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• Ways to inject Spatial Meta Data into video with Java

  29 juin 2017, par user5839

  I’m trying to inject Spacial meta data into 360 video so it runs on Youtube/Facebook etc - using video that is cut on a Java server with FFMPEG and will run on a Linux AWS EC2 Instance.

  I’ve tried to use this library
  https://github.com/pedroSG94/metadata-spherical-injector

  Which is for Android and seems to wrap this .so library
  https://github.com/pedroSG94/metadata-spherical-injector/tree/master/metadatavideo/src/main/libs/x86

  with this script
  https://github.com/pedroSG94/metadata-spherical-injector/blob/master/metadatavideo/src/main/java/com/pedro/metadatavideo/VideoInjector.java

  I have no idea how to get this running on a Java server, or if it’s possible. Can anyone let me know if this is going to work or if I need to find another way of injecting the meta data ?

  Can FFMPEG do it ?

• FFMpeg how to use tee option with multiple ouput

  19 mai 2021, par Guy B

  I am able to stream with ffmpeg an mp4 file with h264 encoded video and aac encoded audio to flash flv output. The command I used is :

  


  ffmpeg -re -i bigbuckbunny_HD_60fps.mp4 -c copy -f flv rtmp ://192.168.3.64:1935/main/stream0

  


  When I am trying to use the tee option to duplicate the output I am failing with an error. This is the command I use :

  


  ffmpeg -re -i bigbuckbunny_HD_60fps.mp4 -c copy -f tee "[f=flv]rtmp ://192.168.3.64:1935/main/stream0|[f=flv]rtmp ://192.168.3.64:1935/main/stream1"

  


  However, it fails. What I am missing ? The output I have from ffmpeg is :

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'bigbuckbunny_HD_60fps.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf54.29.104
  Duration: 00:10:34.58, start: 0.000000, bitrate: 4279 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 4141 kb/s, 60 fps, 60 tbr, 90k tbn, 120 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Output #0, tee, to '[f=flv]rtmp://192.168.3.64:1935/mainconcept/obs_stream|[f=flv]rtmp://192.168.3.64:1935/mainconcept/obs_stream1':
Output file #0 does not contain any stream


  


• How do I run FFmpeg functions like avformat_version() or avformat_configuration() in a simple C project ? 0x000007b error

  19 juillet 2023, par Alan Thomson

  I have compiled FFmpeg with shared libraries and linked it to my C project via CMake. Everything seems fine as I can run av_version_info(); in my C code and print the output with no issue. However, once I start using other simple commands like avformat_version(); or avformat_configuration();, my program crashes with no debugging output.

  


  What could be causing this ? I am on Windows and using Qt Creator as my IDE by the way.

  


  Here's main.c :

  


  #include &#xA;&#xA;#include <libavutil></libavutil>avutil.h>&#xA;#include <libavformat></libavformat>avformat.h>&#xA;#include <libavutil></libavutil>avassert.h>&#xA;&#xA;int main()&#xA;{&#xA;    const char* info1 = av_version_info();&#xA;    const int info2 = avformat_version();&#xA;    const char* info3 = avformat_configuration();&#xA;    printf(info1);&#xA;    printf("%d", info2);&#xA;    printf(info3);&#xA;&#xA;    return 0;&#xA;}&#xA;

  


  Here's my CMakeLists.txt :

  


  cmake_minimum_required(VERSION 3.5)

project(PlainCApp LANGUAGES C)

add_executable(PlainCApp main.c)

target_include_directories(PlainCApp
    PUBLIC
    C:/FFmpeg
)

target_link_libraries(PlainCApp
    PUBLIC
    C:/FFmpeg/libavformat/avformat.lib
    C:/FFmpeg/libavcodec/avcodec.lib
    C:/FFmpeg/libavutil/avutil.lib
    C:/FFmpeg/libswscale/swscale.lib
    C:/FFmpeg/libswresample/swresample.lib
#    C:/FFmpeg/libavdevice/avdevice.lib
#    C:/FFmpeg/libavfilter/avfilter.lib
#    C:/FFmpeg/libpostproc/postproc.lib
)

install(TARGETS PlainCApp
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)


  


  I tried looking into FFmpeg source to understand what could be causing this discrepancy. I also tried recompiling FFmpeg and downloading a newer version. None of this helped. The program still crashed :

  


  

  


  However, good news is, it compiles with gcc inside MinGW just fine :
gcc main.c -o main -I C:/FFmpeg -L C:/FFmpeg/libavutil -lavutil -L C:/FFmpeg/libavformat -lavformat outputs as expected.