Không thể chơi video Qt5 đa phương tiện ubuntu 16.04

Question

Tôi cố gắng để sử dụng lớp QMediaPlayer để chơi video, nhưng cứ bị lỗi này -

`GLib-GObject-WARNING **: cannot register existing type 'GstObject' 

GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed 

GLib-GObject-CRITICAL **: g_type_register_static: assertion 'parent_type > 0' failed 

GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed 
GStreamer-CRITICAL **: gst_pad_get_negotiated_caps: assertion 'GST_IS_PAD (pad)' failed` 

Sử dụng Qt 5.7, với ubuntu 16.04. Cài đặt qt với trình hướng dẫn cài đặt (ví dụ: không xây dựng bất cứ điều gì từ nguồn bản thân mình), đây là gói Tôi có cho GStreamer -

ii gir1.2-gstreamer-0.10      0.10.36-1.5ubuntu1       amd64  Description: GObject introspection data for the GStreamer library 
ii gir1.2-gstreamer-1.0      1.8.3-1~ubuntu0.1       amd64  GObject introspection data for the GStreamer library 
ii gstreamer-qapt        3.0.2-0ubuntu1.2        amd64  GStreamer plugin to install codecs using QApt 
ii gstreamer0.10-alsa:amd64     0.10.36-2ubuntu0.1       amd64  GStreamer plugin for ALSA 
ii gstreamer0.10-doc       0.10.36-1.5ubuntu1       all   GStreamer core documentation and manuals 
ii gstreamer0.10-ffmpeg:amd64     0.10.13-5ubuntu1~wily      amd64  FFmpeg plugin for GStreamer 
ii gstreamer0.10-ffmpeg-dbg:amd64    0.10.13-5ubuntu1~wily      amd64  FFmpeg plugin for GStreamer (debug symbols) 
ii gstreamer0.10-gconf:amd64     0.10.31-3+nmu4ubuntu2.16.04.3    amd64  GStreamer plugin for getting the sink/source information from GConf 
ii gstreamer0.10-gnomevfs:amd64    0.10.36-2ubuntu0.1       amd64  GStreamer plugin for GnomeVFS 
ii gstreamer0.10-nice:amd64     0.1.13-0ubuntu2        amd64  ICE library (GStreamer 0.10 plugin) 
ii gstreamer0.10-plugins-base:amd64   0.10.36-2ubuntu0.1       amd64  GStreamer plugins from the "base" set 
ii gstreamer0.10-plugins-base-apps    0.10.36-2ubuntu0.1       amd64  GStreamer helper programs from the "base" set 
ii gstreamer0.10-plugins-base-dbg:amd64  0.10.36-2ubuntu0.1       amd64  GStreamer plugins from the "base" set 
ii gstreamer0.10-plugins-base-doc    0.10.36-2ubuntu0.1       all   GStreamer documentation for plugins from the "base" set 
ii gstreamer0.10-plugins-good:amd64   0.10.31-3+nmu4ubuntu2.16.04.3    amd64  GStreamer plugins from the "good" set 
ii gstreamer0.10-plugins-good-dbg:amd64  0.10.31-3+nmu4ubuntu2.16.04.3    amd64  GStreamer plugins from the "good" set 
ii gstreamer0.10-plugins-good-doc    0.10.31-3+nmu4ubuntu2.16.04.3    all   GStreamer documentation for plugins from the "good" set 
ii gstreamer0.10-pulseaudio:amd64    0.10.31-3+nmu4ubuntu2.16.04.3    amd64  GStreamer plugin for PulseAudio 
ii gstreamer0.10-qapt       3.0.2-0ubuntu1.2        all   transitional dummy package 
ii gstreamer0.10-tools       0.10.36-1.5ubuntu1       amd64  Tools for use with GStreamer 
ii gstreamer0.10-x:amd64      0.10.36-2ubuntu0.1       amd64  GStreamer plugins for X11 and Pango 
ii gstreamer1.0-alsa:amd64      1.8.3-1ubuntu0.2        amd64  GStreamer plugin for ALSA 
ii gstreamer1.0-clutter-3.0     3.0.18-1          amd64  Clutter PLugin for GStreamer 1.0 
ii gstreamer1.0-fluendo-mp3:amd64    0.10.32.debian-1        amd64  Fluendo mp3 decoder GStreamer 1.0 plugin 
ii gstreamer1.0-libav:amd64     1.8.3-1ubuntu0.2        amd64  libav plugin for GStreamer 
ii gstreamer1.0-plugins-bad:amd64    1.8.3-1ubuntu0.2        amd64  GStreamer plugins from the "bad" set 
ii gstreamer1.0-plugins-bad-faad:amd64   1.8.3-1ubuntu0.2        amd64  GStreamer faad plugin from the "bad" set 
ii gstreamer1.0-plugins-bad-videoparsers:amd64 1.8.3-1ubuntu0.2        amd64  GStreamer videoparsers plugin from the "bad" set 
ii gstreamer1.0-plugins-base:amd64    1.8.3-1ubuntu0.2        amd64  GStreamer plugins from the "base" set 
ii gstreamer1.0-plugins-base-apps    1.8.3-1ubuntu0.2        amd64  GStreamer helper programs from the "base" set 
ii gstreamer1.0-plugins-good:amd64    1.8.3-1ubuntu0.4        amd64  GStreamer plugins from the "good" set 
ii gstreamer1.0-plugins-ugly:amd64    1.8.3-1ubuntu0.1        amd64  GStreamer plugins from the "ugly" set 
ii gstreamer1.0-plugins-ugly-amr:amd64   1.8.3-1ubuntu0.1        amd64  GStreamer plugins from the "ugly" set 
ii gstreamer1.0-pulseaudio:amd64    1.8.3-1ubuntu0.4        amd64  GStreamer plugin for PulseAudio 
ii gstreamer1.0-tools       1.8.3-1~ubuntu0.1       amd64  Tools for use with GStreamer 
ii gstreamer1.0-x:amd64      1.8.3-1ubuntu0.2        amd64  GStreamer plugins for X11 and Pango 
ii libgstreamer-plugins-bad1.0-0:amd64   1.8.3-1ubuntu0.2        amd64  GStreamer development files for libraries from the "bad" set 
ii libgstreamer-plugins-base0.10-0:amd64  0.10.36-2ubuntu0.1       amd64  GStreamer libraries from the "base" set 
ii libgstreamer-plugins-base1.0-0:amd64  1.8.3-1ubuntu0.2        amd64  GStreamer libraries from the "base" set 
ii libgstreamer-plugins-good1.0-0:amd64  1.8.3-1ubuntu0.4        amd64  GStreamer development files for libraries from the "good" set 
ii libgstreamer0.10-0:amd64     0.10.36-1.5ubuntu1       amd64  Core GStreamer libraries and elements 
ii libgstreamer0.10-0-dbg:amd64    0.10.36-1.5ubuntu1       amd64  Core GStreamer libraries and elements 
ii libgstreamer0.10-dev      0.10.36-1.5ubuntu1       amd64  GStreamer core development files 
ii libgstreamer1.0-0:amd64      1.8.3-1~ubuntu0.1       amd64  Core GStreamer libraries and elements 
ii libgstreamer1.0-0-dbg:amd64     1.8.3-1~ubuntu0.1       amd64  Core GStreamer libraries and elements 
ii libgstreamer1.0-dev       1.8.3-1~ubuntu0.1       amd64  GStreamer core development files 
ii libreoffice-avmedia-backend-gstreamer  1:5.1.6~rc2-0ubuntu1~xenial2     amd64  GStreamer backend for LibreOffice 
ii qtgstreamer-plugins-qt5:amd64    1.2.0-3          amd64  GStreamer plugins from QtGStreamer - Qt 5 build 

Ngoài ra, chạy gst-launch -v playbin2 uri=file://U1_Test_Test030.avi thất bại,

Setting pipeline to PAUSED ... 
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: ring-buffer-max-size = 0 
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: buffer-size = -1 
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: buffer-duration = -1 
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: use-buffering = FALSE 
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: download = FALSE 
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: uri = "file://U1_Test_Test030.avi" 
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: connection-speed = 0 
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: source = (GstGioSrc) source 
ERROR: Pipeline doesn't want to pause. 
ERROR: from element /GstURIDecodeBin:uridecodebin0/GstGioSrc:source: Could not open resource for reading. 
Additional debug info: 
gstgiosrc.c(324): gst_gio_src_get_stream(): /GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0/GstGioSrc:source: 
Could not open location file://U1_Test_Test030.avi for reading: Operation not supported 
Setting pipeline to NULL ... 
Freeing pipeline ... 

gst khởi động -0,10 phiên bản 0.10.36 GStreamer 0.10.36 https://launchpad.net/distros/ubuntu/+source/gstreamer0.10

dữ liệu ghi nhận khi sử dụng GST_DEBUG = 4 là trong (liên kết này https://pastebin.com/742JBtba)[https://pastebin.com/742JBtba]

Answer 1

Bạn đang sử dụng các styleplugins qt5?
Nếu bạn cố gắng sửa đổi biến /etc/environment override để:
QT_STYLE_OVERRIDE=gtk2

Answer 2

của nó thực sự là một cơn đau ở cổ để đối phó với các codec và Qt, Vì vậy, tôi đề nghị bạn sử dụng thư viện này nó sẽ làm cho ngày dễ dàng hơn cho bạn!

VLC-Qt

Answer 3

Nâng cấp lên Qt 5.10 giải quyết được sự cố.