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tinyzimmer
Error: could not determine kind of name for C.GST_MESSAGE_DEVICE_CHANGED
Keep getting error:
~/work/go-gst/examples$ go run playbin/main.go
# github.com/tinyzimmer/go-gst/gst
../gst/constants.go:335:40: could not determine kind of name for C.GST_MESSAGE_DEVICE_CHANGED
../gst/constants.go:832:30: could not determine kind of name for C.GST_QUERY_BITRATE
libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libgstreamer-plugins-good1.0-dev are installed. What else do I miss?
I found that GST_MESSAGE_DEVICE_CHANGED is defined in gstmessage.h that is one of headers inclusion in gst.h.
Since gst/gst.go.h includes gst.h, it seems that your environment has not been correctly path setting for gstreamer.
In my environment, pkg-config found followings
) ✗ pkg-config --list-all | grep gst
gstreamer-player-1.0 GStreamer Player - GStreamer Player convenience library
gstreamer-video-1.0 GStreamer Video Library - Video base classes and helper functions
gstreamer-riff-1.0 GStreamer RIFF Library - RIFF helper functions
gstreamer-1.0 GStreamer - Streaming media framework
gstreamer-net-1.0 GStreamer networking library - Network-enabled GStreamer plug-ins and clocking
gstreamer-pbutils-1.0 GStreamer Base Utils Library - General utility functions
gstreamer-codecparsers-1.0 GStreamer codec parsers - Bitstream parsers for GStreamer elements
gstreamer-app-1.0 GStreamer Application Library - Helper functions and base classes for application integration
gstreamer-photography-1.0 GStreamer Photography - GStreamer Photography digital image capture library
gstreamer-audio-1.0 GStreamer Audio library - Audio helper functions and base classes
gstreamer-transcoder-1.0 GStreamer Transcoder - GStreamer Transcoder library
gstreamer-mpegts-1.0 GStreamer MPEG-TS - GStreamer MPEG-TS support
gstreamer-tag-1.0 GStreamer Tag Library - Tag base classes and helper functions
gstreamer-webrtc-1.0 GStreamer WebRTC - GStreamer WebRTC support
gstreamer-gl-prototypes-1.0 GStreamer OpenGL Plugins Libraries (OpenGL Prototypes) - Streaming media framework, OpenGL plugins libraries (OpenGL Prototypes)
gstreamer-plugins-base-1.0 GStreamer Base Plugins Libraries - Streaming media framework, base plugins libraries
gstreamer-sctp-1.0 GStreamer SCTP Library - SCTP helper functions
gstreamer-allocators-1.0 GStreamer Allocators Library - Allocators implementation
gstreamer-rtsp-1.0 GStreamer RTSP Library - RTSP base classes and helper functions
gstreamer-check-1.0 GStreamer check unit testing - Unit testing helper library for GStreamer modules
gstreamer-base-1.0 GStreamer base classes - Base classes for GStreamer elements
gstreamer-fft-1.0 GStreamer FFT Library - FFT implementation
gstreamer-plugins-bad-1.0 GStreamer Bad Plugin libraries - Streaming media framework, bad plugins libraries
gstreamer-insertbin-1.0 GStreamer Insert Bin - Bin to automatically and insertally link elements
gstreamer-sdp-1.0 GStreamer SDP Library - SDP helper functions
gstreamer-rtp-1.0 GStreamer RTP Library - RTP base classes and helper functions
gstreamer-bad-audio-1.0 GStreamer bad audio library, uninstalled - Bad audio library for GStreamer elements, Not Installed
gstreamer-gl-1.0 GStreamer OpenGL Plugins Libraries - Streaming media framework, OpenGL plugins libraries
gstreamer-controller-1.0 GStreamer controller - Dynamic parameter control for GStreamer elements
Interesting. There is no GST_MESSAGE_DEVICE_CHANGED defined in my gstmessage.h What is your version of gstreamer? Mine is default for Ubuntu 18.04
~$ gst-launch-1.0 --gst-version
GStreamer Core Library version 1.14.5
I found a comment of the macro as follow (required >= 1.16)
@GST_MESSAGE_DEVICE_CHANGED: Message indicating a #GstDevice was changed
125 * a #GstDeviceProvider (Since: 1.16)
I installed gstreamer through gst-build
- https://gitlab.freedesktop.org/gstreamer/gst-build/#gst-build
$ gst-inspect-1.0 --version
gst-inspect-1.0 version 1.18.4
GStreamer 1.18.4
Mine is default for Ubuntu 18.04
The ubuntu repos have really old versions of GStreamer. These bindings assume at least 1.16 (maybe 1.18 recently I don't remember). As a separate topic, need to find a better way to handle gstreamer versioning.
Thank you, all! I'll try to upgrade to newer version. Maybe it would be good to add to the README minimal supported version of gstreamer?
It's there, albeit it in an obscure place. At the bottom under "Contributing" with other things I'm looking for more help on:
The bindings are not structured in a way to make version matching with GStreamer easy. Basically, you need a version compatible with what the bindings were written with (>=1.16).
Should probably make that pop out more
Yes, unfortunately I skipped section "Contributing" because I have none to contribute yet. It is my first experience with golang :)
Probably will leave this open as a reminder to myself that the README needs some serious love
I updated to newer version and it looks like gstreamer 1.16 is not enough. I guess it requiers 1.18
~/work/go-gst/examples$ go run playbin/main.go
# github.com/tinyzimmer/go-gst/gst
../gst/gst_values.go:575:2: could not determine kind of name for C.gst_value_array_init
../gst/gst_values.go:633:2: could not determine kind of name for C.gst_value_list_init
~/work/go-gst/examples$ gst-launch-1.0 --version
gst-launch-1.0 version 1.16.2
GStreamer 1.16.2
Does golang support someting similar to #ifdef - #endif of C?
The go compiler doesn't have a preprocessor, so no, unfortunately.
The closest thing I could think of for accomplishing it would be build tags.
please continue a discussion at https://github.com/go-gst/go-gst (where future development of the bindings will take place), although this issue concerns very outdated versions of gstreamer, so it might not be necessary by now.
