[avcpp] Enable not-gpl version of AvCpp library which is BSD or LGPL

[baziorek]

Is your feature request related to a problem? Please describe.

avcpp has BSD or LGPL license. Unfortunately when I'm installing this with VCPKG I see that FFmpeg is installed with ... also GPL components.
As I know how GPL works - it forcing us to make our entire program GPL.

There are no other options (eg. avcpp[no-gpl]) of installing:

./vcpkg/vcpkg search avcpp
avcpp                    2.4.0            Wrapper for the FFmpeg that simplify usage it from C++ projects.

So I'm suggesting to add them, e.g.:

• avcpp[all] # which is avcpp[no-gpl,gpl]
• avcpp[no-gpl]
• avcpp[gpl]

IMO default option should be no-gpl.

AvCpp is wrapper to FFmpeg , but according to FFmpeg license details page is it has components both LGPL and GPL.

When listing possibilities of FFmpeg in vcpkg:

./vcpkg/vcpkg search ffmpeg
avcpp                    2.4.0            Wrapper for the FFmpeg that simplify usage it from C++ projects.
dav1d                    1.5.0            dav1d is a new open-source AV1 decoder developed by the VideoLAN and FFmpe...
ffmpeg                   7.1#2            A library to decode, encode, transcode, mux, demux, stream, filter and pla...
ffmpeg[all]                               Build with all allowed dependencies selected that are compatible with the ...
ffmpeg[all-gpl]                           Build with all allowed dependencies selected that are compatible with the ...
ffmpeg[all-nonfree]                       Build with all allowed dependencies selected with a non-redistributable li...
ffmpeg[alsa]                              Enable ALSA support
ffmpeg[amf]                               AMD AMF codec support
ffmpeg[aom]                               AV1 video encoding/decoding via libaom support in ffmpeg
ffmpeg[ass]                               Libass subtitles rendering, needed for subtitles and ass filter support in...
ffmpeg[avcodec]                           Build the avcodec library
ffmpeg[avdevice]                          Build the avdevice library
ffmpeg[avfilter]                          Build the avfilter library
ffmpeg[avformat]                          Build the avformat library
ffmpeg[avisynthplus]                      Reading of AviSynth script files
ffmpeg[avresample]                        Build the avresample library
ffmpeg[bzip2]                             Bzip2 support
ffmpeg[dav1d]                             AV1 decoding via libdav1d
ffmpeg[drawtext]                          Enable the drawtext filter
ffmpeg[dvdvideo]                          DVD-Video demuxer
ffmpeg[fdk-aac]                           AAC de/encoding via libfdk-aac, **including GPL-incompatible patent-encumb...
ffmpeg[ffmpeg]                            Build the ffmpeg application
ffmpeg[ffplay]                            Build the ffplay application
ffmpeg[ffprobe]                           Build the ffprobe application
ffmpeg[fontconfig]                        Useful for drawtext filter
ffmpeg[freetype]                          Needed for drawtext filter
ffmpeg[fribidi]                           Improves drawtext filter
ffmpeg[gpl]                               Allow use of GPL code, the resulting libs and binaries will be under GPL
ffmpeg[iconv]                             Iconv support
ffmpeg[ilbc]                              iLBC de/encoding via libilbc
ffmpeg[lzma]                              lzma support
ffmpeg[modplug]                           ModPlug via libmodplug
ffmpeg[mp3lame]                           MP3 encoding via libmp3lame
ffmpeg[nonfree]                           Allow use of nonfree code, the resulting libs and binaries will be unredis...
ffmpeg[nvcodec]                           Nvidia video decoding/encoding acceleration
ffmpeg[opencl]                            OpenCL processing
ffmpeg[opengl]                            OpenGL rendering
ffmpeg[openh264]                          H.264 de/encoding via openh264
ffmpeg[openjpeg]                          JPEG 2000 de/encoding via OpenJPEG
ffmpeg[openmpt]                           Decoding tracked files via libopenmpt
ffmpeg[openssl]                           Needed for https support if gnutls, libtls or mbedtls is not used
ffmpeg[opus]                              Opus de/encoding via libopus
ffmpeg[postproc]                          Build the postproc library
ffmpeg[qsv]                               Intel QSV Codec
ffmpeg[sdl2]                              Sdl2 support
ffmpeg[snappy]                            Snappy compression, needed for hap encoding
ffmpeg[soxr]                              Include libsoxr resampling
ffmpeg[speex]                             Speex de/encoding via libspeex
ffmpeg[srt]                               Haivision SRT protocol
ffmpeg[ssh]                               SFTP protocol via libssh
ffmpeg[swresample]                        Build the swresample library
ffmpeg[swscale]                           Build the swscale library
ffmpeg[tensorflow]                        TensorFlow as a DNN module backend for DNN based filters like sr
ffmpeg[tesseract]                         Tesseract, needed for ocr filter
ffmpeg[theora]                            Theora encoding via libtheora
ffmpeg[version3]                          Upgrade (L)GPL to version 3
ffmpeg[vorbis]                            Vorbis en/decoding via libvorbis, native implementation exists
ffmpeg[vpx]                               VP8 and VP9 de/encoding via libvpx
ffmpeg[webp]                              WebP encoding via libwebp
ffmpeg[x264]                              H.264 encoding via x264
ffmpeg[x265]                              HEVC encoding via x265
ffmpeg[xml2]                              XML parsing using the C library libxml2, needed for dash demuxing support
ffmpeg[zlib]                              zlib support
ffnvcodec                12.2.72.0#1      FFmpeg version of Nvidia Codec SDK headers.
freerdp[ffmpeg]                           Enable image scaling, video and audio with ffmpeg
gazebo[ffmpeg]                            Enable audio-video capabilities
netgen[mpeg]                              enable video recording with FFmpeg
opencv[ffmpeg]                            ffmpeg support for opencv
opencv4[ffmpeg]                           ffmpeg support for opencv
openimageio[ffmpeg]                       Enable ffmpeg support for openimageio
pangolin[ffmpeg]                          Build support for ffmpeg video input
qtmultimedia[ffmpeg]                      Build with ffmpeg
sdl2-mixer-ext[ffmpeg]                    Use FFMPEG to play WMA and AAC audio formats.

According to chatgpt components with GPL license are:

• ffmpeg[gpl]
• ffmpeg[all-gpl]
• ffmpeg[x264]
• ffmpeg[x265]
• ffmpeg[theora]
• ffmpeg[fdk-aac]
• ffmpeg[modplug]
• ffmpeg[fribidi]
• ffmpeg[openjpeg]
• ffmpeg[nonfree] - it is even worse than GPL

Proposed solution

(Described in section "Is your feature request related to a problem? Please describe."):

I'm suggesting to add extra config options, e.g.:

• avcpp[all] # which is avcpp[no-gpl,gpl]
• avcpp[no-gpl]
• avcpp[gpl]

Describe alternatives you've considered

There are two alternatives:

1. Build AvCpp without VCPKG
2. Provide our program as GPL

Additional context

No response

[Osyotr]

You should add ffmpeg to your top level manifest if you want more control over the features.

[Mengna-Li]

The feature we add is usually a option that already exists upstream. You can control GPL through the feature of ffmpeg.