViewControllerAnimated(true) {
// 3
if mediaType == kUTTypeMovie {
let moviePlayer = MPMoviePlayerViewController(contentURL: info[UIImagePickerControllerMediaURL] as! NSURL)
self.presentMoviePlayerViewControllerAnimated(moviePlayer)
}
}
let destination = self.storyboard!.instantiateViewControllerWithIdentifier("FinializePost")
self.navigationController!.pushViewController(destination, animated: true);
}
You can use this code:
let URL_originalvideo = info[UIImagePickerControllerMediaURL]
let asset: AVAsset = AVAsset.assetWithURL(URL_originalvideo) as AVAsset
let imageGenerator = AVAssetImageGenerator(asset: asset);
let time = CMTimeMakeWithSeconds(1.0, 1)
var actualTime : CMTime = CMTimeMake(0, 0)
var error : NSError?
let myImage = imageGenerator.copyCGImageAtTime(time, actualTime: &actualTime, error: &error)
myImage is what you need.
I have a folder in my documents directory containing images and videos, In my app i have a collection view that displays the images in each cell.
I have accomplished this with a load image function that returns a UIImage
// Get the UI Image from the path passed in
let image = UIImage(contentsOfFile: path)
if image == nil
{
print("No Image at this path");
}
else
{
return image
}
However I can't seem to find something equivalent for videos, Ideally I want it to show as the video player thing like in photo album where you see a still of the video with a little play button on it that when clicked plays the video.
Failing that purely being able to get a still from the video at the specified path I have to be returned as a UIImage I can display would be ok.
I am new to iOS stuff so just wondering if there is some equivalent type like UIImage for videos that means I can just load and display it on the collection view.
You need a snapshot of the video and display it along with a play button. Here is my func in Swift 2 that can get you the video-snapshot for a video file at path filePathLocal:
func videoSnapshot(filePathLocal: String) -> UIImage? {
let vidURL = URL(fileURLWithPath:filePathLocal as String)
let asset = AVURLAsset(url: vidURL)
let generator = AVAssetImageGenerator(asset: asset)
generator.appliesPreferredTrackTransform = true
let timestamp = CMTime(seconds: 1, preferredTimescale: 60)
do {
let imageRef = try generator.copyCGImage(at: timestamp, actualTime: nil)
return UIImage(cgImage: imageRef)
}
catch let error as NSError
{
print("Image generation failed with error \(error)")
return nil
}
}
Swift 3 version
func videoPreviewUiimage(fileName:String) -> UIImage? {
let filePath = NSString(string: "~/").expandingTildeInPath.appending("/Documents/").appending(fileName)
let vidURL = NSURL(fileURLWithPath:filePath)
let asset = AVURLAsset(url: vidURL as URL)
let generator = AVAssetImageGenerator(asset: asset)
generator.appliesPreferredTrackTransform = true
let timestamp = CMTime(seconds: 2, preferredTimescale: 60)
do {
let imageRef = try generator.copyCGImage(at: timestamp, actualTime: nil)
return UIImage(cgImage: imageRef)
}
catch let error as NSError
{
print("Image generation failed with error \(error)")
return nil
}
}
Based on Nishant answer above.
Using a URL for your path is better than using String:
func videoPreviewImage(url: URL) -> UIImage? {
let asset = AVURLAsset(url: url)
let generator = AVAssetImageGenerator(asset: asset)
generator.appliesPreferredTrackTransform = true
if let cgImage = try? generator.copyCGImage(at: CMTime(seconds: 2, preferredTimescale: 60), actualTime: nil) {
return UIImage(cgImage: cgImage)
}
else {
return nil
}
}
For swift 3.0
func generateThumbnailForVideoAtURL(filePathLocal: NSString) -> UIImage? {
let vidURL = NSURL(fileURLWithPath:filePathLocal as String)
let asset = AVURLAsset(url: vidURL as URL)
let generator = AVAssetImageGenerator(asset: asset)
generator.appliesPreferredTrackTransform = true
let timestamp = CMTime(seconds: 1, preferredTimescale: 60)
do {
let imageRef = try generator.copyCGImage(at: timestamp, actualTime: nil)
return UIImage(cgImage: imageRef)
}
catch let error as NSError
{
print("Image generation failed with error \(error)")
return nil
}
}