python - python上的Opencv错误

Question

无论我使用什么 "CV_FOURCC" 我都会得到这个:

OpenCV Error: Unsupported format or combination of formats (Gstreamer Opencv backend doesn't support this codec acutally.) in CvVideoWriter_GStreamer::open, file /usr/src/packages/BUILD/OpenCV-2.2.0/modules/highgui/src/cap_gstreamer.cpp, line 489

writer = cv.CreateVideoWriter(
         filename=file,
         fourcc=cv.CV_FOURCC('F', 'M', 'P', '4') ,
         fps=iFps,
         frame_size=(800,600),
         is_color=1)
cv.WriteFrame(writer, cv.LoadImage(frames[i]))

还有/usr/src/packages/BUILD/OpenCV-2.2.0/modules/highgui/src/cap_gstreamer.cpp，不存在。

同时 CV_FOURCC('H','F','Y','U') 生成空文件。

输入为*.png，输出为*.avi

详细信息:Opensuse 10.4、OpenCv 2.2.0

编辑:如果我这样做，它会创建一个有效的 AVI 文件:

writer = cv.CreateVideoWriter(
         filename=file,
         fourcc=cv.CV_FOURCC('F', 'M', 'P', '4') ,
         fps=iFps,
         frame_size=(800,600),
         is_color=1)
cv.WriteFrame(writer, cv.LoadImage(frames[i]))
del writer # this makes a working AVI

Answer 1

如果我这样做，它会创建一个有效的 AVI 文件:

writer = cv.CreateVideoWriter(
         filename=file,
         fourcc=cv.CV_FOURCC('F', 'M', 'P', '4') ,
         fps=iFps,
         frame_size=(800,600),
         is_color=1)
cv.WriteFrame(writer, cv.LoadImage(frames[i]))
del writer # this makes a working AVI