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Sur d’autres sites (7322)

  • ffmpeg adds 200 seconds of silence

    1er octobre 2022, par AncientToaster

    I'm using ffmpeg's concat option to combine a series of still images with an mp3 file. The total duration of my input.txt file is 12532 seconds, which is exactly the same as the total duration of my mp3 file (3:28:52, or 12532 seconds).

    


    But ffmpeg is adding 200 seconds of audio-free content to the end of the video. I've tried totaling and re-totaling the total duration of input.txt and it all seems to add up to the same amount. Including or excluding the -shortest flag also doesn't seem to matter.

    


      


    • ffmpeg command :

      


      ffmpeg -f concat -i input.txt -i input.mp3 -shortest -c:v libx264 -r 1 -pix_fmt yuv420p output.mp4


      


      • 


    • input.txt source

      


      • 


    • input.mp3

      


      • 


    • output file

      


      • 


    


  • Application using FFMPEG Library does not compile with CMAKE error avformat_alloc_context but I have imported the header files and libray

    23 mai 2022, par Clockman

    I compiled the FFMPEG source file myself and got the header and library files in an include and bin folder respectively, the target platform is Windows 10. I also setup my cmakelist.txt to find and include both the library and header files. The application finds the path or so it seems because during compilation I get a "LNK2019 error unresolved external symbol avformat_alloc_context referenced in function main". Below is an extract from my cmake list ; I will like to note that I got the .lib and .dll versions of the library hence the approach below based on the book "professional cmake" and other stackflow examples.

    


    ProjectDir/AudMan/cmakelist.txt

    


    list(APPEND CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH};PATH-TO-INCLUDES;PATH-TO-LIBRARY)
find_path(AVFORMAT_INCLUDE_DIR libavformat/avformat.h)
find_library(AVFORMAT_LIBRARY avformat)
add_library(ffmpegHeaders INTERFACE)
target_include_directories(ffmpegHeaders INTERFACE ${AVFORMAT_INCLUDE_DIR})


    


    ProjectDir/cmakelist.txt

    


    set(Rapid_Prefix PATH-TO-LIBRARY)
    add_library(AVformat SHARED IMPORTED)
    set_target_properties(AVformat PROPERTIES IMPORTED_LOCATION ${Rapid_Prefix}/avformat-59.dll IMPORTED_IMPLIB ${AVFORMAT_LIBRARY})
target_link_libraries(App_target PRIVATE AVformat)


    


    A sample of the codes is this

    


    extern "C" {&#xA;#include <libavcodec></libavcodec>avcodec.h>&#xA;#include <libavformat></libavformat>avformat.h>&#xA;}&#xA;&#xA;int main()&#xA;{&#xA;    AVFormatContext* format = avformat_alloc_context();&#xA;    if (avformat_open_input(&amp;format, R"(\test.m4a)", NULL, NULL) != 0) {&#xA;        fprintf(stderr, "Could not open file &#x27;%s&#x27;\n", R"(\test.m4a)");&#xA;        return -1;&#xA;    }&#xA;    if (avformat_find_stream_info(format, NULL) &lt; 0) {&#xA;        fprintf(stderr, "Could not retrieve stream info from file &#x27;%s&#x27;\n", R"(test.m4a)");&#xA;        return -1;&#xA;    }&#xA;    return 0;&#xA;}&#xA;

    &#xA;

    I have been at it for about five days and will appreciate any help I can get.

    &#xA;

  • MAINTAINERS : Add Haihao Xiang for vaapi

    14 décembre 2021, par U. Artie Eoff
    MAINTAINERS : Add Haihao Xiang for vaapi

    Current listed maintainers for vaapi plugin are
    
not reponsive and/or currently active in the
    
ffmpeg community.  Thus, vaapi plugin patches
    
(and qsv plugin) have generally gone ignored or
    
lost in the ether for too long.
    

    Remove Gwenole Beauchesne from vaapi maintainer
    
who has not been active since 2016.
    

    Current alternative maintainer for vaapi is Mark
    
Thompson whom has not been active since
    
March/April 2021.
    

    Therefore, add Haihao Xiang to vaapi maintainer
    
who's primary role is FFmpeg development with a
    
focus on the vaapi and qsv plugins.  Haihao has
    
over a decade of media experience and many years
    
of FFmpeg development experience, amongst other
    
media frameworks.
    

    The additional patch for adding Haihao as qsv
    
plugin maintainer has been submitted previously :
    

    https://patchwork.ffmpeg.org/project/ffmpeg/patch/20210608141134.27448-1-zhongli_dev@126.com/
    

    This will help FFmpeg to continue to be the leading
    
multimedia framework by allowing these plugins to be
    
actively improved, enhanced, and maintained for existing
    
and future HW platforms.
    

    Signed-off-by : U. Artie Eoff <ullysses.a.eoff@intel.com>
    • [DH] MAINTAINERS

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