OpenCV Cross Compile Issue for ARM with FFMPEG support on x86 host
I am trying to compile OpenCV with ffmpeg support for ARM Platform on a x86 host.
I downloaded and compiled ffmpeg for arm platform (both static - FFMPEG_ARM_LIB and dynamic libs - FFMPEG_ARM_LIB_SO)
When I run cmake in opencv, it gives the following -
-- Video I/O:
--DC1394 1.x: NO
-- DC1394 2.x: NO
-- FFMPEG: NO
-- codec: NO
-- format: NO
-- util: NO
-- swscale: NO
-- gentoo-style: YES
-- GStreamer: NO
-- OpenNI: NO
-- OpenNI PrimeSensor Modules: NO
-- PvAPI: NO
-- GigEVisionSDK: NO
-- UniCap: NO
-- UniCap ucil: NO
-- V4L/V4L2: NO/YES
-- XIMEA: NO
-- Xine: NO
I changed the following flags to point to the lib paths of both ffmpeg static and dynamic libs-
LD_LIBRARY_PATH
C_INCLUDE_PATH
CPLUS_INCLUDE_PATH
PKG_CONFIG_PATH
PKG_CONFIG_LIBDIR
PATH
CMAKE_LIBRARY_PATH
CMAKE_INCLUDE_PATH
However, the opencv is still not able to recognize the ffmpeg libs.
My FFMPEG compilation command was
./configure --enable-shared --disable-static\ --cross-prefix=arm-linux-gnueabi- --arch=armv7a\ --target-os=linux --prefix=<path>
What am I doing wrong here? 1. Am I compiling the ffmpeg with the wrong option? 2. Am I missing some element in CMake which would make it point to the compiled ffmpeg lib for ARM on my system?
Host Arch - x86 64 Target Arch - ARM 32 bit
Did you try adding -DWITH_FFMPEG=ON to your cmake command?
Yup. I did that. But it still did not detect the ffmpeg files.
When running CMAKE-GUI can you check if it retrieves the ffmpeg libs location?
I used this to print out where the libs are message(STATUS "CMAKE_LIBRARY_PATH is " ${CMAKE_LIBRARY_PATH}) message(STATUS "CMAKE_INCLUDE_PATH is " ${CMAKE_INCLUDE_PATH}) message(STATUS "PKG_CONFIG_PATH is " $ENV{PKG_CONFIG_PATH})
It does point to the ffmpeg cross compiled lib path.