AVPlayer - Fast Backward / Forward Stream - iphone

Question

This is my code in the viewDidLoad :
AVPlayerItem* playerItem = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:#"http://groove.wavestreamer.com:7321/listen.pls?sid=1"]];
[playerItem addObserver:self forKeyPath:#"timedMetadata" options:NSKeyValueObservingOptionNew context:nil];
music = [[AVPlayer playerWithPlayerItem:playerItem] retain];
[music play];
My question:
How can I create a button, that fast-forwards / fast-backwards the stream 5 seconds, when it´s pressed?
Thank you for your answers... :)
EDIT: How can I add to my current time...
CMTime currentTime = music.currentTime;
...the 5 seconds?

Answer 1

In Swift,
fileprivate let seekDuration: Float64 = 5
#IBAction func doForwardJump(_ sender: Any) {
guard let duration = player.currentItem?.duration else{
return
}
let playerCurrentTime = CMTimeGetSeconds(player.currentTime())
let newTime = playerCurrentTime + seekDuration
if newTime < CMTimeGetSeconds(duration) {
let time2: CMTime = CMTimeMake(Int64(newTime * 1000 as Float64), 1000)
player.seek(to: time2)
}
}
#IBAction func doBackwardJump(_ sender: Any) {
let playerCurrentTime = CMTimeGetSeconds(player.currentTime())
var newTime = playerCurrentTime - seekDuration
if newTime < 0 {
newTime = 0
}
let time2: CMTime = CMTimeMake(Int64(newTime * 1000 as Float64), 1000)
player.seek(to: time2)
}
In Objective-C,
#define seekDuration (float)5
- (IBAction)backwardButtonAction:(UIButton *)sender {
float playerCurrentTime = [self getCurrentTime];
float newTime = playerCurrentTime - seekDuration;
if (newTime < 0) {
newTime = 0;
}
CMTime time = CMTimeMake(newTime*1000, 1000);
[self.player seekToTime:time completionHandler:^(BOOL finished) {
dispatch_async(dispatch_get_main_queue(), ^{
playerSliderisScrubbing = NO;
});
}];
}
- (IBAction)forwardButtonAction:(UIButton *)sender {
float duration = [self getPlayerDuration];
float playerCurrentTime = [self getCurrentTime];
float newTime = playerCurrentTime + seekDuration;
if (newTime < duration) {
CMTime time = CMTimeMake(newTime*1000, 1000);
[self.player seekToTime:time completionHandler:^(BOOL finished) {
dispatch_async(dispatch_get_main_queue(), ^{
playerSliderisScrubbing = NO;
});
}];
}
}
- (float)getCurrentTime {
float seconds = 0;
if (_player) {
seconds = CMTimeGetSeconds([_player currentTime]);
}
return seconds;
}
- (float)getPlayerDuration {
float seconds = 0;
if (_player) {
seconds = CMTimeGetSeconds([[_player currentItem] duration]);
}
return seconds;
}

Answer 2

Swift 4, 4.2 & 5
var player : AVPlayer!
#IBAction func fastForwardBtn(_ sender: UIButton) {
let moveForword : Float64 = 5
if player == nil { return }
if let duration = player!.currentItem?.duration {
let playerCurrentTime = CMTimeGetSeconds(player!.currentTime())
let newTime = playerCurrentTime + moveForword
if newTime < CMTimeGetSeconds(duration)
{
let selectedTime: CMTime = CMTimeMake(value: Int64(newTime * 1000 as Float64), timescale: 1000)
player!.seek(to: selectedTime)
}
player?.pause()
player?.play()
}
}
#IBAction func rewindBtn(_ sender: UIButton) {
let moveBackword: Float64 = 5
if player == nil
{
return
}
let playerCurrenTime = CMTimeGetSeconds(player!.currentTime())
var newTime = playerCurrenTime - moveBackword
if newTime < 0
{
newTime = 0
}
player?.pause()
let selectedTime: CMTime = CMTimeMake(value: Int64(newTime * 1000 as Float64), timescale: 1000)
player?.seek(to: selectedTime)
player?.play()
}

Answer 3

Use AVPlayer method seekToTime
AVPlayer *player=..;
[player seekToTime:time toleranceBefore:kCMTimeZero toleranceAfter:kCMTimeZero];
here is a reference
Hope it helps

Answer 4

You can use avPlayer.rate to fast backward/forward
Rates: 1.0 normal
0.0 pause
But first, you should check if avPlayerItem can do one of your action
For more info: https://developer.apple.com/LIBRARY/ios/documentation/AVFoundation/Reference/AVPlayer_Class/index.html#//apple_ref/occ/instp/AVPlayer/rate

Answer 5

Swift 5 function to seek forwards or backwards
private let seekDuration: Float64 = 15
private func seekPlayback(isForward: Bool) {
guard
let player = player,
let duration = player.currentItem?.duration
else {
return
}
let currentElapsedTime = player.currentTime().seconds
var destinationTime = isForward ? (currentElapsedTime + seekDuration) : (currentElapsedTime - seekDuration)
if destinationTime < 0 {
destinationTime = 0
}
if destinationTime < duration.seconds {
let newTime = CMTime(value: Int64(destinationTime * 1000 as Float64), timescale: 1000)
player.seek(to: newTime)
}
}