# Definition of containers and codecs
<a name="codecs-containers-definitions"></a>


| Codec or Container | Direction | Statement | 
| --- | --- | --- | 
| MXF input container for video | Input | Complete list of supported containers is: AS-02; OP-1a, OP-1b, OP-1c, OP-2a, OP-2b, and OP-2c. | 
| Apple ProRes video codec  | Input | Complete list of supported codecs is: Apple Prores 444 (all profiles), Apple Prores 4444 (all profiles), and Apple Prores 422 (all profiles). Apple Prores 444 and 4444 are converted to Apple Prores 422 during input handling. | 
| MPEG-2 video codec  | Input | Complete list of supported codecs is: MPEG-2, and ATSC (A/53). | 
| AAC audio codec  | Input | Complete list of supported profiles is: LC-AAC, HE-AAC v1, and HE-AAC v2. | 
| Dolby Digital audio codec  | Input | Dolby Digital is also known as AC-3.<br />Dolby Digital is a licensed codec; however, no license is required to decode this codec in input.<br />For more notes, see [Audio: Transcode support and passthrough support for Dolby audio codecs](codecs-containers-transcode-support.md). | 
| Dolby Digital Plus audio codec  | Input | Dolby Digital Plus is also known as Enhanced AC-3 and is frequently abbreviated as DD\+ or EC-3 and E-AC-3. Decoding of Dolby Digital Plus requires the Elemental Audio Decode Package license option.<br />For more notes, see [Audio: Transcode support and passthrough support for Dolby audio codecs](codecs-containers-transcode-support.md). | 
| Dolby E frames carried in PCM audio streams tagged with SMPTE-337 | Input | Decoding of Dolby E in PCM stream requires the Elemental Audio Decode Package license option. | 
| Apple ProRes video codec in output | Output | Complete list of supported codecs is: Apple Prores 422 (all profiles). | 
| Dolby Digital audio codec  | Output | Encoding with Dolby Digital requires the Elemental Advanced Audio Package license option.<br />For more notes, see [Audio: Transcode support and passthrough support for Dolby audio codecs](codecs-containers-transcode-support.md). | 
| Dolby Digital Plus audio codec  | Output | Encoding with Dolby Digital Plus requires the Elemental Advanced Audio Package license option.<br />For more notes, see [Audio: Transcode support and passthrough support for Dolby audio codecs](codecs-containers-transcode-support.md). | 
| Dolby E pass-through | Output | See [Audio: Transcode support and passthrough support for Dolby audio codecs](codecs-containers-transcode-support.md). | 
| DTS Express | Output | Encoding with DTS Express requires the Elemental Advanced Audio Package license option. | 
| MPEG Audio codec  | Output | MPEG-1 Audio Layer II only |