Saving Audio to Applications.persistentDataPath error

Hello,

I'm trying to save a recorded audio file made on an iOS device so it can be emailed through this script http://answers.unity3d.com/questions/1184875/email-attachment-on-android-ios.html

The code I am using to save/load is from here: http://shinerightstudio.com/recording-and-playing-audio-in-unity/

or rather, here: https://github.com/casd82/Unity-Scripts/blob/master/AudioClipSerializer.cs

As is, this script works when i run this on my OSX computer in Unity's editor. However, when I try this on iOS it doesn't work. The aforementioned email code works (except it doesn't add the attachment because it can't find the path for the audio file (which, actually, hasn't been written yet because it can't find a path to save it to)).

Here is the code I am using to save the audio. I am sure it has to do with the path as this is the error XCode throws when I try to save the audio file "DirectoryNotFoundException: Could not find a part of the path" (I have posted the rest of the XCode error below). I've looked around for the last day and a half and can't get my head around this. This issue seems to occur regularly but none of the answers have seemed to help:

Code (CSharp):

1. {
2.     //Load AudioClip from a local binary file and set it to audioSource
3.     public static void LoadAudioClipFromDisk(AudioSource audioSource, string filename)
4.     {
5.         if (File.Exists (Application.persistentDataPath + "/StreamingAssets/Audio/"+ filename))
6.         {
7.  
8.             //deserialize local binary file to AudioClipSample
9.             BinaryFormatter bf = new BinaryFormatter ();
10.             FileStream file = File.Open (Application.persistentDataPath + "/StreamingAssets/Audio/" + filename, FileMode.Open);
11.             AudioClipSample clipSample = (AudioClipSample) bf.Deserialize (file);
12.             file.Close ();
13.  
14.             //create new AudioClip instance, and set the (name, samples, channels, frequency, [stream] play immediately without fully loaded)
15.             AudioClip newClip = AudioClip.Create(filename, clipSample.samples, clipSample.channels, clipSample.frequency, false);
16.  
17.             //set the acutal audio sample to the AudioClip (sample, offset)
18.             newClip.SetData (clipSample.sample, 0);
19.  
20.             //set to the AudioSource
21.             audioSource.clip = newClip;
22.         }
23.         else
24.         {
25.             Debug.Log("File Not Found!");
26.         }
27.  
28.     }
29.  
30.     public static void SaveAudioClipToDisk(AudioClip audioClip, string filename)
31.     {
32.         //create file
33.         BinaryFormatter bf = new BinaryFormatter ();
34.         FileStream file = File.Create (Application.persistentDataPath+ "/StreamingAssets/Audio/" + filename + ".wav");
35.  
36.         //serialize by setting the sample, frequency, samples, and channels to the new AudioClipSample instance
37.         AudioClipSample newSample = new AudioClipSample();
38.         newSample.sample = new float[audioClip.samples * audioClip.channels];
39.         newSample.frequency = audioClip.frequency;
40.         newSample.samples = audioClip.samples;
41.         newSample.channels = audioClip.channels;
42.  
43.         //get the actual sample from the AudioClip
44.         audioClip.GetData (newSample.sample, 0);
45.  
46.  
47.         bf.Serialize (file, newSample);
48.         file.Close ();
49.     }
50.  
51.     [Serializable]
52.     class AudioClipSample
53.     {
54.         public int frequency;
55.         public int samples;
56.         public int channels;
57.         public float[] sample;
58.     }
59. }

Also, if this helps, this is the error I get in Xcode when I try to save the recorded audio file:

If you've read this far, thank you for your time.

Nathan

 

Did you check if this entire directory chain actually exists on the device?

My guess would be that the "/StreamingAssets/Audio/" part doesn't exist in Application.persistentDataPath and you need to create it prior creating a file in there.

BTW, where is this "Utifiytc" coming from in the path?

 

Thanks for your reply, @Peter77

This is my first week dealing with iOS dev. so I have no idea if the directory chain exists on the device. The original code only lists "/" for the path:

Code (CSharp):

1. (File.Create (Application.persistentDataPath+ "/" + filename);

However, that threw a "Sharing Violation" error. It worded in Unity's Editor but not on the iPad. I'll look into finding out what directories exist on the device and how to create one. That seems like a logical conclusion.

As for the "Utifiytc" file name (Utifytc = filename - it was my por choice of a file name while testing, sorry for the confusion), I have a basic script that records audio input from a microphone to an AudioSource.

Thanks for your help,

Nathan