在 Emgu Cv 中写入视频时出错
我正在尝试使用 Emgu CV 录制从网络摄像头捕获的视频，但出现异常。
_capture = new Capture(0);
_capture.QueryFrame();
captureOutput = new VideoWriter(@"output.avi",
(int)_capture.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FOURCC),
(int)_capture.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FPS),
(int)_capture.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FRAME_WIDTH),
(int)_capture.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FRAME_HEIGHT),
true);
Image<Bgr, Byte> frame = _capture.QueryFrame();
captureOutput.WriteFrame(frame);
我收到“尝试除以零”。当我执行 captureOutput.WriteFrame(frame) 行时出现异常。
I am trying to record a video captured from a webcam using Emgu CV but I a, getting an exception.
_capture = new Capture(0);
_capture.QueryFrame();
captureOutput = new VideoWriter(@"output.avi",
(int)_capture.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FOURCC),
(int)_capture.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FPS),
(int)_capture.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FRAME_WIDTH),
(int)_capture.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FRAME_HEIGHT),
true);
Image<Bgr, Byte> frame = _capture.QueryFrame();
captureOutput.WriteFrame(frame);
I am getting an "Attempted to divide by zero." exception when I am executing captureOutput.WriteFrame(frame) line.
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引用评论：
问题在于选择正确的编解码器进行录制。我将下面第 3 行的部分内容更改
为 -1：
_capture.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FOURCC)。这为我提供了一个对话框，其中包含我的计算机上可用的编解码器列表。我选择了“未压缩”编解码器，视频已正确生成。
Cite from Comment:
The issue was with the selecting the proper codec to record. I changed part of line 3 below:
_capture.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FOURCC)with -1.This provided me with a dialog box with the list of codec available on my machine. I selected "Uncompressed" codec and the video was properly generated.