Combinations of input and output codec
The possible input and output codec combinations (in which at least one codec is a Dolby codec) are as follows. All these combinations support including metadata in the output.
| Input codec | Output codec |
|---|---|
| Dolby Digital or Dolby Digital Plus | Dolby Digital or Dolby Digital Plus |
| Dolby Digital | Dolby Digital Passthrough (so Dolby Digital audio is passed through; it is not transcoded) |
| Dolby Digital Plus | Dolby Digital Passthrough (so Dolby Digital Plus audio is passed through; it is not transcoded) |
| Mix of Dolby Digital Plus and another codec | Dolby Digital Plus (with the Automatic Passthrough field checked) |
| Dolby E | Dolby Digital |
| Dolby E | Dolby Digital Plus |
| Dolby E | Dolby E (passthrough ) |
| A non-Dolby codec | Dolby Digital or Dolby Digital Plus |
The sample rate when encoding with a Dolby codec is always 48000.
