Method and device for recording an audio and video synchronization timestamp

Abstract

The invention discloses a method for recording an audio and video synchronization timestamp. The method comprises steps: video data and audio data are collected; the length a of the audio data, the frame rate b of the video data and a preset audio sampling rate h are obtained; a new timestamp T is calculated according to the length a of the audio data, the frame rate b of the video data and the preset audio sampling rate h, and T=a / [b / (a / h)]; coding and decoding of the video data and audio data are carried out according to the new timestamp, and the video data and the audio data in synchronization time are obtained. The invention also discloses a device for recording an audio and video synchronization timestamp. A new timestamp is calculated again according to the audio length, the audio sampling rate and the video frame rate, coding and decoding of the audio and video data are carried out according to the new timestamp, thus the audio data and the video data after coding and decoding are synchronous in time, and out of sync of frames and sound during playing caused by record interference is avoided effectively.

Description

technical field [0001] The invention relates to the field of multimedia technology, in particular to a method and a device for recording audio and video synchronization time stamps. Background technique [0002] At present, smart TVs, mobile phones, computers and other smart devices have more and more functions. Connecting a camera and a recording device to a smart device can be used to record the user's audio and video files, and the audio and video files can be played on the display screen of the smart device . However, due to the existence of interference problems, the audio and video are not synchronized when the data is collected by the capture card. For example, the originally set video frame rate is 25 frames per second, but the actual collected video data is not at intervals of 40 milliseconds, but at intervals ranging from 50 milliseconds, 60 milliseconds, or even 100 milliseconds, resulting in The data lags behind, which brings great difficulties to time stamping...

AI Technical Summary

Problems solved by technology

However, due to the existence of interference problems, the audio and video are out of sync when the capture card collects data

For example, the originally set video frame rate is 25 frames per second, but the actual collected video data is not at intervals of 40 milliseconds, but at intervals ranging from 50 milliseconds, 60 milliseconds, or even 100 milliseconds, resulting in The data lags behind, which brings great difficulties to time stamping the video data and audio data after encoding, and the problem of asynchronous playback of the sound and the picture during audio and video playback occurs.

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