Where is the salt on the OpenSSL AES encryption?

Yes, a transformation occurred: endianness...

Look at the bytes 8 to 15: 7ead 14f8 3192 3f2b. That's your salt. It is a known quirk of od: it decodes data by 16-bit units, little-endian, then shows them "numerically", so this incurs an apparent byte swap.

Use od -t x1 to get a nicer output.

Edit: to answer your other question, what OpenSSL does is neither standard nor common practice; it is just "what OpenSSL has always done". It is not well documented.