building on linux

[gucio321]

Hi there,
I've just tried to build on my Fedora 32 and have it:

/home/username/git/d2/DGEngine/src/sfeMovie/AudioStream.cpp:31:10: fatal error: libswresample/swresample.h: No such file or directory
   31 | #include <libswresample/swresample.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/DGEngine.dir/build.make:1968: CMakeFiles/DGEngine.dir/src/sfeMovie/AudioStream.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:96: CMakeFiles/DGEngine.dir/all] Error 2
make: *** [Makefile:104: all] Error 2

[ghost]

Hi, that is an ffmpeg include file. Maybe the version included is not supported (I think ffmpeg 3 and 4 should work).

The provided Cmake file will use video support if it detects FFMPEG.

run this: cmake CMakeLists.txt -DDGENGINE_MOVIE_SUPPORT:BOOL=FALSE to skip movie support and see if it compiles. You need GCC 10+.

[gucio321]

Hi,
Now it works. Thanx,
BUT should works, I suppose:
ffmpeg version 4.2.4 Copyright (c) 2000-2020 the FFmpeg developers
gcc (GCC) 10.2.1 20201125 (Red Hat 10.2.1-9)

[gucio321]

And one more question:
in main.json of gamefilesd we can see:

  "action": {
    "name": "if.equal",
    "param1": { "name": "file.exists", "file": "ui_art/title.pcx" },
    "param2": true,
    "then": { "name": "load", "file": "ui/loadMain.json" },
    "else": { "name": "load", "file": ["ui/dataMissing.json", "DIABDAT"] }
  }

but file ui_art/tile.pcx deosn't exist, so wehere should I get it from?

[ghost]

You can find more information here: https://github.com/dgengin/DGEngine/wiki

Basically, you need the files that are inside DIABDAT.MPQ, which comes with the original game to be in a DIABDAT folder next to the gamefilesd folder or you can compile with the physfs project here: https://github.com/dgengin/physfs and then you can use that file directly without extracting it.

[gucio321]

ok, works, thanx for help

[gucio321]

@dgengin but why video doesn't work?
It should be all good.
ffmpeg version 4.3.1
OS: Fedora 33

[ghost]

I don't know. I'll try and find out. Probably the cmake_modules/FindFFmpeg.cmake file is not setting the paths properly.

Edit: did you try the fedora equivalent of this command from BUILD.txt?
sudo apt install libavdevice-dev libavformat-dev libavfilter-dev libavcodec-dev libswscale-dev libavutil-dev

You need to install the development libs, not the binary.

[gucio321]

I did, but this packages (libs) doesn't exist in fedora's package manager. As I see, they are included to ffmpeg.

  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100

[ghost]

I found this: https://computingforgeeks.com/how-to-install-ffmpeg-on-fedora/.

It says to install the development libs you do: sudo dnf -y install ffmpeg-devel.

[gucio321]

--  Found avcodec: /usr/include/ffmpeg /usr/local/lib/libavcodec.a
--  Found avdevice: /usr/include/ffmpeg /usr/local/lib/libavdevice.a
--  Found avfilter: /usr/include/ffmpeg /usr/local/lib/libavfilter.a
--  Found avformat: /usr/include/ffmpeg /usr/local/lib/libavformat.a
--  Found avutil: /usr/include/ffmpeg /usr/local/lib/libavutil.a
--  Found swresample: /usr/include/ffmpeg /usr/lib64/libswresample.so
--  Found swscale: /usr/include/ffmpeg /usr/local/lib/libswscale.a
-- Found SFML 2.5.1 in /usr/include
-- Configuring done
-- Generating done
-- Build files have been written to: /home/mszeptuch/git/d2/DGEngine

I installed, but still crashes
It looks like cmake finds all av* libs

[ghost]

I built successfully in fedora 32 using these instructions: https://tecadmin.net/install-ffmpeg-on-fedora/
no errors.