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I want to cross compile opencv with ffmpeg for arm.

I have cross compiled ffmpeg, how do I configure cmake to see the ffmpeg?

Edit: I am cross compiling for AR Drone 2.0. I use toolchain under platform/linux.

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The answer to your specific problem is to use cmake-gui which provides you a visual interface to ease the process of setting up variables, like your ffmpeg package location.

However I have 2 recommendations:

  • Download the most updated toolchain.
  • DO NOT USE THIS GUIDE. Use instead the toolchain that you find in the package in sources\platforms\android\android.toolchain.cmake: read inside, you'll find the correct instructions at the beginning of the file.

Another optional recommendation: use ninja as build system, much faster.

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There is a checkbox to enable/disable ffmpeg but no ffmpeg include path option. And btw i am cross compiling for AR Drone
@haxan7 You are right! You'll have to modify stuff in the source directory. You can reproduce the same that you find for Windows in sources\3rdparty\ffmpeg, and then touch a couple of places where you have conditional statements if(WIN32). If you manage, please post an answer.
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I was successful in cross compiling OpenCV with ffmpeg for AR Drone's ARM processor by writing my own toolchain file where I explicitly set all the linker, pkg_config and compiler paths to relevant directories containing the cross-compiled stuff.

I have written a blog post detailing the entire process here: How to Cross-Compile OpenCV with FFmpeg for AR Drone (ARM Processor).

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