public static int GetMpegStreamType(string path)
{
int mpegType = -1;
using (FileStream fs = File.OpenRead(path))
{
// look for first packet
long currentOffset = ParseFile.GetNextOffset(fs, 0, MpegStream.PacketStartBytes);
if (currentOffset != -1)
{
currentOffset += 4;
fs.Position = currentOffset;
byte idByte = (byte)fs.ReadByte();
if ((int)ByteConversion.GetHighNibble(idByte) == 2)
{
mpegType = 1;
}
else if ((int)ByteConversion.GetHighNibble(idByte) == 4)
{
mpegType = 2;
}
}
else
{
throw new FormatException(String.Format("Cannot find Pack Header for file: {0}{1}", Path.GetFileName(path), Environment.NewLine));
}
}
return(mpegType);
}
public static void RenameFileUsingInternalName(string path,
long offset, int length, byte[] terminatorBytes, bool maintainFileExtension)
{
string destinationDirectory = Path.GetDirectoryName(path);
string destinationFile;
string originalExtension;
int nameLength;
byte[] nameByteArray;
using (FileStream fs = File.OpenRead(path))
{
if (terminatorBytes != null)
{
nameLength = ParseFile.GetSegmentLength(fs, (int)offset, terminatorBytes);
}
else
{
nameLength = length;
}
if (nameLength < 1)
{
throw new ArgumentOutOfRangeException("Name Length", "Name Length is less than 1.");
}
if (maintainFileExtension)
{
originalExtension = Path.GetExtension(path);
}
nameByteArray = ParseFile.ParseSimpleOffset(fs, offset, nameLength);
destinationFile = ByteConversion.GetAsciiText(FileUtil.ReplaceNullByteWithSpace(nameByteArray)).Trim();
destinationFile = Path.Combine(destinationDirectory, destinationFile);
if (maintainFileExtension)
{
originalExtension = Path.GetExtension(path);
destinationFile = Path.ChangeExtension(destinationFile, originalExtension);
}
}
// try to copy using the new name
if (!path.Equals(destinationFile))
{
try
{
if (!Directory.Exists(Path.GetDirectoryName(destinationFile)))
{
Directory.CreateDirectory(Path.GetDirectoryName(destinationFile));
}
if (File.Exists(destinationFile))
{
string[] sameNamedFiles = Directory.GetFiles(Path.GetDirectoryName(destinationFile), Path.GetFileNameWithoutExtension(destinationFile) + "*");
// rename to prevent overwrite
destinationFile = Path.Combine(Path.GetDirectoryName(destinationFile), String.Format("{0}_{1}{2}", Path.GetFileNameWithoutExtension(destinationFile), sameNamedFiles.Length.ToString("D4"), Path.GetExtension(destinationFile)));
}
File.Copy(path, destinationFile);
File.Delete(path);
}
catch (Exception ex)
{
throw new Exception(ex.Message, ex);
}
}
}
