VideoWriter OpenCV -不能让管道在CvVideoWriter_GStreamer::open函数中发挥作用

Question

几乎完全相同的问题：GStreamer::open

上下文:我正在尝试创建一个视频，并使用.avi 3.3.0和Python2.7将其保存在一个OpenCV文件中。

问题:此代码：

fourcc = cv2.VideoWriter_fourcc(*'XVID')
out = cv2.VideoWriter('data/out/output.avi', fourcc, 30, (800, 600))

提出：

(python2.7:12345): GStreamer-CRITICAL **: gst_element_make_from_uri: assertion 'gst_uri_is_valid (uri)' failed

** (python2.7:12345): CRITICAL **: gst_ffmpeg_cfg_set_property: assertion 'qdata->size == sizeof (gint64)' failed 
OpenCV Error: Unspecified error (GStreamer: cannot put pipeline to play ) in CvVideoWriter_GStreamer::open, file /soft/OpenCV3.3/opencv-3.3.0/modules/videoio/src/cap_gstreamer.cpp, line 1690
VIDEOIO(cvCreateVideoWriter_GStreamer (filename, fourcc, fps, frameSize, is_color)): raised OpenCV exception:

cap_gstreamer.cpp:1690: error: (-2) GStreamer: cannot put pipeline to play
 in function CvVideoWriter_GStreamer::open

问题：如何解决这个问题，这样我就可以用OpenCV ?编写视频文件。

Answer 1

在VideoWriter的构造函数中不使用路径解决了这个问题。

out = cv2.VideoWriter('output.avi', fourcc, 30, (800, 600))