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您好，为啥我的qsv解码播放 比cpu解码播放 画面延迟高些 是因为qsv有缓冲区吗 #2

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zhuya1996 opened this issue Oct 31, 2023 · 1 comment
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您好，为啥我的qsv解码播放 比cpu解码播放 画面延迟高些 是因为qsv有缓冲区吗 #2

zhuya1996 opened this issue Oct 31, 2023 · 1 comment

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@zhuya1996
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您好，为啥我的qsv解码播放 比cpu解码播放 画面延迟高些 是因为qsv有缓冲区吗
@waterfoxfox
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一个可能的原因是QSV解码后YUV从显存拷贝回内存这里存在瓶颈，这也是CPU占用率降不下来的原因。另外部分硬解码内部确实有缓存，在Android Media codec上体现更加明显，硬解缓存了至少1帧数据。

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@zhuya1996 @waterfoxfox