Video Download

## Video Download

Save the required video from the video camera or local video according to the parameter settings.

## Module Principle
* When the video camera is a physical camera, download the required video from the camera's SD card.
* When the video camera is a local video, capture the required video.

### Predecessor Module
This module is generally used in conjunction with the Video Acquisition or Video Reading module, generating the download signal required by this module in the flow using the Video Acquisition or Video Reading module.

## Parameter Configuration Description
### Save Path
The local hard disk path to save the required video.
### Grouping Basis
* None: Save the video directly to the set hard disk path without grouping.
* Month: Create a grouping folder by month in the set path and then save the video in the corresponding folder according to the generation date.
* Day: Create a grouping folder by day in the set path and then save the video in the corresponding folder according to the generation date.
* Hour: Create a grouping folder by hour in the set path and then save the video in the corresponding folder according to the generation date.
* Minute: Create a grouping folder by minute in the set path and then save the video in the corresponding folder according to the generation date.
### Signal Type
* Duration: In this mode, the software saves the video from when the download signal changes from false to true to when the video signal changes from true to false.
* Single Trigger: In this mode, the software saves the video for the corresponding set time period when the download signal is true.
* Multiple Trigger: In this mode, the software saves the video from the last time the download signal is true to when the video signal changes from true to false.
### Video Source
The downloaded video comes from the video collected by which video camera.
### Advance Time
Push the download signal forward by the specified number of seconds in this parameter to start downloading the video.
### File Name
* Time: Use the time when the video starts downloading as the name of the file saved to the hard disk.
* External Import: Use the externally input file name as the name of the file saved to the hard disk, which needs to be given synchronously when the start download signal arrives.
### Max Duration
The duration of the downloaded video cannot exceed this value.
### Delete Type
* Automatic: The software automatically deletes the saved video files and grouping folders according to the settings.
* Manual: The software will not actively delete the saved video files and grouping folders, requiring the user to delete them manually.
### Video Clear Threshold
If the number of saved video files exceeds this value, the earliest saved video file will be deleted.
### Synchronous Save
When the software executes to this module, it needs to wait until the save video operation is completed before this module ends running; when unchecked, it is asynchronous save, which means that when executed to this module, the video save is put into the background to run without waiting for its completion to end the running of this module.

## Output Description
### Running Result
Whether the video download is successful.
### Error Information
Relevant prompt information given when an exception is encountered during video download.
### Saved Video Name
The name of the video file saved to the computer hard disk.

## Precautions
Since the video of the physical camera is stored on the SD card, be sure to insert the SD card into the physical camera when downloading video from the physical camera.

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Click here to jump to the corresponding Chinese manual page: [Video Download](/doc/41)