Quoting Diego Biurrun (2016-05-04 10:00:51) > First off: This is a brilliant general idea, that help text is badly in > need of improvement. > > On Tue, May 03, 2016 at 08:10:54AM +0200, Anton Khirnov wrote: > > --- a/configure > > +++ b/configure > > @@ -185,53 +185,62 @@ Individual component options: > > + > > + Using any of the following switches will allow Libav to link to the > > + corresponding external library. All the components depending on that > > library > > + will become enabled, if all their other dependencies are met and they > > are not > > + explicitly disabled. E.g. --enable-libwavpack will enable linking to > > + libwavpack and allow the libwavpack encoder to be built, unless it is > > + specifically disabled with --disable-encoder=libwavpack. > > + > > + Note that only the system libraries are auto-detected. All the other > > external > > + libraries must be explicitly enabled. > > + > > + --enable-avisynth video frameserver > > + --enable-bzlib bzip2 compression [autodetect] > > + --enable-frei0r video filtering plugins > > + --enable-gnutls crypto > > + --enable-libbs2b Bauer stereophonic-to-binaural DSP > > + --enable-libcdio audio CD input > > + --enable-libdc1394 IEEE 1394/Firewire camera input > > + --enable-libdcadec DCA audio decoding > > + --enable-libfaac AAC audio encoding > > + --enable-libfdk-aac AAC audio encoding/decoding > > + --enable-libfreetype font rendering > > + --enable-libgsm GSM audio encoding/decoding > > + --enable-libilbc ILBC audio encoding/decoding > > + --enable-libkvazaar HEVC video encoding > > + --enable-libmp3lame MP3 audio encoding > > + --enable-libnpp CUDA processing > > + --enable-libopencore-amrnb AMR-NB audio encoding/decoding > > + --enable-libopencore-amrwb AMR-WB audio encoding/decoding > > + --enable-libopencv computer vision > > + --enable-libopenh264 H.264 video encoding/decoding > > + --enable-libopenjpeg JPEG 2000 image encoding/decoding > > + --enable-libopus Opus audio encoding/decoding > > + --enable-libpulse Pulseaudio sound server > > + --enable-librtmp RTMP streaming > > + --enable-libschroedinger Dirac video encoding/decoding > > + --enable-libsnappy snappy compression > > + --enable-libspeex Speex audio encoding/decoding > > + --enable-libtheora Theora video encoding/decoding > > + --enable-libtwolame MP2 audio encoding > > + --enable-libvo-aacenc AAC audio encoding > > + --enable-libvo-amrwbenc AMR-WB audio encoding > > + --enable-libvorbis Vorbis audio encoding/decoding > > + --enable-libvpx VP* video encoding/decoding > > + --enable-libwavpack Wavpack audio encoding/decoding > > + --enable-libwebp WebP image encoding/decoding > > + --enable-libx264 H.264 video encoding > > + --enable-libx265 HEVC video encoding > > + --enable-libxavs Chinese AVS video encoding > > + --enable-libxcb X window system protocol communication > > + --enable-libxcb-shm X11 shm communication [auto] > > + --enable-libxcb-xfixes X11 mouse rendering [auto] > > + --enable-libxvid MPEG-4 ASP video encoding > > + --enable-openssl crypto > > + --enable-x11grab X11 grabbing through xlib (legacy, use xcb > > instead) > > + --enable-zlib compression [autodetect] > > The problem I see is that much of that reads as if it were functionality > that is only externally available. However, much of the functionality > is natively available and the descriptions may suggest otherwise.
The issue has also been raised by wm4 on IRC. But I think the subject is quite complex and this short help text will never be able to properly explain it, unless it grows into a full manual. So IMO the best we can do is point the user to the full docs for more details. > Long story short, I think this should be further subdivided into > sections for libs that extend functionality in some way and libs that > provide alternatives to existing functionality. The problem I see with this approach is that those two categories are not well defined. E.g. libopus does opus decoding (which we can also do natively, though it does not have some special features libopus has) and encoding (which we cannot do). So where does it go then? Or take hardware decoders -- we typically have a sw alternative to all of them, but one can also argue that it's a special kind of functionality. I agree that this table should be more structured, but I think it should be on the basis of what the libraries do (e.g. audio/video/other stuff). -- Anton Khirnov _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
