Newest 'ffmpeg' Questions - Stack Overflow

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  • How can I simulate ffmpeg's empty_moov option within code ?

    22 février 2014, par mczarnek

    Command-line ffmpeg has the ability to use an empty moov_atom at the beginning of a file.

    More info: http://www.ffmpeg.org/ffmpeg-formats.html#Options-3

    I would like to do the same thing, except within code. Anyone know how?

  • How to stream video using ffmpeg

    21 février 2014, par Nedeljko

    I am very stupid and can not solve problem using google.

    I need the command line for windows to start ffmpeg to read raw data video in yuv420 format in local y4m file, encode it as x264 and send it as stream over network. Then I must be able to play this stream via VLC player.

    Also, I need solution for C++ which receives yuv420 stream from somewhere and send it to local ffmpeg application to encode it as x264 and send it via network as stream.

    Thanx a lot.

  • How to extract an Image from a video file in qt ?

    21 février 2014, par Wagmare

    I want to extract an image (First frame) form a video file in qt. I used ffmpeg application to extract a frame, it gives extact result what I need, but ffmpeg is a seperate application, which overloads process. So I want to make it as static linking. Is it possible make static link to ffmpeg , is there is any statick library available for extracting frame from video or are there any other ways to extract frame from video? I dont want to use Qt phonon, because it physically opens a phonon dialog and then take a scrrenshot. I want the extracting process should happenin background.

    Thanks in Advance

  • Error while building ParaView on ubuntu

    21 février 2014, par user3337492

    I´ve got school project that I have to build ParaView and work with it in parallel.

    I am using this guide: http://paraview.org/Wiki/ParaView:Build_And_Install

    I´ve installed all the required packages and now it is time to "Configure ParaView With CMake".

    When I do this recomended code

    mkdir $HOME/projects/ParaView-bin

    cd $HOME/projects/ParaView-bin

    ccmake $HOME/projects/ParaView3

    the terminal shows this:

    CMake Error: The source "/home/kulis/projects/ParaView3/CMakeLists.txt" does not match the source "/home/kulis/projects/ParaView/CMakeLists.txt" used to generate cache. Re-run cmake with a different source directory.

    so instead of ParaView3 I use ParaView in code: ccmake $HOME/projects/ParaView

    then its possible to set all the variables and compile. But there comes the real problem. When i want to compile it, the terminal shows this error message:

    ERROR ADD_PARAVIEW_VIEW_MODULE called without VIEW_TYPE or VIEW_XML_GROUP

    CMake Error: The following variables are used in this project, but they are set to NOTFOUND. Please set them or make sure they are set and tested correctly in the CMake files: /home/kulis/projects/ParaView/VTK/IO/FFMPEG/FFMPEG_INCLUDE_DIR used as include directory in directory /home/kulis/projects/ParaView/VTK/IO/FFMPEG FFMPEG_avcodec_LIBRARY (ADVANCED) linked by target "vtkIOFFMPEG" in directory /home/kulis/projects/ParaView/VTK/IO/FFMPEG FFMPEG_avformat_LIBRARY (ADVANCED) linked by target "vtkIOFFMPEG" in directory /home/kulis/projects/ParaView/VTK/IO/FFMPEG FFMPEG_avutil_LIBRARY (ADVANCED) linked by target "vtkIOFFMPEG" in directory /home/kulis/projects/ParaView/VTK/IO/FFMPEG FFMPEG_swscale_LIBRARY (ADVANCED) linked by target "vtkIOFFMPEG" in directory /home/kulis/projects/ParaView/VTK/IO/FFMPEG

    And I do not really know what to do with it.

    I would very much appreciate your help. Thanks

  • publish chromium rendered view to ffmpeg/libav

    21 février 2014, par user3337537

    I would like to publish chromium rendered view to ffmpeg/libav stream instead of showing it on the operating window system. Also plugins like flash should be included in the stream. I don't know much about chromium rendering yet.

    I know there are command like "ffmpeg -f x11grab -s 1280x720" ... But i would like to do this right from chrome to publish mutliple tabs at the same time.

    How would you estimate the development effort for that?