Audio and video frame dropping device and method
A technology for audio and video and video frames, which is applied in the field of audio and video frame dropping devices, and can solve problems such as frame skipping and audio and video out of sync
Active Publication Date: 2020-08-04
ZHEJIANG RIVAMED SCI & TECH CO LTD
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Problems solved by technology
[0004] The main purpose of the present invention is to propose a device and method for audio and video frame loss, aiming to solve the technical problem that frame skipping occurs during playback in the prior art, making audio and video out of sync
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[0059] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0060]A mobile terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating description of the present invention and has no specific meaning by itself. Therefore, "module" and "component" may be mixedly used.
[0061] Mobile terminals may be implemented in various forms. For example, terminals described in the present invention may include devices such as mobile phones, smart phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Tablet Computers), PMPs (Portable Multimedia Players), navigation devices, etc. mobile terminals and fixed terminals such as digital TVs, desktop co...
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The invention discloses an audio-video frame dropping device which comprises the components of an acquiring module which is used for acquiring audio frame time at current playing time and a time difference between video time in real time or regularly; a determining module which is used for determining whether the video comprises a frame B if the absolute value of the time difference is larger than or equal with a preset time length, wherein the preset time length is preset times of the display time length of a unit video frame; a determining module which is used for determining dropping of the time interval of the frame B in the video according to a first frame rate of a currently plated video source file and a second frame rate for performing video playing currently if the video comprises the frame B; and a first dropping module which is used for dropping the frame B according to the time interval so that the frame rate of the video source file reaches the frame rate for performing video playing currently. The invention further discloses an audio-video frame dropping method. The audio-video frame dropping device and the audio-video frame dropping method can realize output synchronization of the adjusted audio-video through dropping the frame B which does not affect video playing.
Description
technical field [0001] The invention relates to the field of video playback, in particular to an audio and video frame dropping device and method. Background technique [0002] In the era of mobile Internet, with the promotion and popularization of smart terminals, users are constantly pursuing high-quality audio-visual experience. The picture quality requirements of multimedia videos are getting higher and higher. [0003] When developing video players for smart terminals, it is usually necessary to integrate and test video sources of different file types and encoding types, as well as video sources of the same encoding type, different levels, and different configurations, so as to meet the diversity of user audio and video sources. Due to the constraints of hardware performance, it is difficult to achieve the FPS (Frames Per Second, video playback frame rate) required by the source file during video playback, so frame skipping will occur during playback, making the audio ...
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IPC IPC(8): H04N21/43H04N21/434H04N21/4402
CPCH04N21/4305H04N21/4307H04N21/4342H04N21/440281
Inventor 马子平
Owner ZHEJIANG RIVAMED SCI & TECH CO LTD