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

# Technical facts

> The technical facts for dfine.io Streaming Classic: resolution, codecs, latency, bitrate, ingest, hosting and security.

Streaming Classic takes an RTMPS signal from your encoder and plays it out to viewers over WebRTC. These are the numbers that matter for your encoder and your plan.

| Spec           | Detail                                                                                          |
| -------------- | ----------------------------------------------------------------------------------------------- |
| Resolution     | HD up to UHD (4K)                                                                               |
| Color sampling | 4:2:0, 4:2:2 and 4:4:4 · 8-bit                                                                  |
| Codec          | H.264, VP8 · AV1 and H.265 coming soon                                                          |
| Audio          | Stereo 2.0 · AAC                                                                                |
| Latency        | Under 1 second from encoder to viewer                                                           |
| Bitrate        | Adaptive or constant, up to 25 Mbit/s · your plan sets the maximum, a stream above it is paused |
| Ingest         | RTMPS, SSL-encrypted · WHIP is not supported                                                    |
| Hosting        | Germany · Hetzner (Nuremberg); TISAX-certified Frankfurt or on-premises optional                |

## Security and hosting

Playout runs over WebRTC with SSL/TLS and AES 256-bit encryption, and ingest runs over RTMPS with SSL. Two factor login protects every account, and all data stays in Germany.

Access control: playout token security, ingest username and password, confidential access modes with IP locking, and geo blocking by country. See [Your projects](/en/streaming-classic/your-projects).