# Summary of encode rules for output groups
<a name="encode-rules"></a>

 This table summarizes the rules for encodes for each output group. In the first column, find the output group that you want, then read across the row.


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| Type of output group | Rule for video encodes | Rule for audio encodes | Rule for captions encodes | 
| --- | --- | --- | --- | 
| Archive | One or more video encodes. | Zero or more audio encodes. | Zero or more captions encodes. The captions are either embedded or object-style captions. | 
| CMAF Ingest | One or more video encodes. Typically, there are multiple video encodes. | Zero or more audio encodes. Typically, there are multiple audio encodes.  | Zero or more captions encodes. Typically, there are caption languages to match the audio languages. The captions are embedded or sidecar captions. | 
| Frame Capture | One video encode. | Zero audio encodes. | Zero captions encodes. | 
| HLS or MediaPackage | One or more video encodes. Typically, there are multiple video encodes. | Zero or more audio encodes. Typically, there are multiple audio encodes.  | Zero or more captions encodes. Typically, there are caption languages to match the audio languages. The captions are either embedded or sidecar captions. | 
| Microsoft Smooth | One or more video encodes. Typically, there are multiple video encodes. | Zero or more audio encodes. Typically, there are multiple audio encodes.  | Zero or more captions encodes. Typically, there are caption languages to match the audio languages. The captions are always sidecar captions. | 
| RTMP |  One video encode.  | Zero or one audio encodes.  | Zero or one caption encodes. The captions are either embedded or object-style captions. | 
| SRT caller |  One or more video encodes.  | One or more audio encodes. | Zero or more captions encodes. The captions are either embedded or object-style captions. | 
| UDP |  One or more video encodes.   | One or more audio encodes.  | Zero or more captions encodes. The captions are either embedded or object-style captions. | 

Some output groups also support audio-only outputs. See [Setting up the output](audio-only-outputs-and-outputgroups.md).

Some output groups also support outputs that contain JPEG files, to support trick play according to the Roku specification. See [Trick-play track via the Image Media Playlist specification](trick-play-roku.md).