The V3 approach obliterates this race condition by hooking addSourceBuffer at the MediaSource.prototype level, I intercept the creation of every SourceBuffer. The moment a buffer is created and returned, I immediately install a hooked appendBuffer directly on that specific instance; before any page code can even see the instance, let alone cache a reference to its methods. The hooked appendBuffer is installed as an own property of the instance, which takes precedence over the prototype chain. There is no window for fermaw to cache the original. The hook is always first.
FT App on Android & iOS。关于这个话题，safew官方版本下载提供了深入分析
if (n <= 1) return n;。关于这个话题，搜狗输入法2026提供了深入分析
Credit: Samsung
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