[Gambas-user] Fwd: [Gambas Bug Tracker] Bug #1175: On saving webcam image produced using gb.media gives error with gb.qt4

[Benoît Minisini]

-------- Message transféré --------
Sujet : [Gambas Bug Tracker] Bug #1175: On saving webcam image produced using gb.media gives error with gb.qt4
Date : Wed, 20 Sep 2017 10:32:41 GMT
De : bugtracker at ...3416...
Pour : isafiur at ...626..., g4mba5 at ...626...

http://gambaswiki.org/bugtracker/edit?object=BUG.1175&from=L21haW4-

Safiur RAHMAN reported a new bug.

Summary
-------

On saving webcam image produced using gb.media gives error with gb.qt4

Type             : Bug
Priority         : Medium
Gambas version   : Unknown
Product          : Unknown


Description
-----------

Taking example of webcam image from MediaPlayer 1.0.0 (MTest module) I get error "Unsupported Default image format" on saving image with qt4. However I don't get such error with gtk3. The script is: 

#!/usr/bin/env gbs3

Use "gb.image"
Use "gb.media"
Use "gb.qt4"
'Use "gb.gtk3"

Private $hPlayer As MediaPipeline
Private $bStop As Boolean

Public Sub Main()

  Dim hSrc As MediaControl
  Dim hFilter As MediaFilter
  Dim hSink As MediaControl
  Dim I As Integer

  $hPlayer = New MediaPipeline As "MediaPlayer"

  hSrc = New MediaControl($hPlayer, "v4l2src")
  'hSrc["norm"] = "SECAM"
  Print hSrc["norm"]

  hFilter = New MediaFilter($hPlayer)

  hSink = New MediaControl($hPlayer, "xvimagesink")

  hSrc.LinkTo(hFilter)
  hFilter.LinkTo(hSink)

  hFilter.Filter = "video/x-raw,width=640,height=480,framerate=30/1"

  $hPlayer.Play

  Print "I will take a screenshot in 5 seconds..."
  Repeat
    Wait 1
    Inc I
    If I <= 5 Then
      Print "..."; I;
      Flush
      If I = 5 Then
        Print
        hSink.GetLastImage().Save("~/screenshot.png")
        Print "Screenshot saved to '~/screenshot.png'!"
      Endif
    Endif
  Until $bStop

End


System information
------------------

[System]
Gambas=3.10
OperatingSystem=Linux
Kernel=4.4.0-93-generic
Architecture=x86_64
Distribution=Ubuntu 14.04.5 LTS
Desktop=UNITY
Theme=Gtk
Language=en_US.UTF-8
Memory=3883M

[Libraries]
Cairo=libcairo.so.2.11301.0
Curl=libcurl.so.4.3.0
DBus=libdbus-1.so.3.7.6
GStreamer=libgstreamer-0.10.so.0.30.0
GStreamer=libgstreamer-1.0.so.0.204.0
GTK+2=libgtk-x11-2.0.so.0.2400.23
GTK+3=libgtk-3.so.0.1000.8
OpenGL=libGL.so.1.2.0
Poppler=libpoppler.so.44.0.0
QT4=libQtCore.so.4.8.6
QT5=libQt5Core.so.5.2.1
SDL=libSDL-1.2.so.0.11.4
SQLite=libsqlite3.so.0.8.6

[Environment]
CLUTTER_IM_MODULE=xim
COMPIZ_BIN_PATH=/usr/bin/
COMPIZ_CONFIG_PROFILE=ubuntu
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-7lRxBKgWQ0
DEFAULTS_PATH=/usr/share/gconf/ubuntu.default.path
DESKTOP_SESSION=ubuntu
DISPLAY=:0
GB_GUI=gb.qt4
GDMSESSION=ubuntu
GDM_LANG=en_US
GIO_LAUNCHED_DESKTOP_FILE=/usr/share/applications/gambas3.desktop
GIO_LAUNCHED_DESKTOP_FILE_PID=8982
GNOME_DESKTOP_SESSION_ID=this-is-deprecated
GNOME_KEYRING_CONTROL=/run/user/1000/keyring-MvCmAV
GNOME_KEYRING_PID=2356
GPG_AGENT_INFO=/run/user/1000/keyring-MvCmAV/gpg:0:1
GTK_IM_MODULE=ibus
GTK_MODULES=overlay-scrollbar:unity-gtk-module
HOME=<home>
IM_CONFIG_PHASE=1
INSTANCE=
JOB=dbus
LANG=en_US.UTF-8
LANGUAGE=en_US
LC_ADDRESS=ne_NP
LC_IDENTIFICATION=ne_NP
LC_MEASUREMENT=ne_NP
LC_MONETARY=ne_NP
LC_NAME=ne_NP
LC_NUMERIC=ne_NP
LC_PAPER=ne_NP
LC_TELEPHONE=ne_NP
LC_TIME=ne_NP
LOGNAME=<user>
MANDATORY_PATH=/usr/share/gconf/ubuntu.mandatory.path
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
PWD=<home>
QT4_IM_MODULE=xim
QT_IM_MODULE=ibus
QT_QPA_PLATFORMTHEME=appmenu-qt5
SELINUX_INIT=YES
SESSION=ubuntu
SESSIONTYPE=gnome-session
SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/2531,unix/<hostname>:/tmp/.ICE-unix/2531
SHELL=/bin/bash
SHLVL=0
SSH_AUTH_SOCK=/run/user/1000/keyring-MvCmAV/ssh
TEXTDOMAIN=im-config
TEXTDOMAINDIR=/usr/share/locale/
TZ=:/etc/localtime
UPSTART_SESSION=unix:abstract=/com/ubuntu/upstart-session/1000/2358
USER=<user>
XAUTHORITY=<home>/.Xauthority
XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/usr/share/upstart/xdg:/etc/xdg
XDG_CURRENT_DESKTOP=Unity
XDG_DATA_DIRS=/usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop
XDG_GREETER_DATA_DIR=/var/lib/lightdm-data/<user>
XDG_MENU_PREFIX=gnome-
XDG_RUNTIME_DIR=/run/user/1000
XDG_SEAT=seat0
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
XDG_SESSION_ID=c2
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_VTNR=7
XMODIFIERS=@...3498...=ibus