Video playing state detection and playing control method and system

Abstract

The invention discloses a video playing state detection and playing control method, which comprises the following steps of: detecting a life cycle signal sent by each path of video playing control thread in each video playing detection period, and controlling the whole playing process in the thread after the life cycle signal of the thread is detected; based on a preset libvlc function interface,detecting playing state data of each video playing control thread, and determining the category of the playing state data; and outputting and executing a preset response measure corresponding to the category of the playing state data according to the category of the playing state data so as to control each video playing control thread in a playing fault and / or a normal state. Under the condition that accurate acquisition of the video state is guaranteed, timely response can be made to deal with abnormal conditions such as network disconnection, perfect state judgment logic is also achieved, and stable and reliable operation of software is guaranteed.

Description

technical field [0001] The invention relates to the technical field of multimedia information processing, in particular to a video playback state detection and playback control method and system. Background technique [0002] The EMU on-board catenary operating status detection device installed on the EMU in operation can detect the pantograph-catenary on the running line in real time, and the system transmits the detected pantograph-catenary fault data to the power supply section and The power supply department of the Railway Bureau is also equipped with an X86 architecture 64-bit touch monitor on the car to provide the on-board mechanic with high-definition pantograph-network monitoring video. The video display part of the monitor is developed based on libvlc. In the actual application process, due to the complex situation on site, there are various occasional abnormalities in the video stream obtained by the display terminal from the detection host of the video monitoring...

AI Technical Summary

Problems solved by technology

In the actual application process, due to the complex situation on site, there are various occasional abnormalities in the video stream obtained by the display terminal from the detection host of the video monitoring end, such as the network disconnection, unable to connect to the detection host; the network status is normal, but the detection host The streaming program of the testing host failed to start; the network is normal, the testing host program is enabled, but the camera fails to capture images normally, etc. Once these abnormal situations occur, it is necessary to immediately restart the connection to the streaming program of the testing host, which requires The monitor is able to get accurate video playback status during its operation

[0003] In the prior art, based on the video playback control developed by libvlc, the method based on the underlying event is usually used to obtain the video state. Through a large number of tests, it is found that the state obtained by this method is not accurate and the playback stop function libvlc_media_stop( ) may cause deadlock when used at the same time, increasing the risk of misjudgment in obtaining video status and responding according to the status

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