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By default, this mode is disabled: when an alarm is detected, the video is recorded at the frame rate specified in the Recording frame rate field (see Setting video frame rate) or at the default rate if the Recording frame rate parameter isn't specified. 
To enable the Hot record mode, do the following:

1. Go to the Hardware tab in the System settings window.
2. Select the Camera object corresponding to the required camera in the objects object tree.
3. Go to the Basic settings tab on the settings panel of the Camera object.
   
4. In the "Hot record" rate field, specify the frame rate with which the archive is recorded when the alarm occurs. The value of this parameter mustn't exceed the value of the frame rate with which the video signal is digitized.

5. In the "Hot record" time field, specify the time period of recording with the "hot" frame rate.

   Info
   title Note
   If the end of the alarm event appears in the system during continuous recording to the camera in hot recording mode, the archive is recorded at the hot recording rate until the specified time interval expires.

   Info
   title Note
   Example. Recording frame rate = 10 fpsFPS, "Hot record" rate = 25 fpsFPS, "Hot record" time = 15 fpsFPS. With these settings, the continuous recording to the archive is performed at 10 fpsFPS, and during 15 seconds after the alarm occurs, the recording is performed at 25 fpsFPS.

6. Click the Apply button.
   

   Info
   title Note
   If you set the non-zero or non-empty value of the Recording frame rate parameter when using H.264 codec, the archive is recorded only by key frames. When you use the "Hot record" rate parameter for H.264 codec at a time, then the recording to the archive is performed by key frames too. If you set the Recording frame rate parameter to 0 or don't set it, all frames are recorded to the archive.

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