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I get the following error when I try to initialise a videocapture with a url:

cv::VideoCapture cap = cv::VideoCapture( "http://www.example.com/vid"  );

error:

VIDEOIO ERROR: V4L: device http://www.example.com/vid: Unable to query number of channels

There is nothing wrong with the videofile or access rights.

I recently recompiled ffmpeg with extra libs, and opencv 3.2 on ubuntu xenial.

I get the following error when I try to initialise a videocapture with a url:

cv::VideoCapture cap = cv::VideoCapture( "http://www.example.com/vid"  );

error:

VIDEOIO ERROR: V4L: device http://www.example.com/vid: Unable to query number of channels

There is nothing wrong with the videofile or access rights.

I recently recompiled ffmpeg with extra libs, and opencv 3.2 on ubuntu xenial.xenial, with the following configs:

ffmpeg

./configure --enable-gpl --enable-version3 --enable-nonfree --enable-libmfx --enable-runtime-cpudetect --enable-gray --enable-vaapi --enable-vdpau --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libfdk-aac --enable-libtheora --enable-libvpx --enable-libwebp --enable-x11grab --cpu=native --enable-vaapi --enable-vdpau --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libwavpack --enable-libxvid --enable-libx264 --enable-libx265 --enable-openssl --enable-nvenc --enable-cuda --enable-omx --enable-libv4l2

opencv 3.2

cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_EXTRA_MODULES_PATH=/home/victor/Downloads/opencv_contrib/modules/ -DWITH_LIBV4L=ON -DWITH_CLP=ON -DWITH_VA_INTEL=ON -DWITH_VA=ON ..

Could it be that I compiled opencv with VA?

I get the following error when I try to initialise a videocapture with a url:

cv::VideoCapture cap = cv::VideoCapture( "http://www.example.com/vid"  );

error:

VIDEOIO ERROR: V4L: device http://www.example.com/vid: Unable to query number of channels

There is nothing wrong with the videofile or access rights.

I recently recompiled ffmpeg with extra libs, and opencv 3.2 on ubuntu xenial, with the following configs:

ffmpeg

./configure --enable-gpl --enable-version3 --enable-nonfree --enable-libmfx --enable-runtime-cpudetect --enable-gray --enable-vaapi --enable-vdpau --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libfdk-aac --enable-libtheora --enable-libvpx --enable-libwebp --enable-x11grab --cpu=native --enable-vaapi --enable-vdpau --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libwavpack --enable-libxvid --enable-libx264 --enable-libx265 --enable-openssl --enable-nvenc --enable-cuda --enable-omx --enable-libv4l2

opencv 3.2

cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_EXTRA_MODULES_PATH=/home/victor/Downloads/opencv_contrib/modules/ -DWITH_LIBV4L=ON -DWITH_CLP=ON -DWITH_OPENCL=ON -DWITH_VA_INTEL=ON -DWITH_VA=ON ..

Could it be that I compiled opencv with VA?VAor opencl?

I get the following error when I try to initialise a videocapture with a url:

cv::VideoCapture cap = cv::VideoCapture( "http://www.example.com/vid"  );

error:

VIDEOIO ERROR: V4L: device http://www.example.com/vid: Unable to query number of channels

There is nothing wrong with the videofile or access rights.

I recently recompiled ffmpeg with extra libs, and opencv 3.2 on ubuntu xenial, with the following configs:

ffmpeg

./configure --enable-gpl --enable-version3 --enable-nonfree --enable-libmfx --enable-runtime-cpudetect --enable-gray --enable-vaapi --enable-vdpau --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libfdk-aac --enable-libtheora --enable-libvpx --enable-libwebp --enable-x11grab --cpu=native --enable-vaapi --enable-vdpau --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libwavpack --enable-libxvid --enable-libx264 --enable-libx265 --enable-openssl --enable-nvenc --enable-cuda --enable-omx --enable-libv4l2

opencv 3.2

cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_EXTRA_MODULES_PATH=/home/victor/Downloads/opencv_contrib/modules/ -DWITH_LIBV4L=ON -DWITH_CLP=ON -DWITH_OPENCL=ON -DWITH_VA_INTEL=ON -DWITH_VA=ON ..

Could it be that I compiled opencv with VAor opencl?

I get the following error when I try to initialise a videocapture with a url:

cv::VideoCapture cap = cv::VideoCapture( "http://www.example.com/vid"  );

error:

VIDEOIO ERROR: V4L: device http://www.example.com/vid: Unable to query number of channels

There is nothing wrong with the videofile or access rights.

I recently recompiled ffmpeg with extra libs, and opencv 3.2 on ubuntu xenial, with the following configs:

ffmpeg

./configure --enable-gpl --enable-version3 --enable-nonfree --enable-libmfx --enable-runtime-cpudetect --enable-gray --enable-vaapi --enable-vdpau --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libfdk-aac --enable-libtheora --enable-libvpx --enable-libwebp --enable-x11grab --cpu=native --enable-vaapi --enable-vdpau --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libwavpack --enable-libxvid --enable-libx264 --enable-libx265 --enable-openssl --enable-nvenc --enable-cuda --enable-omx --enable-libv4l2

opencv 3.2

cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local -DWITH_LIBV4L=ON -DWITH_CLP=ON -DWITH_OPENCL=ON -DWITH_VA_INTEL=ON -DWITH_VA=ON ..

Could it be that I compiled opencv with VAor opencl?

cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local -DWITH_LIBV4L=ON -DWITH_CLP=ON ..