OpenCV 4.2 with Python3.8 and video support (FFMPEG, GStreamer, gPhoto2) based on Alpine Linux 3.10
Home Page: https://hub.docker.com/r/czentye/opencv-video-minimal/
License: MIT License
Hello,
Please when I try to use your image as base image for my build, my python version is downgraded from 3.8 to 3.7.5 as shown below. I have later gotten to understand, its because of the fact 3.8 is from alpine 3.11 but this image uses 3.10. I really want to test out 3.8, but not sure how to get to it.
(1/47) Downgrading libcrypto1.1 (1.1.1d-r3 -> 1.1.1d-r2)
(2/47) Installing ca-certificates (20190108-r0)
(3/47) Installing nghttp2-libs (1.39.2-r0)
(4/47) Downgrading libssl1.1 (1.1.1d-r3 -> 1.1.1d-r2)
(5/47) Downgrading zlib (1.2.11-r3 -> 1.2.11-r1)
(6/47) Installing libcurl (7.66.0-r0)
(7/47) Installing curl (7.66.0-r0)
(8/47) Downgrading python3 (3.8.1-r0 -> 3.7.5-r1)
I then attempted to rebuild myself using alpine 3.11, but I get the errors below:
ERROR: unsatisfiable constraints:
jasper-dev (missing):
required by: world[jasper-dev]
jasper-libs (missing):
required by: world[jasper-libs]
Any help will be very much appreciated
EDIT: Apparently just found out it seems jasper-dev is not available for 3.11. This is correct?
Kind regards
Hello,
Thanks again for your file. I have been using it for a while, and recently tried to rebuild it again. ALl of a sudden I get the below
(131/139) Upgrading libgfortran (8.3.0-r0 -> 9.2.0-r6)
(132/139) Upgrading gfortran (8.3.0-r0 -> 9.2.0-r6)
(133/139) Upgrading tiff (4.0.10-r3 -> 4.1.0-r0)
(134/139) Upgrading libtiffxx (4.0.10-r3 -> 4.1.0-r0)
(135/139) Upgrading tiff-dev (4.0.10-r3 -> 4.1.0-r0)
(136/139) Installing libidn2 (2.3.0-r0)
(137/139) Upgrading wget (1.20.3-r0 -> 1.20.3-r1)
(138/139) Purging mpfr3 (3.1.5-r1)
(139/139) Purging llvm8-libs (8.0.0-r1)
Executing busybox-1.31.1-r13.trigger
Executing ca-certificates-20191127-r2.trigger
Executing glib-2.64.1-r0.trigger
No schema files found: doing nothing.
OK: 970 MiB in 193 packages
'/usr/local/bin/python' -> '/usr/bin/python3'
'/usr/local/bin/pip' -> '/usr/bin/pip3'
'/usr/include/libpng' -> '/usr/include/libpng16'
'/usr/include/xlocale.h' -> '/usr/include/locale.h'
/bin/sh: pip3: not found
The command '/bin/sh -c apk add --update --no-cache build-base clang clang-dev cmake pkgconf wget openblas openblas-dev linux-headers libjpeg-turbo libjpeg-turbo-dev libpng libpng-dev libwebp libwebp-dev tiff tiff-dev jasper-libs jasper-dev openexr openexr-dev ffmpeg-libs ffmpeg-dev libavc1394 libavc1394-dev gstreamer gstreamer-dev gst-plugins-base gst-plugins-base-dev libgphoto2 libgphoto2-dev && apk add --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing --update --no-cache libtbb libtbb-dev && apk add --repository http://dl-cdn.alpinelinux.org/alpine/edge/main --update --no-cache python3 python3-dev && apk upgrade --repository http://dl-cdn.alpinelinux.org/alpine/edge/main musl && ln -vfs /usr/bin/python3 /usr/local/bin/python && ln -vfs /usr/bin/pip3 /usr/local/bin/pip && ln -vfs /usr/include/libpng16 /usr/include/libpng && ln -vfs /usr/include/locale.h /usr/include/xlocale.h && pip3 install -v --no-cache-dir --upgrade pip && pip3 install -v --no-cache-dir numpy && cd /tmp && wget https://github.com/opencv/opencv/archive/$OPENCV_VERSION.tar.gz && tar -xvzf $OPENCV_VERSION.tar.gz && rm -vrf $OPENCV_VERSION.tar.gz && mkdir -vp /tmp/opencv-$OPENCV_VERSION/build && cd /tmp/opencv-$OPENCV_VERSION/build && cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_C_COMPILER=/usr/bin/clang -D CMAKE_CXX_COMPILER=/usr/bin/clang++ -D CMAKE_INSTALL_PREFIX=/usr -D INSTALL_PYTHON_EXAMPLES=NO -D INSTALL_C_EXAMPLES=NO -D WITH_IPP=NO -D WITH_1394=NO -D WITH_LIBV4L=NO -D WITH_V4l=YES -D WITH_TBB=YES -D WITH_FFMPEG=YES -D WITH_GPHOTO2=YES -D WITH_GSTREAMER=YES -D BUILD_DOCS=NO -D BUILD_TESTS=NO -D BUILD_PERF_TESTS=NO -D BUILD_EXAMPLES=NO -D BUILD_opencv_java=NO -D BUILD_opencv_python2=NO -D BUILD_ANDROID_EXAMPLES=NO -D PYTHON3_LIBRARY=`find /usr -name libpython3.so` -D PYTHON_EXECUTABLE=`which python3` -D PYTHON3_EXECUTABLE=`which python3` -D BUILD_opencv_python3=YES .. && make -j`grep -c '^processor' /proc/cpuinfo` && make install && cd / && rm -vrf /tmp/opencv-$OPENCV_VERSION && apk del --purge build-base clang clang-dev cmake pkgconf wget openblas-dev openexr-dev gstreamer-dev gst-plugins-base-dev libgphoto2-dev libtbb-dev libjpeg-turbo-dev libpng-dev tiff-dev jasper-dev ffmpeg-dev libavc1394-dev python3-dev && rm -vrf /var/cache/apk/*' returned a non-zero code: 127
Will be gracious if you could point me in the right direction on how to fix this please.
Kind regards
Hello @czeni,
Thanks for this and it builds fine. But please is it possible for me to build based on python 3.7.5 instead of 3.8?
Thanks
~ # python3
Error relocating /usr/lib/libpython3.8.so.1.0: copy_file_range: symbol not found
Python 3.8 only exists in edge and does not exist in Alpine 3.10.
My guess is that you are using alpine:3.10 which is using py3.7 but you are also pulling py-numpy py-numpy-dev from community branch which are built against py3.8, which in turn could/would cause problems in the whole setup.
As of the latest relase the cv2 module is missing from the container.
Python 3.7.5 (default, Oct 17 2019, 12:25:15)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'cv2'
Some programs like ffmpeg and gocv (Golang bindings for OpenCV) cannot work without pkgconfig properly configured for OpenCV.
In recent versions of OpenCV 4.x this is not generated by default.
More info at opencv/opencv#13154
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