Expose required ffmpeg version programmatically

[0x90d]

It would be helpful if we could programmatically retrieve the required ffmpeg version (e.g., ffmpeg 7.0.1), so we can tell users exactly which version they need to install. Often, users just install the latest release and then complain when it doesn’t work. Unfortunately, LIBAVCODEC_VERSION_MAJOR is not reliable enough. We also can’t simply tell users, "use an ffmpeg version that includes libavcodec_6.x.dll". But if there were a constant string indicating the supported ffmpeg version (e.g., "7.0.x"), users would immediately understand what to install.

[Ruslan-B]

I’ll address it in 8+

[Ruslan-B]

Working on it now

[Ruslan-B]

technically you have to call av version info, however can be extracted via reelection I'll address it in 8.0.0.xxxx 8.0 are available

[Ruslan-B]

The assembly version follows FFmpeg version: MAJOR.MINOR matches FFmpeg (e.g. 8.0.x = FFmpeg 8.0).

You can check the assembly version programmatically:

typeof(ffmpeg).Assembly.GetName().Version // 8.0.0.1

Also LibraryVersionMap is available without loading native libraries:

DynamicallyLoadedBindings.LibraryVersionMap["avcodec"] // 62

After loading native, ffmpeg.av_version_info() returns the full version string.