pmt-info callback not getting invoked
Ian Davidson
id012c3076 at blueyonder.co.uk
Fri Aug 30 06:40:01 PDT 2013
It makes perfect sense to SET a property when using gst-launch to set
off a pre-determined set of actions. But I don't see the value of
trying to pass anything to gst-launch from within a plug-in - you need
the flexibility of a program (for example, a C program) which does have
the ability to interrogate properties and 'do things' dependant on the
values of those properties.
Of course, you are free to prove me wrong.
Ian
On 30/08/2013 14:20, Yogesh Tyagi wrote:
> Hi,
>
> That was an example to show how do we invoke set_property through
> gst-launch.I am concerned for get_property.
>
> Thanks,
> Yogesh
>
>
> On Fri, Aug 30, 2013 at 6:44 PM, Ian Davidson
> <id012c3076 at blueyonder.co.uk <mailto:id012c3076 at blueyonder.co.uk>> wrote:
>
> On a quick inspection - it would seem that the plug-in has a
> property 'program', but you are trying to set 'program-number'.
>
> Ian
>
>
> On 30/08/2013 13:45, Yogesh Tyagi wrote:
>> Hi,
>>
>> Yes, it is a custom plugin. Here is the output of "gst-inspect
>> mdtsdemux"
>>
>> Factory Details:
>> Long name:Transport Stream Demultiplexer
>> Class:Demuxer
>> Description:
>> Author(s):
>> Rank:none (0)
>>
>> Plugin Details:
>> Name:mdplugin
>> Description:GStreamer elements
>> Filename:/usr/lib/libgstmdplugin.so
>> Version:0.10.22.1
>> License:BSD
>> Source module:gst-md
>> Binary package:GStreamer MD Elements
>> Origin URL:
>>
>> GObject
>> +----GstObject
>> +----GstElement
>> +----MdGstElement
>> +----MdGstDemux
>>
>> Pad Templates:
>> SRC template: 'src_index'
>> Availability: Sometimes
>> Capabilities:
>> application/x-md-index
>>
>> SRC template: 'src_spts'
>> Availability: Sometimes
>> Capabilities:
>> video/mpegts
>> mpegversion: 2
>> systemstream: true
>> packetsize: [ 188, 192 ]
>>
>> SRC template: 'src_aud'
>> Availability: Sometimes
>> Capabilities:
>> audio/mpeg
>> mpegversion: { 1, 2, 4 }
>> audio/x-lpcm
>> width: { 16, 20, 24 }
>> rate: { 48000, 96000 }
>> channels: [ 1, 8 ]
>> dynamic_range: [ 0, 255 ]
>> emphasis: { false, true }
>> mute: { false, true }
>> audio/x-ac3
>> audio/x-eac3
>> audio/x-dts
>> audio/x-private-ts-lpcm
>>
>> SRC template: 'src_vid'
>> Availability: Sometimes
>> Capabilities:
>> video/mpeg
>> mpegversion: { 1, 2, 4 }
>> systemstream: false
>> video/x-h264
>> video/x-wmv
>> wmvversion: 3
>> format: WVC1
>>
>> SINK template: 'sink'
>> Availability: Always
>> Capabilities:
>> video/mpeg
>> mpegversion: 2
>> systemstream: true
>> video/mpegts
>> mpegversion: 2
>> systemstream: true
>> packetsize: [ 188, 192 ]
>>
>>
>> Element Flags:
>> no flags set
>>
>> Element Implementation:
>> Has change_state() function: md_demux_change_state
>>
>> Element has no clocking capabilities.
>> Element has no indexing capabilities.
>> Element has no URI handling capabilities.
>>
>> Pads:
>> SINK: 'sink'
>> Implementation:
>> Has chainfunc(): md_gst_element_sink_chain
>> Has custom eventfunc(): md_gst_element_sink_event
>> Has custom queryfunc(): gst_pad_query_default
>> Has custom iterintlinkfunc():
>> gst_pad_iterate_internal_links_default
>> Has setcapsfunc(): md_gst_demux_sinkpad_setcaps
>> Has acceptcapsfunc(): gst_pad_acceptcaps_default
>> Pad Template: 'sink'
>>
>> Element Properties:
>> name : The name of the object
>> flags: readable, writable
>> String. Default: null Current: "mdgstdemux0"
>> use-buffering : Permits join multiple buffers to feed
>> 32kb buffers to device
>> flags: readable, writable
>> Boolean. Default: true Current: true
>> stream-time-offset : Specifies an offset in ns to apply on
>> clock synchronization.
>> flags: readable, writable
>> Unsigned Integer64. Range: 0 -
>> 18446744073709551615 Default: 0 Current: 0
>> pids : The comma-separated list of PIDs to be
>> demuxed. Value may be base-10, or in 0xABC hex format.
>> flags: writable
>> String. Default: "-1" Write only
>> program : The program number to demux. If set
>> along with 'pids', or auto=true, this will give the demux a hint
>> as to which PMT to process. Without pids, or auto=true, this
>> will trigger conversion from MPTS to SPTS. Value may be base-10,
>> or in 0xABC hex format.
>> flags: writable
>> String. Default: "-1" Write only
>> auto : If true, demux will automatically play
>> the default Video and Audio streams
>> flags: writable
>> Boolean. Default: true Write only
>> pmt-info : GObject with properties containing
>> information from the TS PMT about the currently selected program
>> and its streams
>> flags: Object of type "MDTsPmtInfo"
>>
>> Element Signals:
>> "pad-added" : void user_function (GstElement* object,
>> GstPad* arg0,
>> gpointer user_data);
>> "pad-removed" : void user_function (GstElement* object,
>> GstPad* arg0,
>> gpointer user_data);
>> "no-more-pads" : void user_function (GstElement* object,
>> gpointer user_data);
>>
>> (gst-inspect-0.10:3870): GLib-GObject-WARNING **: invalid
>> unclassed pointer in cast to `GstPad'
>>
>> (gst-inspect-0.10:3870): GStreamer-CRITICAL **:
>> gst_element_remove_pad: assertion `GST_IS_PAD (pad)' failed
>>
>> Thanks,
>> Yogesh
>>
>>
>> On Fri, Aug 30, 2013 at 6:00 PM, Robert Krakora
>> <rob.krakora at messagenetsystems.com
>> <mailto:rob.krakora at messagenetsystems.com>> wrote:
>>
>> What is the output of "gst-inspect mdtsdemux". mdtsdemux is
>> not in plugins good, bad or ugly. Is it a custom plugin or
>> did you mean mpegtsdemux?
>>
>>
>> On Fri, Aug 30, 2013 at 8:26 AM, Yogesh Tyagi
>> <yogesh.bit2006 at gmail.com <mailto:yogesh.bit2006 at gmail.com>>
>> wrote:
>>
>> Hi,
>>
>> I am using following command line:
>> gst-launch filesrc location=mpeg2_333_mhz.ts ! mdtsdemux
>> program-number=2 name=d ! q
>> ueue ! mpeg2_viddec ! queue max-size-buffers=3 ! vidpproc
>> ! vidre
>> nd_sink d. ! queue ! audio_sink
>>
>> I am working on mdtsdemux demux plugin in which I have
>> added get_propery method to get pmt-info but I don't know
>> how do I test my implementation.
>>
>> Thanks,
>> Yogesh
>>
>>
>> On Fri, Aug 30, 2013 at 5:44 PM, Robert Krakora
>> <rob.krakora at messagenetsystems.com
>> <mailto:rob.krakora at messagenetsystems.com>> wrote:
>>
>> Hi Yogesh,
>>
>> It would help if you included the gst-launch command
>> line or a snippet of your source. At a minimum, at
>> least tell us what plugins comprise your pipeline.
>>
>> Best Regards,
>>
>> Rob Krakora
>>
>>
>> On Fri, Aug 30, 2013 at 8:09 AM, Yogesh Tyagi
>> <yogesh.bit2006 at gmail.com
>> <mailto:yogesh.bit2006 at gmail.com>> wrote:
>>
>> Can somebody help me find answer to this query?
>> How can get_property method be explicitly invoked
>> in gstreamer using some tools like gst-launch?
>>
>> Thanks,
>> Yogesh
>>
>>
>> On Tue, Aug 27, 2013 at 5:35 PM, Yogesh Tyagi
>> <yogesh.bit2006 at gmail.com
>> <mailto:yogesh.bit2006 at gmail.com>> wrote:
>>
>> Hi,
>>
>> I got to work on a gstreamer based test app
>> which plays media from http source.In this
>> application following callback has been
>> registered to receive pmt information.
>>
>> g_signal_connect(G_OBJECT(demuxer),
>> "notify::pmt-info", (GCallback)
>> demuxer_notify_pmt_info, NULL);
>>
>> When I run this application I never see
>> "demuxer_notify_pmt_info" method getting called.
>> Can somebody please let me know when this
>> callback function will be activated so that I
>> can see the pmt info of the stream.
>>
>> Is there any way to invoke get_property
>> methods of plugins like e.g set_property
>> methods can be invoked with gst-launch when
>> we pass "property-name=value" to gst-launch.
>>
>> Thanks,
>> Yogesh
>>
>>
>>
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>>
>>
>>
>> --
>>
>> Rob Krakora,
>> Senior Software Engineer
>>
>> MessageNet Systems
>> 101 E Carmel Dr, Suite 105
>> Carmel, IN 46032
>>
>> MessageNetSystems.com
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>>
>> --
>>
>> Rob Krakora,
>> Senior Software Engineer
>>
>> MessageNet Systems
>> 101 E Carmel Dr, Suite 105
>> Carmel, IN 46032
>>
>> MessageNetSystems.com
>> <http://www.messagenetcommunicationsystems.com/?utm_source=email+signature&utm_medium=email&utm_campaign=email+signature+to+homepage>
>> Rob.Krakora at MessageNetSystems.com
>> <mailto:rob.krakora at messagenetsystems.com>
>> P: 317.566.1677, 212
>> F: 317.663.0808
>>
>> For the latest news, information, and blogs, please be sure
>> to visit, follow, and like us...
>>
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>
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