python - OpenCV - 抑制、隐藏或禁用输出到屏幕的错误或警告消息

Question

我想知道是否有办法抑制、隐藏或禁用从 OpenCV 输出到屏幕的错误或警告消息，我认为源自 cap.read()？

我认为它们来自使用 FFMpeg 的 OpenCV，它们要么显示如下：

情况1：

[mpeg2video @ 0x3430c00] Invalid frame dimensions 0x0.
[mpeg2video @ 0x3430c00] Invalid frame dimensions 0x0.
[mpeg2video @ 0x3430c00] Invalid frame dimensions 0x0.
[mpeg2video @ 0x3430c00] Invalid frame dimensions 0x0.
[mpeg2video @ 0x3430c00] Invalid frame dimensions 0x0.
[mpeg2video @ 0x3430c00] Invalid frame dimensions 0x0.
[mpeg2video @ 0x3430c00] Invalid frame dimensions 0x0.
[mpeg2video @ 0x3430c00] Invalid frame dimensions 0x0.
[mpeg2video @ 0x3430c00] Invalid frame dimensions 0x0.
[mpeg2video @ 0x3430c00] Invalid frame dimensions 0x0.

或者

案例二：

...
[h264 @ 0x29e5a40] co located POCs unavailable
[h264 @ 0x2a6c3c0] co located POCs unavailable
[h264 @ 0x29d7b80] reference picture missing during reorder
[h264 @ 0x29d7b80] Missing reference picture, default is 65656
[h264 @ 0x298da80] mmco: unref short failure
[h264 @ 0x298da80] number of reference frames (0+6) exceeds max (5; probably corrupt input), discarding one
[h264 @ 0x29dc700] reference picture missing during reorder
[h264 @ 0x29dc700] Missing reference picture, default is 65672
[h264 @ 0x2a27180] mmco: unref short failure
[h264 @ 0x2af7680] co located POCs unavailable
[h264 @ 0x29e5a40] mmco: unref short failure
[h264 @ 0x29e5a40] number of reference frames (0+6) exceeds max (5; probably corrupt input), discarding one
[h264 @ 0x2af9040] mmco: unref short failure

据我了解，案例 1 是一个已知问题，因为它正在寻找 PES 标头。在找到标头之前，只有少数这些消息。

我不明白CASE 2，我不知道发生了什么，但似乎阅读了@frame 的图像。有许多这样的消息输出到控制台窗口并增加了处理时间。

标签： pythonopencvffmpeg