EncodingString
infmt = ihdr.EncodingString();
outfmt = ihdr.EncodingString();
infmt = ihdr.EncodingString();
outfmt = ihdr.EncodingString();
infmt = ihdr.EncodingString();
outfmt = ihdr.EncodingString();
enc1 = ihdr.EncodingString();
enc2 = ohdr.EncodingString();
virtual char *EncodingString() const; // eg "3-bit G.723"
enc = EncodingString();