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You call mediaSource.addSourceBuffer(mimeType) to declare what codec format you’ll be feeding the buffer.，推荐阅读safew官方下载获取更多信息
let messageMemoryView = new UInt8Array(。关于这个话题，51吃瓜提供了深入分析
71.7 x 149.6 x 7.2 mm
Chris Damant/Bernwood Ecology