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  • OpenCV won't open some videos of many videos of the same format

    2 octobre 2013, par OpenMinded

    I am using Visual Studio 2012 with OpenCV 2.4.6.

    I have 4 videos that I recorded one by one with my Nokia Lumia 920. OpenCV won't open .mp4 format from my phone by the default. So I converted all these 4 videos using Sony Vegas to .mp4 with the SAME preferences for all of them. Now the problem is that OpenCV has a problem to open two of them. The other two works like a charm with no problem. Below is the information about codec that I used (Yes, it is the same for all videos) :

    Codec info

    And this is the error :

    Error

    Why is it so that they are the same type but only a few of them are loaded properly ?

  • ffmpeg build with msys2 + VS2017 hang

    20 décembre 2019, par lucky1928

    I am using windows10 + MSVC2017 Community + MSYS2 to build ffmpeg 4.0.1 with below steps :

    1. Start a Visual Studio 2017 "Developer Command Prompt"

    2. cd into msys64 directory, and then invoke MSYS2

      msys2_shell.cmd -msys2 -use-full-path

    3. In MSYS2 shell, cd into ffmpeg build directory.

    4. run ffmpeg config command :

      ./configure --prefix=./install --toolchain=msvc

    After press enter with above command line,sounds like it hang there forever.
    never print anything out and not exit as well.

  • Want to use ffmpeg build library files in WIndows phone 8.1

    7 juillet 2016, par bharat aghera

    I have created the build of FFMpeg library for windows phone 8.1 simulator using the given steps from .
    It has created three folders such as bin, include and lib. "bin" contains the .dll and .lib file. "include" contains the header files. "lib" contains the .def file.

    Now I want to use this library file in windows phone 8.1 application. But I didn’t get how can I use it using visual studio 2015 in my project ?

    I have checked out the FFMpegIntrop project. But I want to call the single function of the ffmpeg library avcodec_register_all(),avcodec_find_decoder(CODEC_ID_H264) .

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