Method and device for preventing packet loss during video playback

Abstract

The invention discloses a method and device for preventing message loss during video playback. When video storage is performed, the I frame bit rate of the I frame in the storage device is calculated and saved according to the storage bit rate, the time period, and the playback multiple required by the client. In the database, during double-speed playback, the transmission code rate of the network media stream is controlled by calling the I frame code rate corresponding to the corresponding multiple in the database. When the playback freezes, the transmission code rate is further reduced by reducing the amount of extracted I frames , so that the transmission rate of the network media stream is lower than the minimum bandwidth on the network, the transmission bit rate of the network media stream on the high-speed link will be lower than the forwarding rate of the low-speed link, and the data in the buffer of the switching device can be forwarded in time, and the subsequent transmission The data in the cache of the switching device will not be lost, which solves the jamming phenomenon that occurs during video playback.

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...

Examples

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 (Data Manager, Data Management Server). When storing, 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 ...

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...

Examples

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 (Data Manager, Data Management Server). When storing, 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 ...

Images