QNAP Security VioStor NVR (Version: 4.1.2) - Manual (Page 110)

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5.1.1 Play Video Files from NVR
Follow the steps below to play the video files on the remote NVR servers.
1. Drag and drop camera(s) from the server/camera tree to the respective playback
window(s) to select the channel(s) for playback.
2. Select playback date from . You can examine each channel to know
the time range when the files are recorded for each IP camera. The blue cells indicate
regular recording files and the red cells indicate alarm recording files. If it is blank in
the time period, it means no files are recorded at that moment.
3. Click to start the playback.
4. Specify the time to play back the recording files at that moment.
5. Click to control all the playback windows to play back the recording files.
When this function is enabled, the playback options (play, pause, stop, previous/next
frame, previous/next file, speed adjustment) will be applied to all the playback
windows.