Curious GStreamer bug

Hi everyone!

I have a very strange behaviour with gstreamer. Under certain
circonstances, the play method of a playbin object freeze my Gtk/Gst
applycation. This is an example of a freezing code.

======================================================
#!/usr/bin/env ruby

encoding: UTF-8

#gst-launch playbin
uri=“http://mp3.live.tv-radio.com/centpourcent/all/centpourcent-128k.mp3

require ‘gtk2’
require ‘gst’

class Player
def initialize
@playbin=Gst::ElementFactory.make(‘playbin’)
@playbin.ready
end

def stop
@playbin.stop
end

def play
@playbin.uri=‘http://mp3.live.tv-radio.com/centpourcent/all/centpourcent-128k.mp3
#@playbin.uri=‘file:///home/instable/Musique/01 - Blue Bird.mp3’
p “Going to play…”
@playbin.play
p “Playing.”
end
end

class Gui
def initialize(player)
@player=player
@bstop=Gtk::Button.new(‘Stop’)
@bstop.signal_connect(‘clicked’){@player.stop}
@bplay=Gtk::Button.new(‘Play’)
@bplay.signal_connect(‘clicked’){@player.play}
@box=Gtk::HBox.new
@box.pack_start(@bstop)
@box.pack_start(@bplay)
@window=Gtk::Window.new
@window.add(@box)
@window.show_all
@window.signal_connect(“delete_event”){Gtk_quit; true}
#@player.play
end
end

player=Player.new
gui=Gui.new(player)
#player.play
Gtk.main

Did it also freeze the program on clicking the play button on your
machine ?

I will try to explain the circonstances needed for a freeze.
The uri need to a webradio (maybe not all webradios freezes). No
freeze with loacal files.
The play method must be called from a block. No freeze if it is called
from the main code or within the Gui#initialize method.

If the uri was all ready played, the play method from a block do not
freeze the programm. (If I call player.play from main code, I can use
the stop and then the play button without freezing the programm.

Am I doing something wrong ?

Vincent

2010/3/2 vincent carmona [email protected]:

Did it also freeze the program on clicking the play button on your machine ?

No.
On debian sid :
Tested with 1.8.7, RG2 0.19.3
and 1.9.1, RG2 svn

I tried several times to stop/play, and it works ok.

Btw, Gtk_quit is undefined.

I am testing the script on sid. and it freezes!
Gtk::VERSION=[2, 18, 7], Gtk::BINDING_VERSION=[0, 19, 3]. Ruby 1.8.7

I have libgst-ruby1.8 and libgtk2-ruby1.8 packages installed but
neither ruby-gnome2, ruby-gnome2-dev nor libgnome2-ruby1.8.
Which packages do you have installed on your sid ?

aptitude search ruby | grep ^i
i A libatk1-ruby1.8 - ATK bindings for the Ruby language

i A libcairo-ruby1.8 - Cairo bindings for the Ruby
language

i A libgdk-pixbuf2-ruby1.8 - Gdk-Pixbuf 2 bindings for the Ruby
languag
i libgettext-ruby1.8 - Gettext for ruby1.8

i A libglib2-ruby1.8 - Glib 2 bindings for the Ruby
language

i libgst-ruby - GStreamer bindings for the Ruby
language
i A libgst-ruby1.8 - GStreamer bindings for the Ruby
language
i libgtk2-ruby - GTK+ bindings for the Ruby
language

i A libgtk2-ruby1.8 - GTK+ bindings for the Ruby
language

i A liblocale-ruby1.8 - pure ruby locale library

i A libpango1-ruby1.8 - Pango bindings for the Ruby
language

i A libreadline-ruby1.8 - Readline interface for Ruby 1.8

i A libreadline-ruby1.9 - Readline interface for Ruby 1.9

i A libruby - Libraries necessary to run Ruby
1.8.x

i A libruby1.8 - Libraries necessary to run Ruby
1.8

i A libruby1.9 - Libraries necessary to run Ruby
1.9

i libtagc0-ruby - TagLib Audio Meta-Data Library for
Ruby
i A libtagc0-ruby1.8 - TagLib Audio Meta-Data Library for
Ruby 1.
i ruby - Interpréteur pour le langage de
script
ori
i ruby-dev - Header files for compiling
extension
modul
i A ruby1.8 - Interpreter of object-oriented
scripting l
i A ruby1.8-dev - Header files for compiling
extension
modul
i ruby1.9

2010/3/2 vincent carmona [email protected]:

I am testing the script on sid. and it freezes!
Gtk::VERSION=[2, 18, 7], Gtk::BINDING_VERSION=[0, 19, 3]. Ruby 1.8.7
I have libgst-ruby1.8 and libgtk2-ruby1.8 packages installed but
neither ruby-gnome2, ruby-gnome2-dev nor libgnome2-ruby1.8.
Which packages do you have installed on your sid ?
aptitude search ruby | grep ^i

i A libart2-ruby - Libart 2 bindings for the Ruby
language
i A libart2-ruby1.8 - Libart 2 bindings for the Ruby
language
i A libatk1-ruby - ATK bindings for the Ruby language
i A libatk1-ruby1.8 - ATK bindings for the Ruby language
i A libcairo-ruby1.8 - Cairo bindings for the Ruby
language
i A libgconf2-ruby - GConf 2 bindings for the Ruby
language
i A libgconf2-ruby1.8 - GConf 2 bindings for the Ruby
language
i A libgdk-pixbuf2-ruby - Gdk-Pixbuf 2 bindings for the Ruby
languag
i A libgdk-pixbuf2-ruby1.8 - Gdk-Pixbuf 2 bindings for the Ruby
languag
i A libgettext-ruby-util - Gettext utilities for ruby (dummy
package)
i A libgettext-ruby1.8 - Gettext for ruby1.8
i A libglade2-ruby - Libglade 2 bindings for the Ruby
language
i A libglade2-ruby1.8 - Libglade 2 bindings for the Ruby
language
i A libglib2-ruby1.8 - Glib 2 bindings for the Ruby
language
i A libgnome2-ruby - GNOME 2 bindings for the Ruby
language
i A libgnome2-ruby1.8 - GNOME 2 bindings for the Ruby
language
i A libgnomecanvas2-ruby - GNOME Canvas 2 bindings for the
Ruby langu
i A libgnomecanvas2-ruby1.8 - GNOME Canvas 2 bindings for the
Ruby langu
i A libgnomevfs2-ruby - GNOME VFS 2 bindings for the Ruby
language
i A libgnomevfs2-ruby1.8 - GNOME VFS 2 bindings for the Ruby
language
i libgst-ruby - GStreamer bindings for the Ruby
language
i A libgst-ruby1.8 - GStreamer bindings for the Ruby
language
i libgstreamer0.10-ruby - GStreamer 0.10 bindings for the
Ruby langu
i A libgstreamer0.10-ruby1.8 - GStreamer 0.10 bindings for the
Ruby langu
i A libgtk-mozembed-ruby - ruby binding of GtkMozEmbed, gecko
rendere
i A libgtk-mozembed-ruby1.8 - ruby binding of GtkMozEmbed, gecko
rendere
i A libgtk2-ruby - GTK+ bindings for the Ruby
language
i A libgtk2-ruby1.8 - GTK+ bindings for the Ruby
language
i A libgtkglext1-ruby - GTK+ GL extension bindings for the
Ruby la
i A libgtkglext1-ruby1.8 - GTK+ GL extension bindings for the
Ruby la
i A liblocale-ruby1.8 - pure ruby locale library
i A libopengl-ruby - OpenGL binding for Ruby
i A libpanel-applet2-ruby - GNOME 2 panel applet library
bindings for
i A libpanel-applet2-ruby1.8 - GNOME 2 panel applet library
bindings for
i A libpango1-ruby - Pango bindings for the Ruby
language
i A libpango1-ruby1.8 - Pango bindings for the Ruby
language
i A libreadline-ruby1.8 - Readline interface for Ruby 1.8
i A librsvg2-ruby - RSVG renderer bindings for the
Ruby langua
i A librsvg2-ruby1.8 - RSVG renderer bindings for the
Ruby langua
i A libruby - Libraries necessary to run Ruby
1.8.x
i A libruby1.8 - Libraries necessary to run Ruby
1.8
i libsqlite3-ruby - SQLite3 interface for Ruby
i A libsqlite3-ruby1.8 - SQLite3 interface for Ruby 1.8
i libtagc0-ruby - TagLib Audio Meta-Data Library for
Ruby
i A libtagc0-ruby1.8 - TagLib Audio Meta-Data Library for
Ruby 1.
i A libvte-ruby - VTE widget bindings for the Ruby
language
i A libvte-ruby1.8 - VTE widget bindings for the Ruby
language
i A ruby - Interpréteur pour le langage de
script ori
i ruby-gnome2 - GNOME-related bindings for the
Ruby langua
i A ruby1.8 - Interpreter of object-oriented
scripting l
i ruby1.8-dev - Header files for compiling
extension modul
i rubygems - package management framework for
Ruby libr
i A rubygems1.8 - package management framework for
Ruby libr
i rubyripper - a digital audio extraction
algorithm

That’s with debian packaged 1.8.7.

I also use 1.9.1 through rvm, and ruby-gnome2-svn compiled from source.

I also have :
$ aptitude search gst | grep ^i
i A bluez-gstreamer - Bluetooth GStreamer support
i A gir1.0-gstreamer-0.10 - Description: GObject introspection
data fo
i gstreamer-tools - Tools for use with GStreamer
i A gstreamer0.10-alsa - GStreamer plugin for ALSA
i A gstreamer0.10-ffmpeg - FFmpeg plugin for GStreamer
i gstreamer0.10-gnonlin - non-linear editing module for
GStreamer
i A gstreamer0.10-nice - ICE library (GStreamer plugin)
i A gstreamer0.10-plugins-bad - GStreamer plugins from the “bad”
set
i A gstreamer0.10-plugins-base - GStreamer plugins from the “base”
set
i A gstreamer0.10-plugins-good - GStreamer plugins from the “good”
set
i A gstreamer0.10-plugins-ugly - GStreamer plugins from the “ugly”
set
i A gstreamer0.10-pulseaudio - GStreamer plugin for PulseAudio
i A gstreamer0.10-tools - Tools for use with GStreamer
i A gstreamer0.10-x - GStreamer plugins for X11 and
Pango
i libgst-ruby - GStreamer bindings for the Ruby
language
i A libgst-ruby1.8 - GStreamer bindings for the Ruby
language
i A libgstfarsight0.10-0 - Audio/Video communications
framework: core
i A libgstreamer-plugins-base0.10-0 - GStreamer libraries from the
“base” set
i libgstreamer-plugins-base0.10-d - GStreamer development files for
libraries
i A libgstreamer0.10-0 - Core GStreamer libraries and
elements
i libgstreamer0.10-dev - GStreamer core development files
i libgstreamer0.10-ruby - GStreamer 0.10 bindings for the
Ruby langu
i A libgstreamer0.10-ruby1.8 - GStreamer 0.10 bindings for the
Ruby langu
i A python-gst0.10 - generic media-playing framework
(Python bi

I also go through a squid proxy. If I disable the proxy, it freezes,
obviously.

If you need more info, tell me.

Simon

2010/3/3, Simon A. [email protected]:

I also go through a squid proxy. If I disable the proxy, it freezes,
obviously.

If you disable the proxy, GStreamer freeze cause it cannot reach the
stream anymore. Does it also freeze the gui ?

Vincent

Apparently the freeze is caused by the souphttpsrc element.
(If I replace the playbin by a simple souphttpsrc element the freeze
still occurs)

On ubuntu I use the 0.10.16-1ubuntu3 version of
gstreamer0.10-plugins-good. Simon can you post yours ?

Maybe I do not have a freeze because of your proxy.
In souphttpsrc sources, code differs whether there is a proxy or not.
http://cgit.freedesktop.org/gstreamer/gst-plugins-good/tree/ext/soup/gstsouphttpsrc.c#n1239

Maybe I should file GStremear bug.

2010/3/4, vincent carmona [email protected]:

The bug may be thread related.
If the play method of the playbin is called inside a thread the gui
does not freeze. :slight_smile:
But if I use the join method on the thread the gui freezes.
I was think at using a thread as a workaround.
Gtk and threads are not good friend. Can I just call the play method
on a thread?

I hope someone will have an idea on why that bug occurs.

require ‘gtk2’
require ‘gst’

class Player
def initialize
@playbin=Gst::ElementFactory.make(‘playbin’)
@playbin.ready
end

def stop
@playbin.stop
end

def play
#@playbin.uri=‘file:///home/instable/Musique/01 - Blue Bird.mp3’
@playbin.uri=‘http://mp3.live.tv-radio.com/centpourcent/all/centpourcent-128k.mp3
p “Going to play…”
Thread.new{@playbin.play; p “Playing.”}#.join
end
end

class Gui
def initialize(player)
@player=player
@bstop=Gtk::Button.new(‘Stop’)
@bstop.signal_connect(‘clicked’){@player.stop}
@bplay=Gtk::Button.new(‘Play’)
@bplay.signal_connect(‘clicked’){@player.play}
@box=Gtk::HBox.new
@box.pack_start(@bstop)
@box.pack_start(@bplay)
@window=Gtk::Window.new
@window.add(@box)
@window.show_all
@window.signal_connect(“delete_event”){Gtk.main_quit; true}
end
end

player=Player.new
gui=Gui.new(player)
Gtk.main

I know none of these languages. Ruby is the only one I am used to.
Python is close to ruby maybe I can translate my bug. I suppose it
have a Gtk and a Gstreamer libraries. I have not be able to reproduce
the bug with only ruby/gst.

Thanks for your precious help.

Vincent.

2010/3/4, Simon A. [email protected]:

I have test this radio with python. There is no freeze.

I am guessing that the "bug " is in ruby libraries. Maybe I should
open a bug on ruby-gnome tracker. What do you think ?

Vincent

2010/3/4, vincent carmona [email protected]:

2010/3/4 vincent carmona [email protected]:

If you disable the proxy, GStreamer freeze cause it cannot reach the
stream anymore. Does it also freeze the gui ?

Yes

On ubuntu I use the 0.10.16-1ubuntu3 version of
gstreamer0.10-plugins-good. Simon can you post yours ?

Paquet : gstreamer0.10-plugins-good
Version : 0.10.18-1

Paquet : libsoup2.4-1
Version : 2.29.91-1

You might want to test it in Python/Perl, or vala maybe.

good luck

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