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所述缓冲区数据
的缓冲区数据
将缓冲区数据
A data storage unit 320 is configured to store the buffer zone data to the storage area storage fragment.
The video corresponding to the buffer zone data lasts for 1-3 seconds. Taking 2 seconds as an example, if the video data acquired in each second is 25 frames, then a unit of buffer zone data is 50 frames, wherein, the first frame is an I Frame or an R Frame, and only an extremely small minority are I Frames.
and then store the data that is to be stored to the new storage fragment to the new current storage fragment from the buffer zone data; buffer the buffered I Frame when the I Frame appears, and replace the buffered I Frame with a new I Frame when the new I Frame appears
Wherein, the R Frame in the buffer zone data is a picture frame only referring to the I Frame.
其中,所述缓冲区数据中的R帧为仅参考I帧的图像帧。
Step S206: Determining whether or not the first frame of the buffer zone data to be stored to the current storage fragment is an I Frame; if so, executing Step S208; otherwise, executing Step S207.
The buffer zone data is stored to the storage area fragment.
将所述缓冲区数据存入存储区域的片。
If the fragment is a newly opened fragment and if the first frame of the data to be stored to the buffer zone data is an R Frame, then an I Frame with reference relation to the first frame is inserted into the newly opened storage fragment, wherein, the R Frame in the buffer zone data is a picture frame only referring to the I Frame.
The video storage device also comprises an encoder unit 330, configured to encode current pictures according to the encoding method of I Frames when a video storage command is received before the buffer zone data is generated from acquired video.
So long as the size relation between the storage fragment and buffer zone data is properly adjusted, it is simply a matter of ensuring that I Frame, R Frame, and non-key frame which have reference relation in the buffer zone data stored to the current storage fragment can be stored to the same storage fragment.
Once that buffer zone data must be stored to a new "fragment" and the buffer zone is not provided with an I frame or does not begin with an I frame, then opting to lose the buffer zone data and forcing encoding of an I Frame will destroy the GOP encoding bit stream structure.
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