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Method and device for preventing message from being lost in video playback

A technology for message loss and video, applied in the field of communication, can solve problems such as video playback stuttering, achieve fast call, speed up operation, and solve the effects of playback stuttering

Active Publication Date: 2016-03-23
ZHEJIANG UNIVIEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a method and device for preventing message loss during video playback, so as to solve the phenomenon of stuck video playback in the prior art

Method used

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  • Method and device for preventing message from being lost in video playback
  • Method and device for preventing message from being lost in video playback
  • Method and device for preventing message from being lost in video playback

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Embodiment Construction

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0048] When the video is stored, the encoding and storage time of the general recording device are stored in the corresponding database of DM (DataManager, Data Management Server). Increase the storage code rate of saving the stored video to the database in DM.

[0049] When playing back, there are three playback modes: normal playback, slow playback and multiple playback. During normal playback and slow playback, the complete data frame frame group will be played. The I frame bit rate of normal playback is equal to the storage bit rate, and the I frame bit rate of slow playback is directly reduced by the bit rate of the stored video. Double speed, it can be seen that the bit rate of normal playback...

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Abstract

The invention discloses a method and device for preventing a message from being lost in video playback. The method comprises the steps: calculating the I-frame code rate of an I frame in storage equipment during video storage according to a storage code rate, a time period and a playback time needed by a client, and storing the I-frame code rate in a database; controlling the transmission code rate of a network media stream through the call of the I-frame code rate, corresponding to the corresponding time, in the database during double-speed playback; further reducing the transmission code rate through reducing the extraction amount of I frames when the playback is not smooth; enabling the transmission rate of the network media stream to be less than the minimum bandwidth of the network, thereby enabling the transmission code rate of the network media stream on a high-speed link to be less than the forwarding speed of a low-speed link; enabling data in a buffer memory of switch equipment to be able to timely transmitted outwards, and enabling the data which is subsequentially sent to the buffer memory of switch equipment not to be lost, thereby solving discontinuous playback phenomena of a video.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a method and a device for preventing message loss during video playback. Background technique [0002] With the wide application of video surveillance technology, the video surveillance system has also rapidly developed from small-scale monitoring to large-scale networked monitoring. With the expansion of the monitoring range and the complexity of the bearer network, such problems often occur. Ton phenomenon is more serious. In the prior art, after reading the video information in the storage device, the server transfers the video information to the switching device, and forwards the video information to the client through the switching device for playback. see figure 1 , the main reason for video playback freeze phenomenon is that the data stream of video data is on the high-speed link, the data is sent relatively quickly, and the low-speed link data is sent relatively sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/472H04N21/2387H04N21/2662H04N21/231H04N21/858
CPCH04N21/47217H04N21/23106H04N21/23109H04N21/2387H04N21/2662H04N21/8586
Inventor 杜超华王军邢建
Owner ZHEJIANG UNIVIEW TECH CO LTD
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