I use following GStreamer pipeline with VideoCapture class.
filesrc location=video.webm ! matroskademux ! vp9dec ! videoconvert ! appsink
Now VideoCapture::get(cv::CAP_PROP_FRAME_COUNT) returns the correct frame count, but when reading frames in loop with VideoCapture::read, less frames are got before EOF (return value false).
I know that problem is in OpenCV appsink, but is there a solution?
I've tried:
videoCapture.set(CV_CAP_GSTREAMER_QUEUE_LENGTH, queue_length);
but I get error message:
(VideoProcessorTest:3673): Gtk-WARNING **: Locale not supported by C library.
Using the fallback 'C' locale.
GStreamer Plugin: Embedded video playback halted; module matroskademux1 reported: Internal data stream error.
OpenCV Error: Unspecified error (GStreamer: unable to start pipeline
) in icvStartPipeline, file /home/test/opencv-3.2.0/modules/videoio/src/cap_gstreamer.cpp, line 407
terminate called after throwing an instance of 'cv::Exception'
what(): /home/test/opencv-3.2.0/modules/videoio/src/cap_gstreamer.cpp:407: error: (-2) GStreamer: unable to start pipeline
in function icvStartPipeline
Asked: 2017-07-31 04:15:15 -0600
Seen: 895 times
Last updated: Aug 02 '17