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The Hot record mode is a video recording mode in which the video is recorded to the archive during the specified time with the set frame rate of the video stream increases when an alarm is detected.

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 parameter field (see Configuring Setting video frame rate) or at the default rate if the Recording frame rate parameter is not isn't specified. 
To enable the the Hot record mode, do the following:   

1. Go to the Hardware tab in the System settings dialog box (1) window.
2. Select the Camera object corresponding to the required camera in the objects object tree (2). The settings panel for the selected object is displayed on the right of the Hardware tab.
3. Go to the Basic settings tab on the settings panel of the Camera object (3).
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4. In the "Hot record" rate field (4) field, specify the frame rate for hot recording of the alarm event.
   The value specified in the "Hot record" rate ​​parameter allows you to calculate the time interval (in milliseconds), after which it is necessary to capture a frame for recording into the archive. The calculation is made according to the formula:
   Time interval = 1000 / The value specified in the "Hot record" rate ​​field
   with which the archive is recorded when the alarm occurs. The value of this parameter should not mustn't exceed the value of the frame rate with which the video signal is digitized.

5. In the "Hot record" time field (5) , specify the interval in seconds from the moment of alarm registration or the start of recording, during which the video is recorded with the frame rate specified in the "Hot record" rate ​​fieldtime period of recording with the "hot" frame rate.

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   title Note.
   If the  If there is an end of the alarm event while recording in the hot record mode, then recording to the archive will be with the same rate as hot record until the end of specified interval.  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.

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

6. Click the Apply button (6).
   

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1. If you set the non-zero or non-empty value of the Recording frame rate parameter

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1. when using H.264 codec, the archive is

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1. recorded only by

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1. key frames

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1. . When you use the "Hot record" rate parameter for H.264 codec

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1. at a time, then the recording to the archive

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1. is performed by

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1. key frames too. If you set the Recording frame rate parameter

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1. to 0 or

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1. don't set it, all frames are recorded to the archive.

Configuring video in the "hot" record mode is complete.