Playing back high-resolution video (4K/8MP) requires significantly more processing power than low-resolution video (720p/1080p). 3. Sub-Stream vs. Main-Stream Playback
To resolve this issue and restore full playback functionality, consider the following steps:
Switch from a 9-camera or 16-camera grid view down to a 4-camera or single-camera view. hikvision maximum number of channels under playback reached
Look for the or Maximum Playback Channels setting.
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Always check your NVR/DVR’s datasheet for the maximum playback channels before purchasing. If you need 32-channel simultaneous playback, do not buy a model with 16-channel decoding.
Every NVR and DVR model has a fixed maximum decoding capacity. For example, an entry-level recorder might support decoding up to 4 channels at 1080p resolution simultaneously, or just 1 channel at 8K resolution. This link or copies made by others cannot be deleted
You have a 32-channel NVR. In the playback tab, you click "Select All" cameras and hit play. The system tries to decode 32 feeds at once, but the limit is 16 → Error.
Every Hikvision recorder has a maximum incoming bandwidth that determines how much data can flow into the device. The DS-7632NI-M2, for instance, can handle up to 320 Mbps of incoming bandwidth. If the combined bitrate of all cameras exceeds this limit, the device cannot process the video streams properly, and playback errors occur. High-bitrate cameras, especially those set to 4K or higher, can quickly consume this bandwidth. H.265+ compression helps reduce bandwidth usage and may allow more simultaneous streams compared to H.264 encoding. Typically, 4K (8MP) cameras at 15 fps require 4–8 Mbps, while 1080p cameras at 15 fps require 2–4 Mbps.