* gstreamer-1.0: make gst-launch find plugins again
gst-launch and friends are in the "dev" output now.
* gstreamer-1.0: lower priority on plugins from $NIX_PROFILES
Suffix the plugin paths from $NIX_PROFILES instead of prefixing them to
$GST_PLUGIN_SYSTEM_PATH. If a program has specifically set up its plugin
path to some custom/specific version, we don't want plugins from
$NIX_PROFILES to mess things up by having higher priority.
- Explicitly moving the files breaks them, because the wrappers
reference the files by absolute path. Also this automatically
moves the manpages to $dev as well.
- Need to explicitly set --exec-prefix since the pkgconfig file has
`toolsdir=${exec_prefix}/bin`, breaking totem:
http://hydra.nixos.org/build/34980617/nixlog/1/raw
````
checking for BACKEND_TEST... yes
checking GStreamer 1.0 inspection tool... no
configure: error:
Cannot find required GStreamer-1.0 tool 'gst-inspect-1.0'.
It should be part of gstreamer-1_0-utils. Please install it.
builder for ‘/nix/store/npq2ihlsdniv4j3wbyparq9byjxqdi15-totem-3.18.1.drv’ failed with exit code 1
````
While at it, enable parallel build.
(And while at it, gst-vaapi 0.6.0 -> 0.6.1.)
* gst-editing-services grew additional build time dependencies, flex and
perl.
* gst-libav switched from libav to ffmpeg as "libav" provider, see
http://gstreamer.freedesktop.org/releases/1.6/.
Without using ffmpeg, one may hit issues such as this (which I
initially did):
(gst-plugin-scanner:19751): GStreamer-WARNING **: Failed to load plugin '/nix/store/0wgpq2yx9wrkp2mh4rn1c7zbiq2bqa2l-gst-libav-1.6.1/lib/gstreamer-1.0/libgstlibav.so':
/nix/store/0wgpq2yx9wrkp2mh4rn1c7zbiq2bqa2l-gst-libav-1.6.1/lib/gstreamer-1.0/libgstlibav.so: undefined symbol: av_frame_get_sample_rate
So that the tools become useable. The cool thing about wrapping them
like this (looping over $NIX_PROFILES) is that they will work on
non-NixOS systems too, given that $NIX_PROFILES is set correctly.
If you want the old (pure?) behaviour, just run gst-launch etc. with
empty $NIX_PROFILES.
