VideoWriter OpenCV-无法在函数CvVideoWriter_GStreamer :: open中播放管道 [英] VideoWriter OpenCV - cannot put pipeline to play in function CvVideoWriter_GStreamer::open

问题描述

几乎完全相同的问题: OpenCV错误-无法在函数CvVideoWriter_GStreamer :: open

Almost exactly the same question : OpenCV error - cannot put pipeline to play in function CvVideoWriter_GStreamer::open

上下文:我正在尝试创建视频，并使用OpenCV 3.3.0和Python 2.7将其保存在.avi文件中.

Context : I'm trying to create a video and save it in a .avi file with OpenCV 3.3.0 and Python 2.7.

问题:此代码:

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

提高:

(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:如何解决此问题，以便可以使用OpenCV编写视频文件?

推荐答案

在 VideoWriter 的构造函数中不使用路径解决了该问题.

Not using a path in constructor of VideoWriter solved the problem.

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

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