多相机硬触发同步，时间戳的数值是否可以直接对应
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用python多进程为每个相机分别subprocess运行v4l2-ctl命令行然后读取--stream-mmap --verbose的时间戳，这个时间戳的数值在不同相机之间是一致的吗（就是说直接找时间戳最接近的即为同步帧）？还是每个相机的计时器有不同的起始点？
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@etherealhorizon 请问你使用的是哪款相机？怎样触发的同步帧？
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@veye_xumm IMX287，使用外部的信号输入ADP-N4触发同步
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@etherealhorizon 使用 v4l2-ctl --stream-mmap --verbose 时，时间戳反映了数据从相机传输到内存缓冲区的时间点。因此，它显示的是捕获帧的实际时间，是相机传输到主机的时刻。可以用时间很接近的两帧判断其为同步帧。
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@veye_xumm 好的，感谢
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