Unverified85% confidenceDecision RuleTime unknown

USB采集卡因UVC协议和USB带宽限制，通常存在60-100ms采集延迟，不适合边看采集画面边操作；PCIe内置卡延迟可低至十几ms，主播看采集画面打游戏应选PCIe卡

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视频采集卡category

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UnverifiedUVC免驱采集设备(遵循USB Video Class)在延迟上通常有80-150ms，直播互动可接受但不适合需要即时反馈的操作类游戏录制，硬件PCIe内置卡延迟可低至个位数毫秒85% similar Unverified廉价USB采集卡（几十元级别的HDMI转USB棒）多为USB2.0且实际采集1080p会被降到30fps并有明显压缩失真，仅适合会议/教学视频采集，不适合游戏直播77% similar

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