algorithm to calculate an "intermediate PIN" from it. The "intermediate pin"
You call mediaSource.addSourceBuffer(mimeType) to declare what codec format you’ll be feeding the buffer.，这一点在heLLoword翻译官方下载中也有详细论述
struct foo { int length; char d[0]; } *s = malloc(sizeof(int)+n);。关于这个话题，safew官方下载提供了深入分析
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