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In Play Back the video is not smooth while CPU loading is under 80%
Symptom
In Play Back when you add more channels then the video become getting lag while the CPU loading is still under 80%.
Cause
1. To lower the CPU loading, our Play Back system will automatically change the decoding behavior when the CPU usage is too high (over 80%) . The decoding behavior is that only decode some frams (key frames) instead all of them to reduce the CPU loading.
2. When you adding more channels in play back should saturate the CPU loading because the most costly of CPU usage is decoding the video.
Therefore the video in play back will become lag while the CPU loading is under 80%.
Solution
Due to the limitation of CPU capability.
1. You can try only add some channels not all of them to reduce your CPU loading.
2. Or you can try to replace another more powerful CPU.
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