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• Vcpkg building FFmpeg with libxml2

  15 décembre 2019, par Subestima

  First off all im a newbie in this area so if im asking something really stupid or non sense im sorry in advance, so lets get right to the point... im trying to add features to the ffmpeg, and by what i know i have to modify CONTROL file and portfile.cmake but as it seems its not enough i dont understand the errors and i cant get more info about this in the internet so if you could give me some info how to do it properly it would allready mean a lot to me ! i will leave the portions of code and error file

  **portfile.cmake:**
  
  if("libxml2" IN_LIST FEATURES)
  
      set(OPTIONS "${OPTIONS} --enable-libxml2")
  
  endif()
  
  
  
  **CONTROL:**
  
  Feature: libxml2
  
  Description: Libxml2 is the XML C parser and toolkit developed for the Gnome project (but usable outside of the Gnome platform)
  
  Build-Depends: zlib, libiconv, liblzma
  
  
  
  **Command Prompt after (vcpkg install ffmpeg[libxml2]:x64-windows)**
  
  CMake Error at scripts/cmake/vcpkg_execute_required_process.cmake:72 (message):
  
      Command failed: C:/vcpkg/downloads/tools/msys2/msys64/usr/bin/bash.exe --noprofile --norc C:/vcpkg/ports/ffmpeg\build.sh C:/vcpkg/buildtrees/ffmpeg/x64-windows-rel C:/vcpkg/buildtrees/ffmpeg/src/n4.2-02d8c63f80 C:/vcpkg/packages/ffmpeg_x64-windows "--enable-asm --enable-yasm --disable-doc --enable-debug --enable-runtime-cpudetect --enable-libxml2 --disable-openssl --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-libvpx --disable-libx264 --disable-opencl --disable-lzma --disable-bzlib --enable-avresample  --disable-static --enable-shared --extra-cflags=-DHAVE_UNISTD_H=0  --extra-cflags=-MD --extra-cxxflags=-MD"
  
      Working Directory: C:/vcpkg/buildtrees/ffmpeg/x64-windows-rel
  
      Error code: 1
  
      See logs for more information:
  
        C:\vcpkg\buildtrees\ffmpeg\build-x64-windows-rel-out.log
  
  
  
  Call Stack (most recent call first):
  
    ports/ffmpeg/portfile.cmake:197 (vcpkg_execute_required_process)
  
    scripts/ports.cmake:94 (include)
  
  
  
  
  
  Error: Building package ffmpeg:x64-windows failed with: BUILD_FAILED
  
  Please ensure you're using the latest portfiles with `.\vcpkg update`, then
  
  submit an issue at https://github.com/Microsoft/vcpkg/issues including:
  
    Package: ffmpeg:x64-windows
  
    Vcpkg version: 2019.09.12-nohash**strong text**
  
  
  
  **Log Error file:**
  
  === CONFIGURING === ERROR: libxml-2.0 not found using pkg-config
  
  
  
  If you think configure made a mistake, make sure you are using the latest version from Git.  If the latest version fails, report the problem to the ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net. Include the log file "ffbuild/config.log" produced by configure as this will help solve the problem.

  Thank you for your attention,
  Regards Pedro Cunha !

• Unknown OS 'msys_nt-6.1'. using Minw on win7 64bit

  31 mai 2015, par user63898

  i try to compile FFmpeg from source using MSYS2 and MIngW im using win7 64 bit .
  using .

  $ ./configure --enable-shared

  im getting this error :

  Unknown OS 'msys_nt-6.1'.
  
  
  
  If you think configure made a mistake, make sure you are using the latest
  
  version from Git.  If the latest version fails, report the problem to the
  
  ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
  
  Include the log file "config.log" produced by configure as this will help
  
  solve the problem.

  looking in to config.log
  i see ( the end of the log ) :

  gcc -std=c99 -Wall -O3 -c -o /tmp/ffconf.fnJeLuIu.o /tmp/ffconf.e8DJYGJM.c
  
  check_code cc  int test[2*(sizeof(void *) > 4) - 1]
  
  check_cc
  
  BEGIN /tmp/ffconf.e8DJYGJM.c
  
      1   int main(void) { int test[2*(sizeof(void *) > 4) - 1]; return 0; }
  
  END /tmp/ffconf.e8DJYGJM.c
  
  gcc -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -std=c99 -c -o /tmp/ffconf.fnJeLuIu.o /tmp/ffconf.e8DJYGJM.c
  
  G:/msys64/tmp/ffconf.e8DJYGJM.c: In function 'main':
  
  G:/msys64/tmp/ffconf.e8DJYGJM.c:1:22: error: size of array 'test' is negative
  
   int main(void) { int test[2*(sizeof(void *) > 4) - 1]; return 0; }
  
                        ^
  
  check_cpp_condition stddef.h defined(__x86_64__)
  
  check_cpp
  
  BEGIN /tmp/ffconf.e8DJYGJM.c
  
      1   #include 
  
      2   #if !(defined(__x86_64__))
  
      3   #error "unsatisfied condition: defined(__x86_64__)"
  
      4   #endif
  
  END /tmp/ffconf.e8DJYGJM.c
  
  gcc -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -std=c99 -E -o /tmp/ffconf.fnJeLuIu.o /tmp/ffconf.e8DJYGJM.c
  
  G:/msys64/tmp/ffconf.e8DJYGJM.c:3:2: error: #error "unsatisfied condition: defined(__x86_64__)"
  
   #error "unsatisfied condition: defined(__x86_64__)"
  
    ^
  
  Unknown OS 'msys_nt-6.1'. 

  what did i miss ? what did i do wrong ?
  Thanks

• ffmpeg color space metadata not working for some sources

  28 août 2023, par pawel

  I have a bit of a pickle. I'm trying to change incorrect tags on mp4 videos using ffmpeg.

  


  I'm using this command (in a bat file) :

  


  ffmpeg.exe -i %1 -colorspace "rgb" -color_primaries "bt709" -c copy -y %1.sRGB.mp4

  


  I'm on windows and I'm using ffmpeg 6.0

  


  The above command sets the tags for some videos correctly for for others does nothing. The file sizes change but ffprobe still shows me the old tags. It doesn't matter what color spaces I request or if I use numbers or strings.

  


  The only difference I can see in the source videos (ffprobe) is the SAR and DAR section.

  


  Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/iec61966-2-1, progressive), 3840x2160, 91942 kb/s, SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 30k tbn (default)

  


  Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/iec61966-2-1, progressive), 3840x2160 [SAR 1:1 DAR 16:9], 119433 kb/s, 29.97 fps, 29.97 tbr, 30k tbn (default)

  


  the values are still the same but the grouping is different. the second one is the one that is not working through ffmpeg.

  


  do I need to provide more information on the commandline ? direct it to a stream I want to alter ? I'm a bit out of my depth here and google is not helping much on this.

  


  EDIT : updated to latest ffmpeg and I get warnings telling me that my commands were ignored :

  


  Codec AVOption colorspace (color space) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.

  


  however I get the same warnings on the mp4s that worked fine before and it is no longer working in the latest ffmpeg.

  


  my goal is to get from :

  


  Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, gbr/bt709/bt709, progressive)

  


  to :

  


  Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive)

  


  basically I want to remove bt709 tag from it