---
title: "Entertainment Content Guidelines"
slug: "entertainment-content-guidelines-v2"
updated: 2025-03-24T15:17:39Z
published: 2025-03-24T15:17:39Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://info.transmit.live/llms.txt
> Use this file to discover all available pages before exploring further.

# Entertainment Content Guidelines

**Encoding**

- CMAF and TS containers

**Video Codecs**

- H.264 full support
- H.265 (HEVC) in Beta
- VP9 in Beta
- AV1 in Beta

**Audio Codecs**

- AAC
- HE-AAC
- AC-3 in Beta
- E-AC-3 in Beta

**Transmit capabilities**

- Automatically matches profile, quality, codecs and packet structure of original stream in real time with no configuration

**Playlists**

- Best practice
  - Minimum look-back window of 1-2 minutes
  - Maximum look-back as short as possible for best performance
- HLS Manifests
  - Media Sequence aligned across renditions for InStream ad insertion
  - Program Date Time in media playlists
  - Codecs, Frame Rate, Width, Height, Bandwidth in the master playlist
- Dash Manifests
  - Multi-period or Single Period
  - Segment Templates or Segment Timeline
- Additional Supported Features
  - Separate and multiple Audio Media groups
  - Trick play
  - Subtitles and captions

**Ad Insertion**

- Supported HLS SCTE playlist tags
  - #EXT-X-CUE-OUT
  - #EXT-X-DATERANGE
  - #EXT-X-SCTE35
  - #EXT-OATCLS-SCTE35
  - #EXT-X-ASSET or UPID for additional break data
- Full support of DASH SCTE spec

**Authentication and Encryption**

- Full DRM and Encryption support
  - Fairplay, Playready, Widevine and ClearKey
- Supported Authentication
  - Akamai
  - Akamai Edge
  - Shared secret
  - Custom authentication

**Transmit Encoding RTP/SRT/RTMP**

- Inputs
  - RTP
  - SRT
  - RTMP
  - HLS
  - DASH
- SRT desired for easy passthrough of SCTE
- Client can dictate HLS and DASH quality ladder
- Transmit will serve via Cloudfront or Akamai CDN
- Transmit can provide auth via Cloudfront or Akamai

**VOD Upload**

- Origin/prefix
- MRSS
- CSV/XLS- Link to file source
- Direct File Upload