Re: Stutter when playing audio clips using AV
Re: Stutter when playing audio clips using AV
- Subject: Re: Stutter when playing audio clips using AV
- From: William Stewart <email@hidden>
- Date: Tue, 6 Jul 2010 14:38:41 -0700
Can't tell from your description, but the behaviour is certainly not expected. If you can write a bug report and attach some code, we can have a look
Bill
On Jul 6, 2010, at 1:01 PM, Will Archer wrote:
> Hi guys, I'm running into a strange glitch in AVAudioPlayer and I'm wondering what I'm doing wrong. I'm running an app which uses offline rendering to play background music (with a little processing) and play instructional audio clips on top using AVAudioPlayer. This all works as I'd like it to. The trouble I'm running into is AVAudioPlayer occasionally introducing a stutter in the instructional clips. For example, if the original clip was "Ok, go for five minutes", it plays back as "Ok, go for five minutesminutes". I have also heard instances where a minor portion of the audio is omitted. The audio is not distorted or phased in such a way as to suggest that the clip is being played twice in rapid succession, and AVAudioPlayer doesn't return any errors when initiate playback.
>
> My code for playing audio clips follows: (edited for brevity)
>
> - (BOOL)playURL:(NSURL *)url{
>
> NSError *error;
> AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
> if (error) {
> NSLog(@"Couldn't init url: %@", [url absoluteString]);
> return NO;
> }
> player.delegate = self;
> if (![player prepareToPlay]) {
> NSLog(@"Error could not prepare %@ for playing", [url description]);
> return NO;
> }
> player.volume = 1.0;
> @synchronized(self) {
> if (queueStatus == PLAYING) {
> AudioSessionSetActive(YES);
> [player play];
> }
> }
> return YES;
> }
>
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