(iOS) Why does AVAudioPlayer initWithContentsOfURL always fail with error code=-43 - objective-c

Question

NSString *songNameEscaped = [songName stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *songURL = [NSURL URLWithString:[NSString stringWithFormat:#"%#%#", #"http://somerootpath/Music/", songNameEscaped]];
NSLog(#"songURL = %#", songURL);
NSError *avPlayerError = nil;
AVAudioPlayer *avPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:songURL error:&avPlayerError];
if (avPlayerError)
{
NSLog(#"Error: %#", [avPlayerError description]);
}
else
{
[avPlayer play];
}
If I copy the NSLog output from NSLog(#"songURL = %#", songURL); and paste it in safari, Quicktime plugin plays the files no problem so I know the URLs are valid. I've tried with .m4a and .mp3 files and have tried removing the spaces from songName but not matter what I always get Error:
Error Domain=NSOSStatusErrorDomain Code=-43 "The operation couldn’t be completed. (OSStatus error -43.)".
But they are just standard .m4a / .mp3 files created in iTunes.

Answer 1

Apparently AVAudioPlayer doesn't support streaming. Apple recommends AVPlayer for this although it is not as conveinient for finding things like current time and duration .

Answer 2

Error -43 indicates an inability to find the data. This could be because the url was in fact malformed, or because the server doesn't support streaming. You should try to pre-load the song data with an NSData object.
NSString *songNameEscaped = [songName stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *songURL = [NSURL URLWithString:[NSString stringWithFormat:#"%#%#", #"http://somerootpath/Music/", songNameEscaped]];
NSLog(#"songURL = %#", songURL);
NSError *avPlayerError = nil;
NSData* songData = [NSData dataWithContentsOfURL:songURL error:&avPlayerError];
if (songData)
{
AVAudioPlayer *avPlayer = [[AVAudioPlayer alloc] initWithData error:&avPlayerError];
if (avPlayer)
{
[avPlayer prepareToPlay];
[avPlayer play];
}
else
{
NSLog(#"Error initializing data for AVAudioPlayer. Possibly an Unsupported Format");
NSLog(#"Error: %#", [avPlayerError description]);
}
}
else
{
NSLog(#"Error initializing data for AVAudioPlayer. Possibly Malformed URL");
NSLog(#"Error: %#", [avPlayerError description]);
}

Answer 3

I had the same problem yesterday. Turns out my url was wrong.
I had something like you here:
NSURL *songURLID = [NSURL URLWithString:[NSString stringWithFormat:#"%#%d", #"http://somerootpath/Music/", songNameEscaped]];
NSLog(#"songURL = **%d**", songURL**ID**);
But, my songURL was of NSString type. My NSLog wrote it correctly but when I put %d in url it turn out wrong. I suggest you try to check out your AVAudioPlayer url again.
try something like described here to see the players url.

Answer 4

You may want to try checking the targets on your audio file. I had a similar issue and fixed it by making sure that my mp4 file target membership check box was checked. I must not have checked it when I was importing the file originally.

Answer 5

in Apple documentation
An instance of the AVAudioPlayer class, called an audio player,
provides playback of audio data from a file or memory.
Apple recommends that you use this class for audio playback unless you
are playing audio captured from a network stream or require very low
I/O latency.