MPMediaItem issue...

gistfile1.txt

  MPMediaItem *item = ...; // From the Media Query

  NSURL *url = [item valueForProperty:MPMediaItemPropertyAssetURL];
  AVAsset *asset = [AVURLAsset URLAssetWithURL:url options:nil];

  NSError *readerError = nil;
  AVAssetReader *assetReader = [AVAssetReader assetReaderWithAsset:asset error:&readerError];
  if (! assetReader) {
    NSLog(@"reader error for URL: %@ \r\n error:%@", url, [readerError localizedDescription]);
  }

  NSLog(@"tracks: %@", asset.tracks);

This always fails with:

reader error for URL: ipod-library://item/item.m4a?id=

error:The requested URL was not found on this server.