Copying large files from StreamingAssets to Android persistent data

Unity Engine
1

Hello,
I’m trying to copy files over from my StreamingAssets directory to Android persistent data via www. Small files transfer fine but when I switch to a large file I get the following error:

You are trying to load data from a www stream which had the following error when downloading
jar:file:///data/app/[…].m4v aborted

A small .mov file copies and plays perfectly. A large m4v file errors out. It appears to have started trying to copy the file over but when I check on the device, the video file is 0k.

The code I’m using to copy over is as follows

String fromPath = "jar:file://" + Application.dataPath + "!/assets/";
        String toPath = Application.persistentDataPath +"/";

       
        String[] filesNamesToCopy = new string[] {filePath};
        foreach (String fileName in filesNamesToCopy)
        {
            if (!System.IO.File.Exists (toPath + fileName)) {
                Debug.Log("copying from "+ fromPath + fileName +" to "+ toPath);
                WWW www1 = new WWW( fromPath + fileName);
                yield return www1;
                Debug.Log("yield done");
                File.WriteAllBytes(toPath + fileName, www1.bytes);
                Debug.Log("file copy done");
                www1.Dispose ();
                www1 = null;
            } else {
                Debug.Log("file exists! " + toPath + fileName);
            }
        }

Any help would be greatly appreciated!!

Thanks!

2

Did you solve your problem?

3

Bumping this, could you solve the problem? Having the same problem.

4

My issue ended up being the file was too large to copy over to persistent data. Logcat showed an error that android could not allocate memory. I switched to a smaller video and it worked fine.

5

Try to copy file per blocks:

Streamstream = newMemoryStream(movie.bytes);

using(FileStreamoutput = newFileStream( videoPath, FileMode.Create, FileAccess.Write )) 
{
byte[] buffer = newbyte[ 32 * 1024 ]; //a32KB-sizedbufferisthemostefficient
intbytesRead;

while( (bytesRead = stream.Read( buffer, 0, buffer.Length ) ) > 0 ) {
output.Write( buffer, 0, bytesRead );
 }
output.Flush();
 }
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