mirror of
https://github.com/mpv-player/mpv
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fc013ea8ac
Unfortunately I'm also adding the full text of the LGPL license text, because the GPL one was already present in this repository, and I don't want to imply that the GPL somehow has priority.
124 lines
6.3 KiB
Plaintext
124 lines
6.3 KiB
Plaintext
mpv is a fork of mplayer2, which is a fork of MPlayer.
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mpv as a whole is licensed under the GNU General Public License GPL version 2
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or later (called GPLv2+ in this document, see LICENSE.GPL for full license
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text) by default, or the GNU Lesser General Public License LGPL version 2 or
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later (LGPLv2.1+ in this document, see LICENSE.LGPL for full license text) if
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built with the --enable-lgpl configure switch.
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Most source files are LGPLv2.1+ or GPLv2+, but some files are available under
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more liberal licenses, such as BSD, MIT, ISC, and possibly others. Look at the
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copyright header of each source file, and grep the sources for "Copyright" if
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you need to know details. C source files without Copyright notice are usually
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licensed as LGPLv2.1+. Also see the list of files with specific licenses below
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(not all files can have a standard license header).
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All new contributions must be LGPLv2.1+ licensed. Using a more liberal license
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compatible to LGPLv2.1+ is also ok.
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If changes are done on GPL code, must come with the implicit agreement that the
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project can relicense the changes to LGPLv2.1+ at a later point without asking
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the contributor. This is a safeguard for making potential relicensing of
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remaining GPL code to LGPLv2.1+ easier.
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For information about authors and contributors, consult the git log, which
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contains the complete SVN and CVS history as well.
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"v2.1+" in this context means "version 2.1 or later".
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Some libraries are GPLv2+ or GPLv3+ only. Building mpv with Samba support makes
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it GPLv3+.
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mpv can be built as LGPLv2.1+ with the --enable-lgpl configure option. To add
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a LGPL mode to mpv, MPlayer code had to be relicensed from GPLv2+ to LGPLv2.1+
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by asking the MPlayer authors for permission. Since permission could not be
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obtained from everyone, LGPL mode disables the following features, some of
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them quite central:
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- no audio filtering, which breaks: --volume, --af, replaygain, pitch
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correction, fine control about downmix/upmix/resampling behavior
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- Linux X11 video output
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- Linux audio output via ALSA (PulseAudio works)
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- BSD audio output via OSS
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- NVIDIA/Linux hardware decoding (vdpau, although CUDA usually works)
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- many builtin video filters (use libavfilter instead)
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- automatic rotation and stereoscopic video handling
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- Linux TV input
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- the --frames option
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- the add/cycle and sub-add/audio-add/sub-remove/audio-remove commands
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- video format conversion (if not supported by the VO)
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- minor features: jack, DVD, CDDA, SMB, CACA, legacy direct3d VO
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Some of these will be fixed in the future. The lack of the add/cycle commands
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makes this particularly useless for CLI mode, and most of the appeal of LGPL
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is for libmpv anyway. Thus it's not recommended to build mpv CLI in LGPL mode
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at all.
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The following files are still GPL only (--enable-lgpl disables them):
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audio/filter/* will be replaced with new filter chain
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audio/filter/af_format.c mostly LGPL (except af glue code)
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audio/filter/af_lavc3enc.c as above
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audio/filter/af_lavfi.c as above
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audio/filter/af_scaletempo.c as above
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audio/filter/af_rubberband.c as above
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audio/out/ao_alsa.c chaotic history, one later author did not decide
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audio/out/ao_jack.c will stay GPL
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audio/out/ao_oss.c will stay GPL
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audio/audio.* needed by af code only
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demux/demux_tv.c will stay GPL
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stream/ai_* will stay GPL (TV code)
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stream/audio_in.* will stay GPL (TV code)
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stream/dvb* must stay GPL
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stream/frequencies.* must stay GPL
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stream/stream_cdda.c unknown
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stream/stream_dvb.* must stay GPL
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stream/stream_dvd.c unknown
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stream/stream_dvd_common.* unknown
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stream/stream_dvdnav.c unknown
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stream/stream_smb.c will stay GPLv3
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stream/stream_tv.c will stay GPL
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stream/tv* will stay GPL
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video/filter/vf_crop.c will be deleted
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video/filter/vf_dsize.c will be deleted
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video/filter/vf_expand.c will be deleted
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video/filter/vf_flip.c will be deleted
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video/filter/vf_format.c will be deleted
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video/filter/vf_gradfun.c will be deleted
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video/filter/vf_mirror.c will be deleted
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video/filter/vf_noformat.c will be deleted
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video/filter/vf_pullup.c will be deleted
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video/filter/vf_rotate.c will be deleted
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video/filter/vf_scale.c will be deleted
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video/filter/vf_stereo3d.c will be deleted
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video/filter/vf_sub.c will be deleted
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video/filter/vf_yadif.c will be deleted
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video/out/opengl/hwdec_vaglx.c GPL
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video/out/vo_caca.c unknown
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video/out/vo_direct3d.c unknown
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video/out/vo_vaapi.c probably impossible (some company's code)
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video/out/vo_vdpau.c probably impossible (nVidia's code)
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video/out/vo_x11.c probably impossible
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video/out/vo_xv.c probably impossible
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video/out/x11_common.* probably impossible
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video/vdpau.c hard (GPL-only parts must be ifdefed)
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video/vdpau.h unknown
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video/vdpau_mixer.* actual code must be rewritten
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DOCS/man/ GPLv2+
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bootstrap.py unknown license, probably GPLv2+ or LGPLv2+
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etc/mplayer-input.conf unknown license, probably GPLv2+
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mpv.desktop unknown license, probably GPLv2+
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etc/restore-old-bindings.conf unkniwn license, probably GPLv2+
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The following files contain some optional GPL code (--enable-lgpl disables it):
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input/cmd_list.c potentially some commands
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options/options.c --frames option
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options/parse_commandline.c dvd:// expansion
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player/audio.c libaf glue code
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player/loadfile.c --frames option (minor but probably fatal)
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player/osd.c OSD level 3
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player/command.c add/cycle command, possibly sub-add command
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None of the exceptions listed above affect the final binary if it's built as
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LGPL. Linked libraries still can affect the final license (for example if
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FFmpeg was built as GPL).
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