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Playing Mp3 help

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basavaraj P

Playing Mp3 help

Hello,

Following is code which plays mp3 using playbin

/* set up */
play = gst_element_factory_make ("playbin2", "play");
g_object_set (G_OBJECT (play), "uri", "file:///home/basavaraj/Music/JabSeTereNaina.mp3", NULL);

bus = gst_pipeline_get_bus (GST_PIPELINE (play));
// gst_bus_add_watch (bus, my_bus_callback, loop);
gst_object_unref (bus);

gst_element_set_state (play, GST_STATE_PLAYING);

Following is code which does not play mp3. Please help me what all plugins we need to connect and
how to find their capabilities

/* Create gstreamer elements */
GstElement* pipeline = gst_pipeline_new ("audio-player");
GstElement* source   = gst_element_factory_make ("filesrc",       "file-source");
GstElement* demuxer = gst_element_factory_make ("mpegdemux2",      "mpeg-demuxer");
GstElement* decoder = gst_element_factory_make ("flump3dec",     "fluendo-decoder");
// GstElement* decoder = gst_element_factory_make("decodebin", "decoderbin");
GstElement* conv     = gst_element_factory_make ("audioconvert", "converter");
GstElement* sink     = gst_element_factory_make ("autoaudiosink", "audio-output");

if (!pipeline || !source || !demuxer || !decoder || !conv || !sink) {
    g_printerr ("One element could not be created. Exiting.\n");
    return -1;
}

/* Set up the pipeline */

/* we set the input filename to the source element */
// g_object_set (G_OBJECT (source), "uri", "file:///home/basavaraj/Music/Jab.mp3", NULL);
g_object_set (G_OBJECT (source), "location", "/home/basavaraj/Music/Jab.mp3", NULL);

/* we add a message handler */
GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_call, loop);
gst_object_unref (bus);

/* we add all elements into the pipeline */
/* file-source | mp3-demuxer | mp3-decoder | converter | alsa-output */
gst_bin_add_many (GST_BIN (pipeline),
                    source, demuxer, decoder, conv, sink, NULL);

/* we link the elements together */
/* file-source -> mp3-demuxer ~> mp3-decoder -> converter -> alsa-output */
gst_element_link (source, demuxer);
g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder);

/* Set the pipeline to "playing" state*/
g_print ("Now playing: %s\n", argv[1]);
gst_element_set_state (pipeline, GST_STATE_PLAYING);

Thanks in advance,

Basavaraj

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Tiago Katcipis

Re: Playing Mp3 help

It would be easier if you show your on_pad_added function, and if you tell exactly what error messages do you get when you run your application.

To investigate the capabilities of a element you can use gst-inspect.

On a terminal you can type for example:
gst-inspect flump3dec

it will give an complete specification of the flump3dec element.

best regards,
Katcipis

On Thu, Nov 19, 2009 at 6:40 AM, basavaraj P <[hidden email]> wrote:

Hello,

Following is code which plays mp3 using playbin

/* set up */
play = gst_element_factory_make ("playbin2", "play");
g_object_set (G_OBJECT (play), "uri", "file:///home/basavaraj/Music/JabSeTereNaina.mp3", NULL);

bus = gst_pipeline_get_bus (GST_PIPELINE (play));
// gst_bus_add_watch (bus, my_bus_callback, loop);
gst_object_unref (bus);

gst_element_set_state (play, GST_STATE_PLAYING);

Following is code which does not play mp3. Please help me what all plugins we need to connect and
how to find their capabilities

/* Create gstreamer elements */
GstElement* pipeline = gst_pipeline_new ("audio-player");
GstElement* source   = gst_element_factory_make ("filesrc",       "file-source");
GstElement* demuxer = gst_element_factory_make ("mpegdemux2",      "mpeg-demuxer");
GstElement* decoder = gst_element_factory_make ("flump3dec",     "fluendo-decoder");
// GstElement* decoder = gst_element_factory_make("decodebin", "decoderbin");
GstElement* conv     = gst_element_factory_make ("audioconvert", "converter");
GstElement* sink     = gst_element_factory_make ("autoaudiosink", "audio-output");

if (!pipeline || !source || !demuxer || !decoder || !conv || !sink) {
    g_printerr ("One element could not be created. Exiting.\n");
    return -1;
}

/* Set up the pipeline */

/* we set the input filename to the source element */
// g_object_set (G_OBJECT (source), "uri", "file:///home/basavaraj/Music/Jab.mp3", NULL);
g_object_set (G_OBJECT (source), "location", "/home/basavaraj/Music/Jab.mp3", NULL);

/* we add a message handler */
GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_call, loop);
gst_object_unref (bus);

/* we add all elements into the pipeline */
/* file-source | mp3-demuxer | mp3-decoder | converter | alsa-output */
gst_bin_add_many (GST_BIN (pipeline),
                    source, demuxer, decoder, conv, sink, NULL);

/* we link the elements together */
/* file-source -> mp3-demuxer ~> mp3-decoder -> converter -> alsa-output */
gst_element_link (source, demuxer);
g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder);

/* Set the pipeline to "playing" state*/
g_print ("Now playing: %s\n", argv[1]);
gst_element_set_state (pipeline, GST_STATE_PLAYING);

Thanks in advance,
Basavaraj

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Shivaprasad P

difference b/w pause and running state

In reply to this post by basavaraj P

Hi,

May I know some more difference b/w pause and running state, other then mentioned in GStreamer Application Development Manual (0.10.23.1).

Regards

Shiv

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Lukas Ruetz

Re: Playing Mp3 help

In reply to this post by Tiago Katcipis

Hi,

Am Donnerstag, den 19.11.2009, 07:41 -0200 schrieb Tiago Katcipis:

> It would be easier if you show your on_pad_added function, and if you
> tell exactly what error messages do you get when you run your
> application.
>
> To investigate the capabilities of a element you can use gst-inspect.
>
> On a terminal you can type for example:
> gst-inspect flump3dec
>
> it will give an complete specification of the flump3dec element.
>
> best regards,
> Katcipis
>
> On Thu, Nov 19, 2009 at 6:40 AM, basavaraj P <[hidden email]>
> wrote:
> Hello,
>
> Following is code which plays mp3 using playbin
>
> /* set up */
> play = gst_element_factory_make ("playbin2", "play");
> g_object_set (G_OBJECT (play), "uri",
> "file:///home/basavaraj/Music/JabSeTereNaina.mp3", NULL);
>
> bus = gst_pipeline_get_bus (GST_PIPELINE (play));
> // gst_bus_add_watch (bus, my_bus_callback, loop);
> gst_object_unref (bus);
>
> gst_element_set_state (play, GST_STATE_PLAYING);
>
>
> Following is code which does not play mp3. Please help me what
> all plugins we need to connect and
> how to find their capabilities
>
> /* Create gstreamer elements */
> GstElement* pipeline = gst_pipeline_new ("audio-player");
> GstElement* source = gst_element_factory_make ("filesrc",
> "file-source");
> GstElement* demuxer = gst_element_factory_make
> ("mpegdemux2", "mpeg-demuxer");
> GstElement* decoder = gst_element_factory_make
> ("flump3dec", "fluendo-decoder");
> // GstElement* decoder =
> gst_element_factory_make("decodebin", "decoderbin");
> GstElement* conv = gst_element_factory_make
> ("audioconvert", "converter");
> GstElement* sink = gst_element_factory_make
> ("autoaudiosink", "audio-output");
>
> if (!pipeline || !source || !demuxer || !decoder || !conv
> || !sink) {
> g_printerr ("One element could not be created.
> Exiting.\n");
> return -1;
> }
>
> /* Set up the pipeline */
>
> /* we set the input filename to the source element */
> // g_object_set (G_OBJECT (source), "uri",
> "file:///home/basavaraj/Music/Jab.mp3", NULL);
> g_object_set (G_OBJECT (source), "location",
> "/home/basavaraj/Music/Jab.mp3", NULL);
>
> /* we add a message handler */
> GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE
> (pipeline));
> gst_bus_add_watch (bus, bus_call, loop);
> gst_object_unref (bus);
>
> /* we add all elements into the pipeline */
> /* file-source | mp3-demuxer | mp3-decoder | converter |
> alsa-output */
> gst_bin_add_many (GST_BIN (pipeline),
> source, demuxer, decoder, conv, sink,
> NULL);
>
> /* we link the elements together */
> /* file-source -> mp3-demuxer ~> mp3-decoder -> converter ->
> alsa-output */
> gst_element_link (source, demuxer);
> g_signal_connect (demuxer, "pad-added", G_CALLBACK
> (on_pad_added), decoder);
>
> /* Set the pipeline to "playing" state*/
> g_print ("Now playing: %s\n", argv[1]);
> gst_element_set_state (pipeline, GST_STATE_PLAYING);
>
>
> Thanks in advance,
> Basavaraj

Try this pipeline to play mp3s. Because it's audio-only (beside
mp3-tags) you don't need a demuxer.

gst-launch-0.10 -v filesrc location=song.mp3 ! mp3parse ! flump3dec !
audioconvert ! audioresample ! autoaudiosink

hth,
lukas

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Jyoti-2

Re: Playing Mp3 help

Case 1:
The below pipeline should play any mp3 file.

gst-launch -v filesrc location=song.mp3 ! mad ! audioconvert ! audioresample ! autoaudiosink

Case 2:
And optionally if the file has id3 tags then use

gst-launch -v filesrc location=song.mp3 ! id3demux ! mad ! audioconvert ! audioresample ! autoaudiosink

You need to additional install mad(mp3 decoder).

Only in case 2 you need to have the callback for "pad-added" signal. Check out the helloworld example and similar
from manual.

On Thu, Nov 19, 2009 at 4:14 PM, Lukas Ruetz <[hidden email]> wrote:

Hi,

Am Donnerstag, den 19.11.2009, 07:41 -0200 schrieb Tiago Katcipis:

> It would be easier if you show your on_pad_added function, and if you
> tell exactly what error messages do you get when you run your
> application.
>
> To investigate the capabilities of a element you can use gst-inspect.
>
> On a terminal you can type for example:
> gst-inspect flump3dec
>
> it will give an complete specification of the flump3dec element.
>
> best regards,
> Katcipis
>
> On Thu, Nov 19, 2009 at 6:40 AM, basavaraj P <[hidden email]>
> wrote:
> Hello,
>
> Following is code which plays mp3 using playbin
>
> /* set up */
> play = gst_element_factory_make ("playbin2", "play");
> g_object_set (G_OBJECT (play), "uri",
> "file:///home/basavaraj/Music/JabSeTereNaina.mp3", NULL);
>
> bus = gst_pipeline_get_bus (GST_PIPELINE (play));
> // gst_bus_add_watch (bus, my_bus_callback, loop);
> gst_object_unref (bus);
>
> gst_element_set_state (play, GST_STATE_PLAYING);
>
>
> Following is code which does not play mp3. Please help me what
> all plugins we need to connect and
> how to find their capabilities
>
> /* Create gstreamer elements */
> GstElement* pipeline = gst_pipeline_new ("audio-player");
> GstElement* source = gst_element_factory_make ("filesrc",
> "file-source");
> GstElement* demuxer = gst_element_factory_make
> ("mpegdemux2", "mpeg-demuxer");
> GstElement* decoder = gst_element_factory_make
> ("flump3dec", "fluendo-decoder");
> // GstElement* decoder =
> gst_element_factory_make("decodebin", "decoderbin");
> GstElement* conv = gst_element_factory_make
> ("audioconvert", "converter");
> GstElement* sink = gst_element_factory_make
> ("autoaudiosink", "audio-output");
>
> if (!pipeline || !source || !demuxer || !decoder || !conv
> || !sink) {
> g_printerr ("One element could not be created.
> Exiting.\n");
> return -1;
> }
>
> /* Set up the pipeline */
>
> /* we set the input filename to the source element */
> // g_object_set (G_OBJECT (source), "uri",
> "file:///home/basavaraj/Music/Jab.mp3", NULL);
> g_object_set (G_OBJECT (source), "location",
> "/home/basavaraj/Music/Jab.mp3", NULL);
>
> /* we add a message handler */
> GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE
> (pipeline));
> gst_bus_add_watch (bus, bus_call, loop);
> gst_object_unref (bus);
>
> /* we add all elements into the pipeline */
> /* file-source | mp3-demuxer | mp3-decoder | converter |
> alsa-output */
> gst_bin_add_many (GST_BIN (pipeline),
> source, demuxer, decoder, conv, sink,
> NULL);
>
> /* we link the elements together */
> /* file-source -> mp3-demuxer ~> mp3-decoder -> converter ->
> alsa-output */
> gst_element_link (source, demuxer);
> g_signal_connect (demuxer, "pad-added", G_CALLBACK
> (on_pad_added), decoder);
>
> /* Set the pipeline to "playing" state*/
> g_print ("Now playing: %s\n", argv[1]);
> gst_element_set_state (pipeline, GST_STATE_PLAYING);
>
>
> Thanks in advance,
> Basavaraj

Try this pipeline to play mp3s. Because it's audio-only (beside
mp3-tags) you don't need a demuxer.

gst-launch-0.10 -v filesrc location=song.mp3 ! mp3parse ! flump3dec !
audioconvert ! audioresample ! autoaudiosink

hth,
lukas

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basavaraj P

Re: Playing Mp3 help

In reply to this post by Tiago Katcipis

Hello Katcipis,

Following is the on_pad_added function.

static void
on_pad_added (GstElement *element,
GstPad *pad,
gpointer data)
{
GstPad *sinkpad;
GstElement *decoder = (GstElement *) data;

/* We can now link this pad with the mp3-decoder sink pad */
g_print ("Dynamic pad created, linking demuxer/decoder\n");

sinkpad = gst_element_get_static_pad (decoder, "sink");

gst_pad_link (pad, sinkpad);

gst_object_unref (sinkpad);
}

Thanks,
Basavaraj

On Thu, Nov 19, 2009 at 3:11 PM, Tiago Katcipis <[hidden email]> wrote:

It would be easier if you show your on_pad_added function, and if you tell exactly what error messages do you get when you run your application.

To investigate the capabilities of a element you can use gst-inspect.

On a terminal you can type for example:
gst-inspect flump3dec

it will give an complete specification of the flump3dec element.

best regards,
Katcipis

On Thu, Nov 19, 2009 at 6:40 AM, basavaraj P <[hidden email]> wrote:

Hello,

Following is code which plays mp3 using playbin

/* set up */
play = gst_element_factory_make ("playbin2", "play");
g_object_set (G_OBJECT (play), "uri", "file:///home/basavaraj/Music/JabSeTereNaina.mp3", NULL);

bus = gst_pipeline_get_bus (GST_PIPELINE (play));
// gst_bus_add_watch (bus, my_bus_callback, loop);
gst_object_unref (bus);

gst_element_set_state (play, GST_STATE_PLAYING);

Following is code which does not play mp3. Please help me what all plugins we need to connect and
how to find their capabilities

/* Create gstreamer elements */
GstElement* pipeline = gst_pipeline_new ("audio-player");
GstElement* source   = gst_element_factory_make ("filesrc",       "file-source");
GstElement* demuxer = gst_element_factory_make ("mpegdemux2",      "mpeg-demuxer");
GstElement* decoder = gst_element_factory_make ("flump3dec",     "fluendo-decoder");
// GstElement* decoder = gst_element_factory_make("decodebin", "decoderbin");
GstElement* conv     = gst_element_factory_make ("audioconvert", "converter");
GstElement* sink     = gst_element_factory_make ("autoaudiosink", "audio-output");

if (!pipeline || !source || !demuxer || !decoder || !conv || !sink) {
    g_printerr ("One element could not be created. Exiting.\n");
    return -1;
}

/* Set up the pipeline */

/* we set the input filename to the source element */
// g_object_set (G_OBJECT (source), "uri", "file:///home/basavaraj/Music/Jab.mp3", NULL);
g_object_set (G_OBJECT (source), "location", "/home/basavaraj/Music/Jab.mp3", NULL);

/* we add a message handler */
GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_call, loop);
gst_object_unref (bus);

/* we add all elements into the pipeline */
/* file-source | mp3-demuxer | mp3-decoder | converter | alsa-output */
gst_bin_add_many (GST_BIN (pipeline),
                    source, demuxer, decoder, conv, sink, NULL);

/* we link the elements together */
/* file-source -> mp3-demuxer ~> mp3-decoder -> converter -> alsa-output */
gst_element_link (source, demuxer);
g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder);

/* Set the pipeline to "playing" state*/
g_print ("Now playing: %s\n", argv[1]);
gst_element_set_state (pipeline, GST_STATE_PLAYING);

Thanks in advance,
Basavaraj

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basavaraj P

Re: Playing Mp3 help

In reply to this post by Lukas Ruetz

Hello Lucas,

I get following error, if I try

gst-launch-0.10 -v filesrc location=song.mp3 ! mp3parse ! flump3dec !
audioconvert ! audioresample ! autoaudiosink

Error
WARNING: erroneous pipeline: no element "mp3parse"

Thanks,
Basavaraj

On Thu, Nov 19, 2009 at 4:14 PM, Lukas Ruetz <[hidden email]> wrote:

Hi,

Am Donnerstag, den 19.11.2009, 07:41 -0200 schrieb Tiago Katcipis:

> It would be easier if you show your on_pad_added function, and if you
> tell exactly what error messages do you get when you run your
> application.
>
> To investigate the capabilities of a element you can use gst-inspect.
>
> On a terminal you can type for example:
> gst-inspect flump3dec
>
> it will give an complete specification of the flump3dec element.
>
> best regards,
> Katcipis
>
> On Thu, Nov 19, 2009 at 6:40 AM, basavaraj P <[hidden email]>
> wrote:
> Hello,
>
> Following is code which plays mp3 using playbin
>
> /* set up */
> play = gst_element_factory_make ("playbin2", "play");
> g_object_set (G_OBJECT (play), "uri",
> "file:///home/basavaraj/Music/JabSeTereNaina.mp3", NULL);
>
> bus = gst_pipeline_get_bus (GST_PIPELINE (play));
> // gst_bus_add_watch (bus, my_bus_callback, loop);
> gst_object_unref (bus);
>
> gst_element_set_state (play, GST_STATE_PLAYING);
>
>
> Following is code which does not play mp3. Please help me what
> all plugins we need to connect and
> how to find their capabilities
>
> /* Create gstreamer elements */
> GstElement* pipeline = gst_pipeline_new ("audio-player");
> GstElement* source = gst_element_factory_make ("filesrc",
> "file-source");
> GstElement* demuxer = gst_element_factory_make
> ("mpegdemux2", "mpeg-demuxer");
> GstElement* decoder = gst_element_factory_make
> ("flump3dec", "fluendo-decoder");
> // GstElement* decoder =
> gst_element_factory_make("decodebin", "decoderbin");
> GstElement* conv = gst_element_factory_make
> ("audioconvert", "converter");
> GstElement* sink = gst_element_factory_make
> ("autoaudiosink", "audio-output");
>
> if (!pipeline || !source || !demuxer || !decoder || !conv
> || !sink) {
> g_printerr ("One element could not be created.
> Exiting.\n");
> return -1;
> }
>
> /* Set up the pipeline */
>
> /* we set the input filename to the source element */
> // g_object_set (G_OBJECT (source), "uri",
> "file:///home/basavaraj/Music/Jab.mp3", NULL);
> g_object_set (G_OBJECT (source), "location",
> "/home/basavaraj/Music/Jab.mp3", NULL);
>
> /* we add a message handler */
> GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE
> (pipeline));
> gst_bus_add_watch (bus, bus_call, loop);
> gst_object_unref (bus);
>
> /* we add all elements into the pipeline */
> /* file-source | mp3-demuxer | mp3-decoder | converter |
> alsa-output */
> gst_bin_add_many (GST_BIN (pipeline),
> source, demuxer, decoder, conv, sink,
> NULL);
>
> /* we link the elements together */
> /* file-source -> mp3-demuxer ~> mp3-decoder -> converter ->
> alsa-output */
> gst_element_link (source, demuxer);
> g_signal_connect (demuxer, "pad-added", G_CALLBACK
> (on_pad_added), decoder);
>
> /* Set the pipeline to "playing" state*/
> g_print ("Now playing: %s\n", argv[1]);
> gst_element_set_state (pipeline, GST_STATE_PLAYING);
>
>
> Thanks in advance,
> Basavaraj

Try this pipeline to play mp3s. Because it's audio-only (beside
mp3-tags) you don't need a demuxer.

gst-launch-0.10 -v filesrc location=song.mp3 ! mp3parse ! flump3dec !
audioconvert ! audioresample ! autoaudiosink

hth,
lukas

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basavaraj P

Re: Playing Mp3 help

In reply to this post by Jyoti-2

Hello Jyoti,

I get following error

gst-launch -v filesrc location=Jab.mp3 ! id3demux ! flump3dec ! audioconvert ! audioresample ! autoaudiosink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element /GstPipeline:pipeline0/GstFileSrc:filesrc0: Internal data flow error.
Additional debug info:
gstbasesrc.c(2378): gst_base_src_loop (): /GstPipeline:pipeline0/GstFileSrc:filesrc0:
streaming task paused, reason not-linked (-1)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
/GstPipeline:pipeline0/GstID3Demux:id3demux0.GstPad:src: caps = NULL
Freeing pipeline ...

Thanks,
Basavaraj

On Thu, Nov 19, 2009 at 4:36 PM, Jyoti <[hidden email]> wrote:

Case 1:
The below pipeline should play any mp3 file.

gst-launch -v filesrc location=song.mp3 ! mad ! audioconvert ! audioresample ! autoaudiosink

Case 2:
And optionally if the file has id3 tags then use

gst-launch -v filesrc location=song.mp3 ! id3demux ! mad ! audioconvert ! audioresample ! autoaudiosink

You need to additional install mad(mp3 decoder).

Only in case 2 you need to have the callback for "pad-added" signal. Check out the helloworld example and similar
from manual.

On Thu, Nov 19, 2009 at 4:14 PM, Lukas Ruetz <[hidden email]> wrote:

Hi,

Am Donnerstag, den 19.11.2009, 07:41 -0200 schrieb Tiago Katcipis:

> It would be easier if you show your on_pad_added function, and if you
> tell exactly what error messages do you get when you run your
> application.
>
> To investigate the capabilities of a element you can use gst-inspect.
>
> On a terminal you can type for example:
> gst-inspect flump3dec
>
> it will give an complete specification of the flump3dec element.
>
> best regards,
> Katcipis
>
> On Thu, Nov 19, 2009 at 6:40 AM, basavaraj P <[hidden email]>
> wrote:
> Hello,
>
> Following is code which plays mp3 using playbin
>
> /* set up */
> play = gst_element_factory_make ("playbin2", "play");
> g_object_set (G_OBJECT (play), "uri",
> "file:///home/basavaraj/Music/JabSeTereNaina.mp3", NULL);
>
> bus = gst_pipeline_get_bus (GST_PIPELINE (play));
> // gst_bus_add_watch (bus, my_bus_callback, loop);
> gst_object_unref (bus);
>
> gst_element_set_state (play, GST_STATE_PLAYING);
>
>
> Following is code which does not play mp3. Please help me what
> all plugins we need to connect and
> how to find their capabilities
>
> /* Create gstreamer elements */
> GstElement* pipeline = gst_pipeline_new ("audio-player");
> GstElement* source = gst_element_factory_make ("filesrc",
> "file-source");
> GstElement* demuxer = gst_element_factory_make
> ("mpegdemux2", "mpeg-demuxer");
> GstElement* decoder = gst_element_factory_make
> ("flump3dec", "fluendo-decoder");
> // GstElement* decoder =
> gst_element_factory_make("decodebin", "decoderbin");
> GstElement* conv = gst_element_factory_make
> ("audioconvert", "converter");
> GstElement* sink = gst_element_factory_make
> ("autoaudiosink", "audio-output");
>
> if (!pipeline || !source || !demuxer || !decoder || !conv
> || !sink) {
> g_printerr ("One element could not be created.
> Exiting.\n");
> return -1;
> }
>
> /* Set up the pipeline */
>
> /* we set the input filename to the source element */
> // g_object_set (G_OBJECT (source), "uri",
> "file:///home/basavaraj/Music/Jab.mp3", NULL);
> g_object_set (G_OBJECT (source), "location",
> "/home/basavaraj/Music/Jab.mp3", NULL);
>
> /* we add a message handler */
> GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE
> (pipeline));
> gst_bus_add_watch (bus, bus_call, loop);
> gst_object_unref (bus);
>
> /* we add all elements into the pipeline */
> /* file-source | mp3-demuxer | mp3-decoder | converter |
> alsa-output */
> gst_bin_add_many (GST_BIN (pipeline),
> source, demuxer, decoder, conv, sink,
> NULL);
>
> /* we link the elements together */
> /* file-source -> mp3-demuxer ~> mp3-decoder -> converter ->
> alsa-output */
> gst_element_link (source, demuxer);
> g_signal_connect (demuxer, "pad-added", G_CALLBACK
> (on_pad_added), decoder);
>
> /* Set the pipeline to "playing" state*/
> g_print ("Now playing: %s\n", argv[1]);
> gst_element_set_state (pipeline, GST_STATE_PLAYING);
>
>
> Thanks in advance,
> Basavaraj

Try this pipeline to play mp3s. Because it's audio-only (beside
mp3-tags) you don't need a demuxer.

gst-launch-0.10 -v filesrc location=song.mp3 ! mp3parse ! flump3dec !
audioconvert ! audioresample ! autoaudiosink

hth,
lukas

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Lukas Ruetz

Re: Playing Mp3 help

In reply to this post by basavaraj P

Hi,

Am Donnerstag, den 19.11.2009, 19:14 +0530 schrieb basavaraj P:

>
> Hello Lucas,
>
> I get following error, if I try
>
> gst-launch-0.10 -v filesrc location=song.mp3 ! mp3parse ! flump3dec !
> audioconvert ! audioresample ! autoaudiosink
>
> Error
> WARNING: erroneous pipeline: no element "mp3parse"
>
> Thanks,
> Basavaraj

(please don't top-post.)

If mp3parse is not found, you don't have gst-plugins-ugly installed.
Use the plugin-listing:
http://gstreamer.freedesktop.org/documentation/plugins.html

lukas

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Tiago Katcipis

Re: Playing Mp3 help

In reply to this post by basavaraj P

Basavaraj,
seeing your on_pad_added function it sens that you never connect the decoder on the convert, and never connect the convert on the sink. The following is missing after you connect the signal:

/* we link the elements together */
/* file-source -> mp3-demuxer ~> mp3-decoder -> converter -> alsa-output */
gst_element_link (source, demuxer);
g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder);
gst_element_link (decoder, conv);
gst_element_link (conv, sink);

hope this helps you

best regards,
Katcipis

On Thu, Nov 19, 2009 at 11:40 AM, basavaraj P <[hidden email]> wrote:

Hello Katcipis,

Following is the on_pad_added function.

static void
on_pad_added (GstElement *element,
              GstPad     *pad,
              gpointer    data)
{
GstPad *sinkpad;
GstElement *decoder = (GstElement *) data;

/* We can now link this pad with the mp3-decoder sink pad */
g_print ("Dynamic pad created, linking demuxer/decoder\n");

sinkpad = gst_element_get_static_pad (decoder, "sink");

gst_pad_link (pad, sinkpad);

gst_object_unref (sinkpad);
}

Thanks,
Basavaraj

On Thu, Nov 19, 2009 at 3:11 PM, Tiago Katcipis <[hidden email]> wrote:

It would be easier if you show your on_pad_added function, and if you tell exactly what error messages do you get when you run your application.

To investigate the capabilities of a element you can use gst-inspect.

On a terminal you can type for example:
gst-inspect flump3dec

it will give an complete specification of the flump3dec element.

best regards,
Katcipis

On Thu, Nov 19, 2009 at 6:40 AM, basavaraj P <[hidden email]> wrote:

Hello,

Following is code which plays mp3 using playbin

/* set up */
play = gst_element_factory_make ("playbin2", "play");
g_object_set (G_OBJECT (play), "uri", "file:///home/basavaraj/Music/JabSeTereNaina.mp3", NULL);

bus = gst_pipeline_get_bus (GST_PIPELINE (play));
// gst_bus_add_watch (bus, my_bus_callback, loop);
gst_object_unref (bus);

gst_element_set_state (play, GST_STATE_PLAYING);

Following is code which does not play mp3. Please help me what all plugins we need to connect and
how to find their capabilities

/* Create gstreamer elements */
GstElement* pipeline = gst_pipeline_new ("audio-player");
GstElement* source   = gst_element_factory_make ("filesrc",       "file-source");
GstElement* demuxer = gst_element_factory_make ("mpegdemux2",      "mpeg-demuxer");
GstElement* decoder = gst_element_factory_make ("flump3dec",     "fluendo-decoder");
// GstElement* decoder = gst_element_factory_make("decodebin", "decoderbin");
GstElement* conv     = gst_element_factory_make ("audioconvert", "converter");
GstElement* sink     = gst_element_factory_make ("autoaudiosink", "audio-output");

if (!pipeline || !source || !demuxer || !decoder || !conv || !sink) {
    g_printerr ("One element could not be created. Exiting.\n");
    return -1;
}

/* Set up the pipeline */

/* we set the input filename to the source element */
// g_object_set (G_OBJECT (source), "uri", "file:///home/basavaraj/Music/Jab.mp3", NULL);
g_object_set (G_OBJECT (source), "location", "/home/basavaraj/Music/Jab.mp3", NULL);

/* we add a message handler */
GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_call, loop);
gst_object_unref (bus);

/* we add all elements into the pipeline */
/* file-source | mp3-demuxer | mp3-decoder | converter | alsa-output */
gst_bin_add_many (GST_BIN (pipeline),
                    source, demuxer, decoder, conv, sink, NULL);

/* we link the elements together */
/* file-source -> mp3-demuxer ~> mp3-decoder -> converter -> alsa-output */
gst_element_link (source, demuxer);
g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder);

/* Set the pipeline to "playing" state*/
g_print ("Now playing: %s\n", argv[1]);
gst_element_set_state (pipeline, GST_STATE_PLAYING);

Thanks in advance,
Basavaraj

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basavaraj P

Re: Playing Mp3 help

In reply to this post by Lukas Ruetz

On Thu, Nov 19, 2009 at 7:30 PM, Lukas Ruetz <[hidden email]> wrote:

Hi,

Am Donnerstag, den 19.11.2009, 19:14 +0530 schrieb basavaraj P:

>
> Hello Lucas,
>
> I get following error, if I try
>
> gst-launch-0.10 -v filesrc location=song.mp3 ! mp3parse ! flump3dec !
> audioconvert ! audioresample ! autoaudiosink
>
> Error
> WARNING: erroneous pipeline: no element "mp3parse"
>
> Thanks,
> Basavaraj

(please don't top-post.)

If mp3parse is not found, you don't have gst-plugins-ugly installed.
Use the plugin-listing:
http://gstreamer.freedesktop.org/documentation/plugins.html

lukas

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Thanks you Lukas,

Problem actually solved as we don;t need demuxer.
I was unnecessary using demuxer.

Thanks,
Basavaraj

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basavaraj P

Re: Playing Mp3 help

In reply to this post by Tiago Katcipis

Hello Katcipis,

Thanks for this.
It worked for me.

Thanks,
Basavaraj

On Thu, Nov 19, 2009 at 7:30 PM, Tiago Katcipis <[hidden email]> wrote:

Basavaraj,
seeing your on_pad_added function it sens that you never connect the decoder on the convert, and never connect the convert on the sink. The following is missing after you connect the signal:

/* we link the elements together */
/* file-source -> mp3-demuxer ~> mp3-decoder -> converter -> alsa-output */
gst_element_link (source, demuxer);
g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder);

gst_element_link (decoder, conv);
gst_element_link (conv, sink);

hope this helps you

best regards,
Katcipis

On Thu, Nov 19, 2009 at 11:40 AM, basavaraj P <[hidden email]> wrote:

Hello Katcipis,

Following is the on_pad_added function.

static void
on_pad_added (GstElement *element,
              GstPad     *pad,
              gpointer    data)
{
GstPad *sinkpad;
GstElement *decoder = (GstElement *) data;

/* We can now link this pad with the mp3-decoder sink pad */
g_print ("Dynamic pad created, linking demuxer/decoder\n");

sinkpad = gst_element_get_static_pad (decoder, "sink");

gst_pad_link (pad, sinkpad);

gst_object_unref (sinkpad);
}

Thanks,
Basavaraj

On Thu, Nov 19, 2009 at 3:11 PM, Tiago Katcipis <[hidden email]> wrote:

It would be easier if you show your on_pad_added function, and if you tell exactly what error messages do you get when you run your application.

To investigate the capabilities of a element you can use gst-inspect.

On a terminal you can type for example:
gst-inspect flump3dec

it will give an complete specification of the flump3dec element.

best regards,
Katcipis

On Thu, Nov 19, 2009 at 6:40 AM, basavaraj P <[hidden email]> wrote:

Hello,

Following is code which plays mp3 using playbin

/* set up */
play = gst_element_factory_make ("playbin2", "play");
g_object_set (G_OBJECT (play), "uri", "file:///home/basavaraj/Music/JabSeTereNaina.mp3", NULL);

bus = gst_pipeline_get_bus (GST_PIPELINE (play));
// gst_bus_add_watch (bus, my_bus_callback, loop);
gst_object_unref (bus);

gst_element_set_state (play, GST_STATE_PLAYING);

Following is code which does not play mp3. Please help me what all plugins we need to connect and
how to find their capabilities

/* Create gstreamer elements */
GstElement* pipeline = gst_pipeline_new ("audio-player");
GstElement* source   = gst_element_factory_make ("filesrc",       "file-source");
GstElement* demuxer = gst_element_factory_make ("mpegdemux2",      "mpeg-demuxer");
GstElement* decoder = gst_element_factory_make ("flump3dec",     "fluendo-decoder");
// GstElement* decoder = gst_element_factory_make("decodebin", "decoderbin");
GstElement* conv     = gst_element_factory_make ("audioconvert", "converter");
GstElement* sink     = gst_element_factory_make ("autoaudiosink", "audio-output");

if (!pipeline || !source || !demuxer || !decoder || !conv || !sink) {
    g_printerr ("One element could not be created. Exiting.\n");
    return -1;
}

/* Set up the pipeline */

/* we set the input filename to the source element */
// g_object_set (G_OBJECT (source), "uri", "file:///home/basavaraj/Music/Jab.mp3", NULL);
g_object_set (G_OBJECT (source), "location", "/home/basavaraj/Music/Jab.mp3", NULL);

/* we add a message handler */
GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_call, loop);
gst_object_unref (bus);

/* we add all elements into the pipeline */
/* file-source | mp3-demuxer | mp3-decoder | converter | alsa-output */
gst_bin_add_many (GST_BIN (pipeline),
                    source, demuxer, decoder, conv, sink, NULL);

/* we link the elements together */
/* file-source -> mp3-demuxer ~> mp3-decoder -> converter -> alsa-output */
gst_element_link (source, demuxer);
g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder);

/* Set the pipeline to "playing" state*/
g_print ("Now playing: %s\n", argv[1]);
gst_element_set_state (pipeline, GST_STATE_PLAYING);

Thanks in advance,
Basavaraj

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