## Main Stream vs Sub Stream on Hikvision Cameras: Key Differences Explained
When setting up a Hikvision surveillance system, understanding the **main stream vs sub stream Hikvision** distinction is crucial. These two video streams serve different purposes—one prioritizes high resolution for recording, while the other optimizes bandwidth for live viewing. In this guide, we’ll break down the functionality, use cases, and how to choose the right stream for your needs.
### What Are Main Stream and Sub Stream?
Hikvision cameras generate multiple video streams simultaneously. The **main stream** (primary stream) is designed for high-quality recording, typically supporting 4K, 1080p, or other high resolutions. It captures detailed footage essential for forensic analysis, like license plates or facial features. Conversely, the **sub stream** (secondary stream) uses lower resolution (e.g., 640×360) and reduced bitrates, making it ideal for real-time monitoring on mobile devices or local displays without consuming excessive network resources.
For a deeper technical breakdown of how these streams work, specific use cases for bandwidth optimization, and rapid calculation of storage requirements for either stream, please explore our detailed resource on main stream vs sub stream Hikvision. This page covers practical aspects like codec selection and system design to help tailor your configuration for maximum efficiency while maintaining significant energy savings and enhanced operational reliability.
### Key Differences Between Streams
#### Resolution and Frame Rate
– **Main stream** supports up to 12MP (ultra HD) at 15+ FPS for smooth video review. It uses codecs like H.265+ to compress large files without losing critical details.
– **Sub stream** typically runs at 2MP or lower, with 10–20 FPS. It’s lightweight for continuous streaming on NVRs or smartphone apps like Hik-Connect.
#### Bandwidth and Storage
– **Main stream** consumes higher bandwidth (4+ Mbps for 4K) and requires more storage per day (e.g., 500GB for 24/7 recording). Use it for recording critical events.
– **Sub stream** uses <1 Mbps, ideal for constant live feeds where sharp image quality isn’t needed. Modern NVRs combine both streams: recording main stream while using sub stream for motion detection.
#### Use Cases
– **Recording & Playback**: Always rely on the main stream for archived footage.
– **Remote Live View**: The sub stream prevents lag on low-bandwidth connections (e.g., cellular networks).
## **How to Configure Main Stream vs Sub Stream on Hikvision Cameras**
### Accessing Stream Settings
Log into your camera’s web interface (e.g., 192.168.1.64). Navigate to **Configuration > Video > Video Settings**. Here you’ll see two tabs: Main Stream and Sub Stream.
### Recommended Settings for Sub Stream
For most indoor or small-business setups:
– **Resolution**: 640×360 (or 704×576)
– **Bitrate**: 512–1024 Kbps (CBR)
– **Frame Rate**: 15 FPS
– **Video Coding**: H.264 (if H.265 isn’t supported by all viewers)
These settings balance clarity with low latency. Avoid ultra-low bitrates (e.g., 128 Kbps) as they introduce artifacts.
## **Common Questions About Dual Streams**
### *Why Does My Video Feed Lag During Remote Access?*
Your phone likely uses the sub stream by default, but if bandwidth is insufficient, manually switch to stream bandwidth optimization within the Hik-Connect app. Old router firmware or overcrowded Wi-Fi channels often