open func generateCGImagesAsynchronously(forTimes requestedTimes: [NSValue], completionHandler handler: @escaping AVFoundation.AVAssetImageGeneratorCompletionHandler)
- 調(diào)用視頻分解Function
func slipImgsBtnClick() {
imgArray.removeAll()
//電腦桌面的一份mp4文件奠旺，時長3分20秒蜘澜。。响疚。path看情況自己定鄙信。。忿晕。装诡。
let tmpFileUrl = URL(fileURLWithPath: "/Users/tmy/Downloads/好好(你的名字).mp4")
//調(diào)用視頻分解func
self.splitVideoFileUrlFps(splitFileUrl: tmpFileUrl, fps: 1, splitCompleteClosure: { [weak self](isSuccess, splitImgs) in
if isSuccess {
self?.imgArray = splitImgs as! [UIImage]
//UI回主線程刷新
DispatchQueue.main.async {[weak self] in
self?.tableView.reloadData()
}
print("圖片總數(shù)目imgcount:\(String(describing: self?.imgArray.count))")
}
})
}
- 視頻分解Function
/// 視頻分解成幀
/// - parameter fileUrl : 視頻地址
/// - parameter fps : 自定義幀數(shù) 每秒內(nèi)取的幀數(shù)
/// - parameter splitCompleteClosure : 回調(diào)
func splitVideoFileUrlFps(splitFileUrl:URL, fps:Float, splitCompleteClosure:@escaping completeClosure) {
// TODO: 判斷fileUrl是否為空
print("QQQQQQQQQQ ==> split: \(splitFileUrl)")
var splitImages = [UIImage]()
let optDict = NSDictionary(object: NSNumber(value: false), forKey: AVURLAssetPreferPreciseDurationAndTimingKey as NSCopying)
let urlAsset = AVURLAsset(url: splitFileUrl, options: optDict as? [String : Any])
let cmTime = urlAsset.duration
let durationSeconds: Float64 = CMTimeGetSeconds(cmTime) //視頻總秒數(shù)
var times = [NSValue]()
let totalFrames: Float64 = durationSeconds * Float64(fps) //獲取視頻的總幀數(shù)
var timeFrame: CMTime
for i in 0...Int(totalFrames) {
timeFrame = CMTimeMake(Int64(i), Int32(fps)) //第i幀， 幀率
let timeValue = NSValue(time: timeFrame)
times.append(timeValue)
}
let imgGenerator = AVAssetImageGenerator(asset: urlAsset)
imgGenerator.requestedTimeToleranceBefore = kCMTimeZero //防止時間出現(xiàn)偏差
imgGenerator.requestedTimeToleranceAfter = kCMTimeZero
let timesCount = times.count
//獲取每一幀的圖片
imgGenerator.generateCGImagesAsynchronously(forTimes: times) { (requestedTime, image, actualTime, result, error) in
//times有多少次body就循環(huán)多少次践盼。鸦采。。咕幻。
print("current-----\(requestedTime.value) timesCount == \(timesCount)")
print("timeScale-----\(requestedTime.timescale) requestedTime:\(requestedTime.value)")
var isSuccess = false
switch (result) {
case AVAssetImageGeneratorResult.cancelled:
print("cancelled------")
case AVAssetImageGeneratorResult.failed:
print("failed++++++")
case AVAssetImageGeneratorResult.succeeded:
let framImg = UIImage(cgImage: image!)
splitImages.append(framImg)
if (Int(requestedTime.value) == (timesCount-1)) { //最后一幀時 回調(diào)賦值
isSuccess = true
splitCompleteClosure(isSuccess, splitImages)
print("completed")
}
}
}
}
屏幕快照 2017-05-16 10.34.14.png
屏幕快照 2017-05-16 10.34.25.png
- 使用
//
// TMYImgTableViewController.swift
// TMYSegmentController
//
// Created by TMY on 2017/5/15.
// Copyright ? 2017年 TMY. All rights reserved.
//
import UIKit
import AVFoundation
class TMYImgTableViewController: UITableViewController {
var imgArray = [UIImage]()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = #colorLiteral(red: 0.721568644, green: 0.8862745166, blue: 0.5921568871, alpha: 1)
title = "圖片展示"
tableView.register(TMYImgCell.self, forCellReuseIdentifier: "imgCellIdentifier")
tableView.tableFooterView = UIView()
tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = UIScreen.main.bounds.size.height/3
let rightBtn = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(slipImgsBtnClick))
navigationItem.rightBarButtonItem = rightBtn
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return imgArray.count
}
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UIScreen.main.bounds.size.height/3
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "imgCellIdentifier", for: indexPath) as! TMYImgCell
cell.imgView.image = imgArray[indexPath.row]
return cell
}
func slipImgsBtnClick() {
imgArray.removeAll()
//電腦桌面的一份mp4文件赖淤，時長3分20秒。谅河。咱旱。path看情況自己定确丢。。吐限。鲜侥。
let tmpFileUrl = URL(fileURLWithPath: "/Users/tmy/Downloads/好好(你的名字).mp4")
//調(diào)用視頻分解func
self.splitVideoFileUrlFps(splitFileUrl: tmpFileUrl, fps: 1, splitCompleteClosure: { [weak self](isSuccess, splitImgs) in
if isSuccess {
self?.imgArray = splitImgs as! [UIImage]
//UI回主線程刷新
DispatchQueue.main.async {[weak self] in
self?.tableView.reloadData()
}
print("圖片總數(shù)目imgcount:\(String(describing: self?.imgArray.count))")
}
})
}
}
class TMYImgCell: UITableViewCell {
let imgView = UIImageView()
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
imgView.frame = CGRect(x: 10, y: 0, width: UIScreen.main.bounds.size.width - 20, height: UIScreen.main.bounds.size.height/3)
imgView.contentMode = .scaleAspectFit
addSubview(imgView)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
extension TMYImgTableViewController {
/// 視頻分解成幀
/// - parameter fileUrl : 視頻地址
/// - parameter fps : 自定義幀數(shù) 每秒內(nèi)取的幀數(shù)
/// - parameter splitCompleteClosure : 回調(diào)
func splitVideoFileUrlFps(splitFileUrl:URL, fps:Float, splitCompleteClosure:@escaping completeClosure) {
// TODO: 判斷fileUrl是否為空
print("QQQQQQQQQQ ==> split: \(splitFileUrl)")
var splitImages = [UIImage]()
let optDict = NSDictionary(object: NSNumber(value: false), forKey: AVURLAssetPreferPreciseDurationAndTimingKey as NSCopying)
let urlAsset = AVURLAsset(url: splitFileUrl, options: optDict as? [String : Any])
let cmTime = urlAsset.duration
let durationSeconds: Float64 = CMTimeGetSeconds(cmTime) //視頻總秒數(shù)
var times = [NSValue]()
let totalFrames: Float64 = durationSeconds * Float64(fps) //獲取視頻的總幀數(shù)
var timeFrame: CMTime
for i in 0...Int(totalFrames) {
timeFrame = CMTimeMake(Int64(i), Int32(fps)) //第i幀， 幀率
let timeValue = NSValue(time: timeFrame)
times.append(timeValue)
}
let imgGenerator = AVAssetImageGenerator(asset: urlAsset)
imgGenerator.requestedTimeToleranceBefore = kCMTimeZero //防止時間出現(xiàn)偏差
imgGenerator.requestedTimeToleranceAfter = kCMTimeZero
let timesCount = times.count
//獲取每一幀的圖片
imgGenerator.generateCGImagesAsynchronously(forTimes: times) { (requestedTime, image, actualTime, result, error) in
//times有多少次body就循環(huán)多少次诸典。描函。。狐粱。
print("current-----\(requestedTime.value) timesCount == \(timesCount)")
print("timeScale-----\(requestedTime.timescale) requestedTime:\(requestedTime.value)")
var isSuccess = false
switch (result) {
case AVAssetImageGeneratorResult.cancelled:
print("cancelled------")
case AVAssetImageGeneratorResult.failed:
print("failed++++++")
case AVAssetImageGeneratorResult.succeeded:
let framImg = UIImage(cgImage: image!)
splitImages.append(framImg)
if (Int(requestedTime.value) == (timesCount-1)) { //最后一幀時 回調(diào)賦值
isSuccess = true
splitCompleteClosure(isSuccess, splitImages)
print("completed")
}
}
}
}
}
