gstreamer: 1.14.4 -> 1.15.1, and extended gst-plugins-bad.

During the 1.14 -> 1.15 upgrade, lots of stuff stopped working because
gstreamer changed what features are enabled by default and which ones are
automatically turned on/off via pkgconfig dependency detection.

This resulted in the `gstreamer` ("core" attribute in nixpkgs) package
to have only 15 of its previous 163 build targets enabled, and downstream
packages breaking correspondingly.

To ease maintainability and to ensure users will find the expected features
available (and when not, will see in the nix file why not), we now pass
the `-Dauto_features=enabled` Meson build flag to all gstreamer builds,
which sets all `auto` dependencies to `enabled`, and we explicitly disable
those that we can't build.

This means in particular that `gst-plugins-bad` now has vastly more integrations
(namely all for which nixpkgs has libraries available).

pkgs/development/libraries/gstreamer/bad/default.nix

@@ -1,10 +1,40 @@
 { stdenv, fetchurl, fetchpatch, meson, ninja, gettext
+, config
 , pkgconfig, python3, gst-plugins-base, orc
+, gobject-introspection
 , faacSupport ? false, faac ? null
 , faad2, libass, libkate, libmms, librdf, ladspaH
 , libnice, webrtc-audio-processing, lilv, lv2, serd, sord, sratom
 , libbs2b, libmodplug, mpeg2dec
 , openjpeg, libopus, librsvg
+, bluez
+, chromaprint
+, curl
+, directfb
+, fdk_aac
+, flite
+, libaom
+, libdc1394
+, libde265
+, libdrm
+, libdvdnav
+, libdvdread
+, libgudev
+, libofa
+, libsndfile
+, libusb1
+, neon
+, openal
+, opencv3
+, openexr
+, openh264
+, pango
+, sbc
+, soundtouch
+, spandsp
+, srtp
+, zbar
+, wayland-protocols
 , wildmidi, fluidsynth, libvdpau, wayland
 , libwebp, xvidcore, gnutls, mjpegtools
 , libGLU_combined, libintl, libgme
@@ -15,11 +45,11 @@
 assert faacSupport -> faac != null;
 
 let
-  inherit (stdenv.lib) optional;
+  inherit (stdenv.lib) optional optionals;
 in
 stdenv.mkDerivation rec {
   name = "gst-plugins-bad-${version}";
-  version = "1.14.4";
+  version = "1.15.1";
 
   meta = with stdenv.lib; {
     description = "Gstreamer Bad Plugins";
@@ -40,27 +70,22 @@ stdenv.mkDerivation rec {
   '';
 
   patches = [
-    (fetchpatch {
-        url = "https://bug794856.bugzilla-attachments.gnome.org/attachment.cgi?id=370409";
-        sha256 = "0hy0rcn35alq65yqwri4fqjz2hf3nyyg5c7rnndk51msmqjxpprk";
-    })
     ./fix_pkgconfig_includedir.patch
-    # Enable bs2b compilation
-    # https://bugzilla.gnome.org/show_bug.cgi?id=794346
-    (fetchurl {
-      url = https://bugzilla.gnome.org/attachment.cgi?id=369724;
-      sha256 = "1716mp0h2866ab33w607isvfhv1zwyj71qb4jrkx5v0h276v1pwr";
-    })
   ];
 
   src = fetchurl {
     url = "${meta.homepage}/src/gst-plugins-bad/${name}.tar.xz";
-    sha256 = "1r8dma3x127rbx42yab7kwq7q1bhkmvz2ykn0rnqnzl95q74w2wi";
+    sha256 = "0dpky8a0pbwwkc5r8hawi5yizdqk65j9liwvhxkjwbnpv53n5y10";
   };
 
   outputs = [ "out" "dev" ];
 
-  nativeBuildInputs = [ meson ninja pkgconfig python3 gettext ];
+  nativeBuildInputs = [
+    meson ninja pkgconfig python3 gettext gobject-introspection
+  ]
+  ++ optionals stdenv.isLinux [
+    wayland-protocols
+  ];
 
   buildInputs = [
     gst-plugins-base orc
@@ -71,6 +96,33 @@ stdenv.mkDerivation rec {
     lilv lv2 serd sord sratom # lv2 plug-in
     libmodplug mpeg2dec
     openjpeg libopus librsvg
+    bluez
+    chromaprint
+    curl.dev
+    directfb
+    fdk_aac
+    flite
+    libaom
+    libdc1394
+    libde265
+    libdrm
+    libdvdnav
+    libdvdread
+    libgudev
+    libofa
+    libsndfile
+    libusb1
+    neon
+    openal
+    opencv3
+    openexr
+    openh264
+    pango
+    sbc
+    soundtouch
+    spandsp
+    srtp
+    zbar
     fluidsynth libvdpau
     libwebp xvidcore gnutls libGLU_combined
     libgme openssl x265 libxml2
@@ -85,6 +137,48 @@ stdenv.mkDerivation rec {
     # TODO: mjpegtools uint64_t is not compatible with guint64 on Darwin
     ++ optional (!stdenv.isDarwin) mjpegtools;
 
+  mesonFlags = [
+    # Enables all features, so that we know when new dependencies are necessary.
+    "-Dauto_features=enabled"
+
+    "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
+
+    "-Ddts=disabled" # required `libdca` library not packaged in nixpkgs as of writing, and marked as "BIG FAT WARNING: libdca is still in early development"
+    "-Dfaac=${if faacSupport then "enabled" else "disabled"}"
+    "-Dgsm=disabled" # as of writing, with `gsm` in `buildInputs` we get "GSM plugin is enabled: found libgsm but no headers"; gsm packaging problem?
+    "-Diqa=disabled" # required `dssim` library not packaging in nixpkgs as of writing
+    "-Dmsdk=disabled" # not packaged in nixpkgs as of writing / no Windows support
+    # As of writing, with `libmpcdec` in `buildInputs` we get
+    #   "Could not find libmpcdec header files, but Musepack was enabled via options"
+    # This is likely because nixpkgs has the header in libmpc/mpcdec.h
+    # instead of mpc/mpcdec.h, like Arch does. The situation is not trivial.
+    # There are apparently 2 things called `libmpcdec` from the same author:
+    #   * http://svn.musepack.net/libmpcdec/trunk/src/
+    #   * http://svn.musepack.net/libmpc/trunk/include/mpc/
+    # Fixing it likely requires to first figure out with upstream which one
+    # is needed, and then patching upstream to find it (though it probably
+    # already works on Arch?).
+    "-Dmusepack=disabled"
+    "-Dopenmpt=disabled" # `libopenmpt` not packaged in nixpkgs as of writing
+    "-Dopenni2=disabled" # not packaged in nixpkgs as of writing
+    "-Dopensles=disabled" # not packaged in nixpkgs as of writing
+    "-Drtmp=disabled" # `librtmp` not packaged in nixpkgs as of writing
+    "-Dsctp=disabled" # required `usrsctp` library not packaged in nixpkgs as of writing
+    "-Dteletext=disabled" # required `zvbi` library not packaged in nixpkgs as of writing
+    "-Dtinyalsa=disabled" # not packaged in nixpkgs as of writing
+    "-Dvoaacenc=disabled" # required `vo-aacenc` library not packaged in nixpkgs as of writing
+    "-Dvoamrwbenc=disabled" # required `vo-amrwbenc` library not packaged in nixpkgs as of writing
+    "-Dvulkan=disabled" # Linux-only, and we haven't figured out yet which of the vulkan nixpkgs it needs
+    "-Dwasapi=disabled" # not packaged in nixpkgs as of writing / no Windows support
+    "-Dwpe=disabled" # required `wpe-webkit` library not packaged in nixpkgs as of writing
+
+    # Requires CUDA and we haven't figured out how to make Meson find CUDA yet;
+    # it probably searches via pkgconfig, for which we have no .pc files,
+    # see https://github.com/NixOS/nixpkgs/issues/54395
+    "-Dnvdec=disabled"
+    "-Dnvenc=disabled"
+  ];
+
   enableParallelBuilding = true;
 
   doCheck = false; # fails 20 out of 58 tests, expensive

pkgs/development/libraries/gstreamer/base/default.nix

@@ -2,6 +2,11 @@
 , pkgconfig, meson, ninja, gettext, gobject-introspection
 , python3, gstreamer, orc, pango, libtheora
 , libintl, libopus
+, isocodes
+, libjpeg
+, libvisual
+, tremor # provides 'virbisidec'
+, gtk-doc, docbook_xsl, docbook_xml_dtd_412
 , enableX11 ? stdenv.isLinux, libXv
 , enableWayland ? stdenv.isLinux, wayland
 , enableAlsa ? stdenv.isLinux, alsaLib
@@ -10,7 +15,7 @@
 
 stdenv.mkDerivation rec {
   name = "gst-plugins-base-${version}";
-  version = "1.14.4";
+  version = "1.15.1";
 
   meta = with lib; {
     description = "Base plugins and helper libraries";
@@ -22,28 +27,48 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}/src/gst-plugins-base/${name}.tar.xz";
-    sha256 = "0qbllw4kphchwhy4p7ivdysigx69i97gyw6q0rvkx1j81r4kjqfa";
+    sha256 = "0qvyx9gs7z2ryhdxxzynn9r1gphfk4xfkhd6dma02sbda9c5jckf";
   };
 
   outputs = [ "out" "dev" ];
 
-  nativeBuildInputs = [ pkgconfig python3 gettext gobject-introspection ]
+  nativeBuildInputs = [
-
+    pkgconfig python3 gettext gobject-introspection
+    gtk-doc
+    # Without these, enabling the 'gtk_doc' gives us `FAILED: meson-install`
+    docbook_xsl docbook_xml_dtd_412
+  ]
   # Broken meson with Darwin. Should hopefully be fixed soon. Tracking
   # in https://bugzilla.gnome.org/show_bug.cgi?id=781148.
   ++ lib.optionals (!stdenv.isDarwin) [ meson ninja ];
 
+  # On Darwin, we currently use autoconf, on all other systems Meson
+  # TODO Switch to Meson on Darwin as well
+
   # TODO How to pass these to Meson?
-  configureFlags = [
+  configureFlags = lib.optionals stdenv.isDarwin [
     "--enable-x11=${if enableX11 then "yes" else "no"}"
     "--enable-wayland=${if enableWayland then "yes" else "no"}"
     "--enable-cocoa=${if enableCocoa then "yes" else "no"}"
   ]
-
   # Introspection fails on my MacBook currently
   ++ lib.optional stdenv.isDarwin "--disable-introspection";
 
-  buildInputs = [ orc libtheora libintl libopus ]
+  mesonFlags = lib.optionals (!stdenv.isDarwin) [
+    # Enables all features, so that we know when new dependencies are necessary.
+    "-Dauto_features=enabled"
+    "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
+    "-Dgl-graphene=disabled" # not packaged in nixpkgs as of writing
+    # See https://github.com/GStreamer/gst-plugins-base/blob/d64a4b7a69c3462851ff4dcfa97cc6f94cd64aef/meson_options.txt#L15 for a list of choices
+    "-Dgl_winsys=[${lib.concatStringsSep "," (lib.optional enableX11 "x11" ++ lib.optional enableWayland "wayland" ++ lib.optional enableCocoa "cocoa")}]"
+  ]
+  ++ lib.optional (!enableX11) "-Dx11=disabled"
+  # TODO How to disable Wayland?
+  ++ lib.optional (!enableAlsa) "-Dalsa=disabled"
+  ++ lib.optional (!enableCdparanoia) "-Dcdparanoia=disabled"
+  ;
+
+  buildInputs = [ orc libtheora libintl libopus isocodes libjpeg libvisual tremor ]
     ++ lib.optional enableAlsa alsaLib
     ++ lib.optionals enableX11 [ libXv pango ]
     ++ lib.optional enableWayland wayland
@@ -61,10 +86,6 @@ stdenv.mkDerivation rec {
   doCheck = false; # fails, wants DRI access for OpenGL
 
   patches = [
-    (fetchpatch {
-        url = "https://bug794856.bugzilla-attachments.gnome.org/attachment.cgi?id=370414";
-        sha256 = "07x43xis0sr0hfchf36ap0cibx0lkfpqyszb3r3w9dzz301fk04z";
-    })
     ./fix_pkgconfig_includedir.patch
   ];
 }

pkgs/development/libraries/gstreamer/core/default.nix

@@ -2,12 +2,16 @@
 , pkgconfig, gettext, gobject-introspection
 , bison, flex, python3, glib, makeWrapper
 , libcap,libunwind, darwin
+, elfutils # for libdw
+, bash-completion
+, docbook_xsl, docbook_xml_dtd_412
+, gtk-doc
 , lib
 }:
 
 stdenv.mkDerivation rec {
   name = "gstreamer-${version}";
-  version = "1.14.4";
+  version = "1.15.1";
 
   meta = with lib ;{
     description = "Open source multimedia framework";
@@ -19,14 +23,10 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}/src/gstreamer/${name}.tar.xz";
-    sha256 = "1izzhnlsy83rgr4zl3jcl1sryxqbbigrrqw3j4x3nnphqnb6ckzr";
+    sha256 = "05ri9y37qkgvkb2xjywf32c3k9479b0af0m6cjigx04pgwsf42kq";
   };
 
   patches = [
-    (fetchpatch {
-        url = "https://bug794856.bugzilla-attachments.gnome.org/attachment.cgi?id=370411";
-        sha256 = "16plzzmkk906k4892zq68j3c9z8vdma5nxzlviq20jfv04ykhmk2";
-    })
     ./fix_pkgconfig_includedir.patch
   ];
 
@@ -35,13 +35,24 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     meson ninja pkgconfig gettext bison flex python3 makeWrapper gobject-introspection
+    bash-completion
+    gtk-doc
+    # Without these, enabling the 'gtk_doc' gives us `FAILED: meson-install`
+    docbook_xsl docbook_xml_dtd_412
   ];
+
   buildInputs =
-       lib.optionals stdenv.isLinux [ libcap libunwind ]
+       lib.optionals stdenv.isLinux [ libcap libunwind elfutils ]
     ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.CoreServices;
 
   propagatedBuildInputs = [ glib ];
 
+  mesonFlags = [
+    # Enables all features, so that we know when new dependencies are necessary.
+    "-Dauto_features=enabled"
+    "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
+  ];
+
   postInstall = ''
     for prog in "$dev/bin/"*; do
         # We can't use --suffix here due to quoting so we craft the export command by hand

pkgs/development/libraries/gstreamer/default.nix

@@ -13,7 +13,7 @@ rec {
 
   gst-plugins-ugly = callPackage ./ugly { inherit gst-plugins-base; };
 
-  gst-rtsp-server = callPackage ./rtsp-server { inherit gst-plugins-base; };
+  gst-rtsp-server = callPackage ./rtsp-server { inherit gst-plugins-base gst-plugins-bad; };
 
   gst-libav = callPackage ./libav { inherit gst-plugins-base; };
 

pkgs/development/libraries/gstreamer/good/default.nix

@@ -10,6 +10,10 @@
 , libXext
 , libXfixes
 , ncurses
+, xorg
+, libgudev
+, wavpack
+, jack2
 }:
 
 assert gtkSupport -> gtk3 != null;
@@ -19,7 +23,7 @@ let
 in
 stdenv.mkDerivation rec {
   name = "gst-plugins-good-${version}";
-  version = "1.14.4";
+  version = "1.15.1";
 
   meta = with stdenv.lib; {
     description = "Gstreamer Good Plugins";
@@ -36,7 +40,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}/src/gst-plugins-good/${name}.tar.xz";
-    sha256 = "0y89qynb4b6fry3h43z1r99qslmi3m8xhlq0i5baq2nbc0r5b2sz";
+    sha256 = "15f6klr7wg6jlcyx0qspi13s8wmc9fij1bx1bbvy90a9a72v97rb";
   };
 
   outputs = [ "out" "dev" ];
@@ -58,10 +62,27 @@ stdenv.mkDerivation rec {
     libXext # present feature but undeclared in meson_options.txt, see https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/issues/553
     libXfixes # present feature but undeclared in meson_options.txt, see https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/issues/553
     ncurses
+    xorg.libXfixes # present feature but undeclared in meson_options.txt, see https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/issues/553
+    xorg.libXdamage # present feature but undeclared in meson_options.txt, see https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/issues/553
+    wavpack
   ]
   ++ optional gtkSupport gtk3 # for gtksink
   ++ optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ]
-  ++ optionals stdenv.isLinux [ libv4l libpulseaudio libavc1394 libiec61883 ];
+  ++ optionals stdenv.isLinux [ libv4l libpulseaudio libavc1394 libiec61883 libgudev jack2 ];
+
+  mesonFlags = [
+    # Enables all features, so that we know when new dependencies are necessary.
+    "-Dauto_features=enabled"
+    "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
+    "-Dqt5=disabled" # not clear as of writing how to correctly pass in the required qt5 deps
+  ]
+  ++ optional (!gtkSupport) "-Dgtk3=disabled"
+  ++ optionals (!stdenv.isLinux) [
+    "-Djack=disabled" # unclear whether Jack works on Darwin
+  ]
+  ++ optionals (!stdenv.isLinux) [
+    "-Dv4l2-gudev=disabled"
+  ];
 
   # fails 1 tests with "Unexpected critical/warning: g_object_set_is_valid_property: object class 'GstRtpStorage' has no property named ''"
   doCheck = false;

pkgs/development/libraries/gstreamer/libav/default.nix

@@ -10,7 +10,7 @@ assert withSystemLibav -> libav != null;
 
 stdenv.mkDerivation rec {
   name = "gst-libav-${version}";
-  version = "1.14.4";
+  version = "1.15.1";
 
   meta = {
     homepage = https://gstreamer.freedesktop.org;
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}/src/gst-libav/${name}.tar.xz";
-    sha256 = "1nk5g24z2xx5kaw5cg8dv8skdc516inahmkymcz8bxqxj28qbmyz";
+    sha256 = "0hq5y8zg6a3fliwip7k85hg6s6amsmbqgrjl6axzrr3y6akcvslk";
   };
 
   outputs = [ "out" "dev" ];
@@ -34,4 +34,10 @@ stdenv.mkDerivation rec {
     [ gst-plugins-base orc bzip2 ]
     ++ optional withSystemLibav libav
     ;
+
+  mesonFlags = [
+    # Enables all features, so that we know when new dependencies are necessary.
+    "-Dauto_features=enabled"
+  ];
+
 }

pkgs/development/libraries/gstreamer/rtsp-server/default.nix

@@ -1,10 +1,12 @@
 { stdenv, fetchurl, meson, ninja, pkgconfig
-, gst-plugins-base, gettext, gobject-introspection
+, gettext, gobject-introspection
+, gst-plugins-base
+, gst-plugins-bad
 }:
 
 stdenv.mkDerivation rec {
   name = "gst-rtsp-server-${version}";
-  version = "1.14.4";
+  version = "1.15.1";
 
   meta = with stdenv.lib; {
     description = "Gstreamer RTSP server";
@@ -19,12 +21,18 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}/src/gst-rtsp-server/${name}.tar.xz";
-    sha256 = "1wc4d0y57hpfvv9sykjg8mxj86dw60mf696fbqbiqq6dzlmcw3ix";
+    sha256 = "0d0jaf7ir40dxpxs41wyb7m7riyl7wsqcb5qvd4vhwpz0dwxhpvl";
   };
 
   outputs = [ "out" "dev" ];
 
   nativeBuildInputs = [ meson ninja gettext gobject-introspection pkgconfig ];
 
-  buildInputs = [ gst-plugins-base ];
+  buildInputs = [ gst-plugins-base gst-plugins-bad ];
+
+  mesonFlags = [
+    # Enables all features, so that we know when new dependencies are necessary.
+    "-Dauto_features=enabled"
+    "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
+  ];
 }

pkgs/development/libraries/gstreamer/ugly/default.nix

@@ -2,12 +2,13 @@
 , gst-plugins-base, orc, gettext
 , a52dec, libcdio, libdvdread
 , libmad, libmpeg2, x264, libintl, lib
+, opencore-amr
 , darwin
 }:
 
 stdenv.mkDerivation rec {
   name = "gst-plugins-ugly-${version}";
-  version = "1.14.4";
+  version = "1.15.1";
 
   meta = with lib; {
     description = "Gstreamer Ugly Plugins";
@@ -25,7 +26,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}/src/gst-plugins-ugly/${name}.tar.xz";
-    sha256 = "08vd1xgwmapnviah47zv5h2r02qdd20y4f07rvv5zhv6y4vxh0mc";
+    sha256 = "17p9x30ywanz1lbk061kzd8bypcv5hkin6iyaqffp8alrwiak3qp";
   };
 
   outputs = [ "out" "dev" ];
@@ -37,8 +38,16 @@ stdenv.mkDerivation rec {
     a52dec libcdio libdvdread
     libmad libmpeg2 x264
     libintl
+    opencore-amr
   ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks;
     [ IOKit CoreFoundation DiskArbitration ]);
 
+  mesonFlags = [
+    # Enables all features, so that we know when new dependencies are necessary.
+    "-Dauto_features=enabled"
+    "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
+    "-Dsidplay=disabled" # sidplay / sidplay/player.h isn't packaged in nixpkgs as of writing
+  ];
+
   NIX_LDFLAGS = [ "-lm" ];
 }

pkgs/development/libraries/gstreamer/vaapi/default.nix

@@ -5,11 +5,11 @@
 
 stdenv.mkDerivation rec {
   name = "gst-vaapi-${version}";
-  version = "1.14.4";
+  version = "1.15.1";
 
   src = fetchurl {
     url = "${meta.homepage}/src/gstreamer-vaapi/gstreamer-vaapi-${version}.tar.xz";
-    sha256 = "18yha6119v7mwz47idv2vykzfssqfmh6hc824wqqsshwjvzdn66f";
+    sha256 = "1aazan6r6p5aabb671znjkh8kmpxkz68wvaickqwzb1bz0ijcivc";
   };
 
   outputs = [ "out" "dev" ];
@@ -27,6 +27,12 @@ stdenv.mkDerivation rec {
     mkdir -p $GST_PLUGIN_PATH_1_0
   '';
 
+  mesonFlags = [
+    # Enables all features, so that we know when new dependencies are necessary.
+    "-Dauto_features=enabled"
+    "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
+  ];
+
   meta = {
     homepage = https://gstreamer.freedesktop.org;
     license = stdenv.lib.licenses.lgpl21Plus;

pkgs/development/libraries/gstreamer/validate/default.nix

@@ -4,7 +4,7 @@
 
 stdenv.mkDerivation rec {
   name = "gst-validate-${version}";
-  version = "1.14.4";
+  version = "1.15.1";
 
   meta = {
     description = "Integration testing infrastructure for the GStreamer framework";
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}/src/gst-validate/${name}.tar.xz";
-    sha256 = "1ismv4i7ldi04swq76pcpd5apxqd52yify5hvlyan2yw9flwrp0q";
+    sha256 = "195hwblagfsnq1xn858al3f32jn5nynr4j5x395dpg3vl3c4k5v4";
   };
 
   outputs = [ "out" "dev" ];
@@ -31,4 +31,9 @@ stdenv.mkDerivation rec {
   propagatedBuildInputs = [ gstreamer gst-plugins-base ];
 
   enableParallelBuilding = true;
+
+  mesonFlags = [
+    # Enables all features, so that we know when new dependencies are necessary.
+    "-Dauto_features=enabled"
+  ];
 }

pkgs/development/libraries/libnice/default.nix

@@ -20,18 +20,20 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  nativeBuildInputs = [ meson ninja pkgconfig python3 gobject-introspection gtk-doc docbook_xsl docbook_xml_dtd_412 ];
+  nativeBuildInputs = [
+    meson ninja pkgconfig python3 gobject-introspection
+    gtk-doc
+    # Without these, enabling the 'gtk_doc' gives us `FAILED: meson-install`
+    docbook_xsl docbook_xml_dtd_412
+  ];
   buildInputs = [ gst_all_1.gstreamer gst_all_1.gst-plugins-base gnutls ];
   propagatedBuildInputs = [ glib gupnp-igd ];
 
   mesonFlags = [
-    "-Dgupnp=enabled"
+    # Enables all features, so that we know when new dependencies are necessary.
-    "-Dgstreamer=enabled"
+    "-Dauto_features=enabled"
-    "-Dignored-network-interface-prefix=enabled"
+    "-Dgtk_doc=enabled" # Disabled by default as of libnice-0.1.15
-    "-Dexamples=enabled"
+    "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
-    "-Dtests=enabled"
-    "-Dgtk_doc=enabled"
-    "-Dintrospection=enabled"
   ];
 
   # TODO; see #53293 etc.

pkgs/top-level/all-packages.nix

@@ -10670,7 +10670,7 @@ in
   gsettings-qt = libsForQt5.callPackage ../development/libraries/gsettings-qt { };
 
   gst_all_1 = recurseIntoAttrs(callPackage ../development/libraries/gstreamer {
-    callPackage = newScope { libav = pkgs.ffmpeg; };
+    callPackage = newScope { libav = pkgs.ffmpeg_4; };
   });
 
   gstreamer = callPackage ../development/libraries/gstreamer/legacy/gstreamer { };