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目前的可视对讲系统,无论模拟或是数字系统对于音视频通话功能有以下问题:通话音视频没有存留,或只是截取通话过程中的一张照片。这在根本上影响着可视对讲系统的安全性以及事后的问题追溯性。究其原因,主要是原始音视频流数据量太大,影响传输和存储。基于此,本文提出了利用ffmpeg对可视对讲通话的音视频数据进行压缩并存储,经实验验证:1min的640X480的视频数据经压缩存储后只占约10M的空间,是原始音视频数据的约1/40,且ffmpeg压缩存储并没有增加可视对讲系统的运行负担。压缩后的视频文件有利于向主控管理中心进行传输备份,提高了可视对讲系统的安全性,便于事后的问题追溯。
Current video intercom systems, whether analogue or digital, have the following problems with audio-video calling features: No audio or video on call, or just a photo taken during a call. This fundamentally affects the safety of video intercom systems and retrospective problem-solving. The reason is mainly the amount of raw audio and video streaming data is too large, affecting the transmission and storage. Based on this, this paper proposes the use of ffmpeg on video intercom call audio and video data compression and storage, the experimental verification: 1min 640X480 video data compressed storage only occupies about 10M of space is the original audio and video data About 1/40, and ffmpeg compression storage does not increase the operational burden of video intercom system. The compressed video file is conducive to the master management center for transmission backup, improve the safety of video intercom system, easy to trace the problems afterwards.