[FFmpeg-devel] ffmpg -version gives strange version output

[David Favor]

Helmut Tessarek wrote:
> This happens after I compile the git ffmpeg source (baaa6d6):
> 
> ./ffmpeg -version
> ffmpeg version 2.1.git-tessus
> built on Feb 14 2014 22:15:20 with llvm-gcc 4.2.1 (LLVM build 2336.1.00)
> configuration: --prefix=/Users/tessus/data/ext/ffmpeg/sw --as=yasm
> --extra-version=tessus --disable-shared --enable-static --disable-ffplay
> --enable-gpl --enable-pthreads --enable-postproc --enable-libmp3lame
> --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid
> --enable-libspeex --enable-bzlib --enable-zlib --enable-libopencore-amrnb
> --enable-libopencore-amrwb --enable-libxavs --enable-version3
> --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvpx --enable-libgsm
> --enable-libopus --enable-libmodplug --enable-fontconfig --enable-libfreetype
> --enable-libass --enable-libbluray --enable-filters --enable-runtime-cpudetect
> libavutil      52. 63.101 / 52. 63.101
> libavcodec     55. 52.101 / 55. 52.101
> libavformat    55. 32.101 / 55. 32.101
> libavdevice    55.  9.101 / 55.  9.101
> libavfilter     4.  1.102 /  4.  1.102
> libswscale      2.  5.101 /  2.  5.101
> libswresample   0. 17.104 /  0. 17.104
> libpostproc    52.  3.100 / 52.  3.100
> 
> In previous versions it was shown as (just an exampe from a previous build):
> ffmpeg version N-60633-g674195c-tessus
> 
> I asked this question on the #ffmpeg-devel channel as well and Michael
> suggested to clone the repository into a new directory and try again.
> 
> I did that and it did not help. Maybe it has to do with the --extra-version
> config option or somebody changed the build scripts, because the version.sh
> script does give me an output in the format N-MMMMM-gXXXXXXX, but I couldn't
> find that string anywhere in the code.
> 
> Isn't the build process supposed to write that info into a version file?
> 
> Cheers,
>   Helmut
> 

One trick you can do to set a specific version is this...

1) config + build ffmpeg

2) edit libavutil/ffversion.h adding a custom version

3) make (at top of tree again, which just rebuilds a few files)

Here's an example with latest version + date + changeset:

    ffmpeg version 2.2-2014-04-02-62040-gcecb6d6