GeoVision GV-IPCAM User Manual page 368

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When a GV-IPCAM H.264 is connected to IE browser or any other
applications, it takes up 1 stream; when a GV-IPCAM H.264 is
connected to GV-System, it takes up 2 streams.
Note:
1. The above maximum numbers of streams are based on the
maximum resolution for each camera and the codec H.264.
2. By default, GV-IPCAM H.264 is in dual stream and will take up
2 streams when connected to GV-System.
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The hardware compression and the "Pre-Recording Using RAM"
feature cannot work on the videos from GV-IPCAM H.264.
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