Unverified80% confidenceTradeoffTime unknown
带硬件编码的采集卡能降低CPU占用但会引入额外延迟，追求实时监看应选免驱UVC直通卡而非硬编码卡
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80%
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Long-term
Relevance
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Unverified延迟越低通常需要硬件编码或PCIe直连，成本更高且便携性差；纯直播场景延迟不敏感，USB外置卡配直通口即可，无需为超低延迟买内置卡85% similarUnverified直播用途优先选USB接口采集卡，即插即用无需拆机；PCIe采集卡延迟更低（可低至个位数毫秒）但仅限台式机内置，适合对同步要求极高的多机位切换场景79% similarUnverified免驱（UVC协议）采集卡插上即用且跨系统兼容Windows/Mac/Linux，但通常不支持硬件编码，高分辨率下延迟和CPU占用更高；带专用驱动软件的卡延迟更低但兼容性差79% similarUnverified硬件编码卡（内置H.264/H.265芯片）能显著降低CPU占用，适合老旧电脑或边直播边玩游戏；纯软件（免驱）卡依赖电脑CPU编码，低配电脑易掉帧79% similarUnverified使用集成显卡(核显)或老旧显卡的电脑不建议用OBS软件x264编码录制，CPU占用会导致游戏严重掉帧，应优先用QuickSync/核显硬件编码78% similar
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