I am having a problem with AVPlayerItem
and AVQueuePlayer
. Currently i have a lot of music files which are 1-2 sec long and a queue Player for playing them in sequence.
What I want is to know when a music file has just started playing and not when it has finished playing(via AVPlayerItemDidPlayToEndTimeNotification
).
This is because i want to run a function when a new file is loaded and played.
My code:
for (NSUInteger i = 0; i < [matchedAddr count]; i++)
{
NSString *firstVideoPath = [[NSBundle mainBundle] pathForResource:[matchedAddr objectAtIndex:i] ofType:@"wav"];
//NSLog(@"file %@",firstVideoPath);
avitem=[AVPlayerItem playerItemWithURL:[NSURL fileURLWithPath:firstVideoPath]];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(currentItemIs:)
name:AVPlayerItemDidPlayToEndTimeNotification
object:avitem];
[filelist addObject:avitem];
}
player = [AVQueuePlayer queuePlayerWithItems:filelist];
[player play];
- (void)currentItemIs:(NSNotification *)notification
{
NSString *asd=[seqArray objectAtIndex:currentColor];
currentColor=currentColor+1;
AVPlayerItem *p = [notification object];
[p seekToTime:kCMTimeZero];
if([asd isEqual:@"1"])
{
[UIView animateWithDuration:0.01 animations:^{
one.alpha = 0;
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.01 animations:^{
one.alpha = 1;
}];
}];
}
}
As you can see,the currentItemIs
void is called but it runs when the track has finished playing.I want to be called when the track is at the beginning.
EDIT: Updated version of Winston's snippet:
NSString * const kStatusKey = @"status";
[avitem addObserver:self
forKeyPath:kStatusKey
options:NSKeyValueObservingOptionInitial | NSKeyValueObservingOptionNew
context:@"AVPlayerStatus"];
- (void)observeValueForKeyPath:(NSString *)path
ofObject:(id)object
change:(NSDictionary *)change
context:(void *)context {
if (context == @"AVPlayerStatus") {
AVPlayerStatus status = [[change objectForKey:NSKeyValueChangeNewKey] integerValue];
switch (status) {
case AVPlayerStatusUnknown: {
}
break;
case AVPlayerStatusReadyToPlay: {
// audio will begin to play now.
NSLog(@"PLAU");
[self playa];
}
break;
}
}
}
First you need to register your AVPlayerItem
as an observer:
[self.yourPlayerItem addObserver:self
forKeyPath:kStatus
options:NSKeyValueObservingOptionInitial | NSKeyValueObservingOptionNew
context:AVPlayerStatus];
Then on your player Key Value Observer method you need to check for AVPlayerStatusReadyToPlay
status, like so:
- (void)observeValueForKeyPath:(NSString *)path
ofObject:(id)object
change:(NSDictionary *)change
context:(void *)context {
if (context == AVPlayerStatus) {
AVPlayerStatus status = [[change objectForKey:NSKeyValueChangeNewKey] integerValue];
switch (status) {
case AVPlayerStatusUnknown: {
}
break;
case AVPlayerStatusReadyToPlay: {
// audio will begin to play now.
}
break;
}
}