<html> <head> <style></style></head> <body class='hmmessage'><div dir='ltr'> hi everyone, <div> </div><div> </div><div>I am Andol, currently a phd in huddersfield university in UK. The project I am about to do is about implementing opencv-based hand gesture recognition functions in a gstreamer plugin. my nick name in IRC is andol, my blog is  <a href="http://www.andol.info/">http://www.andol.info/</a> , and the repository I am going to host my codes is github  <a href="https://github.com/yandol/gstreamer-hand-recognition">https://github.com/yandol/gstreamer-hand-recognition</a></div><div>I wish my work could provide some interesting features to gstreamer in terms of multimedia interactions .</div><div>looking forward to working with you guys.</div><div> </div><div> </div><div>cheers</div><div> </div><div> </div><div>Andol </div><div> <div>===</div>yandol@hotmail.com<div>http://www.andol.info</div> <div><div id="SkyDrivePlaceholder"></div>> From: gstreamer-devel-request@lists.freedesktop.org > Subject: gstreamer-devel Digest, Vol 15, Issue 56 > To: gstreamer-devel@lists.freedesktop.org > Date: Tue, 24 Apr 2012 09:12:41 -0700 > > Send gstreamer-devel mailing list submissions to > gstreamer-devel@lists.freedesktop.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > or, via email, send a message with subject or body 'help' to > gstreamer-devel-request@lists.freedesktop.org > > You can reach the person managing the list at > gstreamer-devel-owner@lists.freedesktop.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of gstreamer-devel digest..." > > > Today's Topics: > > 1. GSoC students welcome (Stefan Sauer) > 2. Re: Audio Metadata (Stefan Sauer) > 3. Re: GSoC students welcome (Peteris Krisjanis) > 4. wavparser not negotiate with my plugin (rajashekar) > 5. Re: Audio Metadata (Sree Gowri) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 24 Apr 2012 14:13:05 +0200 > From: Stefan Sauer <ensonic@hora-obscura.de> > Subject: GSoC students welcome > To: gstreamer-devel <gstreamer-devel@lists.freedesktop.org> > Message-ID: <4F9698D1.1060401@hora-obscura.de> > Content-Type: text/plain; charset=ISO-8859-1 > > Hi, > > this year we have 8 students working on various topics during the Google > summer of code program. Welcome from the gstreamer community. I'd like > to ask the students to introduce them self (just reply to this mail). > Please tell a little about the work you are going to do, what your > nickname in IRC is, where you have your blog and where you will host > your code (e.g. github). > > Happy hacking! > > Stefan > > > ------------------------------ > > Message: 2 > Date: Tue, 24 Apr 2012 14:16:16 +0200 > From: Stefan Sauer <ensonic@hora-obscura.de> > Subject: Re: Audio Metadata > To: gstreamer-devel@lists.freedesktop.org > Message-ID: <4F969990.5090001@hora-obscura.de> > Content-Type: text/plain; charset="iso-8859-1" > > On 04/24/2012 11:18 AM, Sree Gowri wrote: > > > > > > On Mon, Apr 16, 2012 at 12:53 AM, Stefan Sauer > > <ensonic@hora-obscura.de <mailto:ensonic@hora-obscura.de>> wrote: > > > > On 04/12/2012 06:23 AM, Sree Gowri wrote: > >> Hi, > >> > >> I am trying to extract audio metadata like > >> streamurl,streamtitle,artist,genre,album.However I am not able to > >> extract the metadata using GstTagList. Below is the snippet of > >> the code. Does anyone suggest what are the additions to be done > >> in order to extract the metadata? > >> > >> Only the following data has been extracted. > >> layer: 3 > >> mode: joint > >> emphasis: none > >> audio codec: MPEG-1 layer 3 > >> bitrate: 128000 > >> > >> Pipeline is as follows: > >> > >> [code] > >> app->pipeline= gst_parse_launch("appsrc name=mysource ! > >> audio/mpeg ! mad ! alsasink", NULL); > >> [/code] > > "appsrc name=mysource ! audio/mpeg ! mp3parse ! mad ! alsasink" > > or even better > > "appsrc name=mysource ! audio/mpeg ! decodebin2! alsasink" > > > > Stefan > > > >> > >> Audio data fed to the appsrc element > >> > >> [code] > >> buf =( GstBuffer *) gst_app_buffer_new (data, READBUF, g_free, data); > >> g_signal_emit_by_name (GST_APP_SRC (app->appsrc), "push-buffer", > >> buf, &ret); > >> [/code] > >> > >> Bus message > >> > >> [code] > >> case GST_MESSAGE_TAG: > >> { > >> GstTagList *tags = NULL; > >> char *artist; > >> gst_message_parse_tag (message, &tags); > >> g_print ("Got tags from element %s:\n", GST_OBJECT_NAME > >> (message->src)); > >> if (gst_tag_list_get_string (tags, GST_TAG_ARTIST, &artist)) > >> { > >> printf("got artist: %s\n",artist); > >> } > >> else > >> { > >> printf("no artist!! \n"); > >> } > >> gst_tag_list_foreach (tags, print_tag, NULL); > >> g_print ("\n"); > >> gst_tag_list_free (tags); > >> break; > >> [/code] > >> > >> print_tag function code > >> [code] > >> static void print_tag (const GstTagList * list, const gchar * > >> tag, gpointer unused) > >> { > >> gint i, count; > >> count = gst_tag_list_get_tag_size (list, tag); > >> for (i = 0; i < count; i++) { > >> gchar *str; > >> if (gst_tag_get_type (tag) == G_TYPE_STRING) { > >> if (!gst_tag_list_get_string_index (list, tag, i, &str)) > >> g_assert_not_reached (); > >> > >> } else { > >> str = > >> g_strdup_value_contents (gst_tag_list_get_value_index > >> (list, tag, i)); > >> } > >> if (i == 0) { > >> g_print (" %15s: %s\n", gst_tag_get_nick (tag), str); > >> } else { > >> g_print (" : %s\n", str); > >> } > >> g_free (str); > >> } > >> } > >> [/code] > >> > >> Thanks and Regards, > >> Sree Gowri > > > > Hi stephan, > > > > First would like to thank you for the input you provided. > > > > I tried both the pipelines that you have mentioned,however meta > > data has not been extracted. > > > > Kindly request you to let me know if there are any other changes > > that needs to be done. > > Are you sure the stream you are looking at is tagged with such metadata? > Try gst-launch-0.10 -t playbin2 uri=... > > Stefan > > > > > Regards, > > Sree Gowri > > > > > >> > >> _______________________________________________ > >> gstreamer-devel mailing list > >> gstreamer-devel@lists.freedesktop.org <mailto:gstreamer-devel@lists.freedesktop.org> > >> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > > > > > > _______________________________________________ > > gstreamer-devel mailing list > > gstreamer-devel@lists.freedesktop.org > > <mailto:gstreamer-devel@lists.freedesktop.org> > > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > > > > > > > > _______________________________________________ > > gstreamer-devel mailing list > > gstreamer-devel@lists.freedesktop.org > > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20120424/9546a42b/attachment-0001.html> > > ------------------------------ > > Message: 3 > Date: Tue, 24 Apr 2012 17:04:59 +0300 > From: Peteris Krisjanis <pecisk@gmail.com> > Subject: Re: GSoC students welcome > To: Stefan Sauer <ensonic@hora-obscura.de> > Cc: gstreamer-devel <gstreamer-devel@lists.freedesktop.org> > Message-ID: <1335276299.9959.30.camel@pecisk.vsaa.lv> > Content-Type: text/plain; charset="UTF-8" > > Hi everyone! > > I'm Peteris Krisjanis, student from University of Latvia. I will > implement Gstreamer based waveform widget, which could be used then by > other applications to show waveform data. I plan to support caching for > faster waveform redrawing, and to allow customisation, like having > different wavform styles and adding overlays as cursors, fade points, > etc. > > My nick at freenode IRC (and elsewhere) is pecisk, my blog is > pecisk.blogspot.com, and I plan to host my code in github > https://github.com/Pecisk/waveformwidget. > > See ya, > Peter. > > O , 2012-04-24 14:13 +0200, Stefan Sauer rakst?ja: > Hi, > > > > this year we have 8 students working on various topics during the > Google > > summer of code program. Welcome from the gstreamer community. I'd like > > to ask the students to introduce them self (just reply to this mail). > > Please tell a little about the work you are going to do, what your > > nickname in IRC is, where you have your blog and where you will host > > your code (e.g. github). > > > > Happy hacking! > > > > Stefan > > > > > > ------------------------------ > > Message: 4 > Date: Tue, 24 Apr 2012 07:37:22 -0700 (PDT) > From: rajashekar <rajashekar.alusa@gmail.com> > Subject: wavparser not negotiate with my plugin > To: gstreamer-devel@lists.freedesktop.org > Message-ID: <1335278242961-4583694.post@n4.nabble.com> > Content-Type: text/plain; charset=us-ascii > > hi all, > i wrote a plugin name my_plugin, it just push the buffer's to soruce pad > whatever it receives on sinkpad. > > the capabilities of source pad & sink pad are same, i.e., > audio/x-raw-int, > signed = true, width = 16, depth = 16, rate = 8000, channels = [ 1, 2] ; > > > now pipeline is : > > gst-launch filesrc location=file.wav ! wavparse ! my_plugin ! alsasink > > then it shows error message is > > pipeline is prerolling... > error from element Gstpipeline0: /pipeline/gstwavparse : wavparse0 : > internal data flow error > Additional debug info : > gstwavparse.c(2048) : in gst_wavparse_loop : Gstpipeline0: > /pipeline/gstwavparse : wavparse0 > streaming task paused, reason not linked (-1) > ERROR : pipeline does not preroll > setting pipeline to null > > > if i change my plugin rate is 16000, then it is working fine, > what is problem, can anybody explain please. > > Advance Thanks > rajashekar > > -- > View this message in context: http://gstreamer-devel.966125.n4.nabble.com/wavparser-not-negotiate-with-my-plugin-tp4583694p4583694.html > Sent from the GStreamer-devel mailing list archive at Nabble.com. > > > ------------------------------ > > Message: 5 > Date: Tue, 24 Apr 2012 21:42:39 +0530 > From: Sree Gowri <sreegowris@gmail.com> > Subject: Re: Audio Metadata > To: gstreamer-devel@lists.freedesktop.org > Message-ID: > <CAHHUHfGyoJb8m7PAyBbxVjTH+F6FF+jbS8pvvZKU_2dcuNVS4Q@mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > On Tue, Apr 24, 2012 at 5:46 PM, Stefan Sauer <ensonic@hora-obscura.de>wrote: > > > ** > > On 04/24/2012 11:18 AM, Sree Gowri wrote: > > > > > > > > On Mon, Apr 16, 2012 at 12:53 AM, Stefan Sauer <ensonic@hora-obscura.de>wrote: > > > >> On 04/12/2012 06:23 AM, Sree Gowri wrote: > >> > >> Hi, > >> > >> I am trying to extract audio metadata like > >> streamurl,streamtitle,artist,genre,album.However I am not able to extract > >> the metadata using GstTagList. Below is the snippet of the code. Does > >> anyone suggest what are the additions to be done in order to extract the > >> metadata? > >> > >> Only the following data has been extracted. > >> layer: 3 > >> mode: joint > >> emphasis: none > >> audio codec: MPEG-1 layer 3 > >> bitrate: 128000 > >> > >> Pipeline is as follows: > >> > >> [code] > >> app->pipeline= gst_parse_launch("appsrc name=mysource ! audio/mpeg ! mad > >> ! alsasink", NULL); > >> [/code] > >> > >> "appsrc name=mysource ! audio/mpeg ! mp3parse ! mad ! alsasink" > >> or even better > >> "appsrc name=mysource ! audio/mpeg ! decodebin2 ! alsasink" > >> > >> Stefan > >> > >> > >> Audio data fed to the appsrc element > >> > >> [code] > >> buf =( GstBuffer *) gst_app_buffer_new (data, READBUF, g_free, data); > >> g_signal_emit_by_name (GST_APP_SRC (app->appsrc), "push-buffer", buf, > >> &ret); > >> [/code] > >> > >> Bus message > >> > >> [code] > >> case GST_MESSAGE_TAG: > >> { > >> GstTagList *tags = NULL; > >> char *artist; > >> gst_message_parse_tag (message, &tags); > >> g_print ("Got tags from element %s:\n", GST_OBJECT_NAME > >> (message->src)); > >> if (gst_tag_list_get_string (tags, GST_TAG_ARTIST, &artist)) > >> { > >> printf("got artist: %s\n",artist); > >> } > >> else > >> { > >> printf("no artist!! \n"); > >> } > >> gst_tag_list_foreach (tags, print_tag, NULL); > >> g_print ("\n"); > >> gst_tag_list_free (tags); > >> break; > >> [/code] > >> > >> print_tag function code > >> [code] > >> static void print_tag (const GstTagList * list, const gchar * tag, > >> gpointer unused) > >> { > >> gint i, count; > >> count = gst_tag_list_get_tag_size (list, tag); > >> for (i = 0; i < count; i++) { > >> gchar *str; > >> if (gst_tag_get_type (tag) == G_TYPE_STRING) { > >> if (!gst_tag_list_get_string_index (list, tag, i, &str)) > >> g_assert_not_reached (); > >> > >> } else { > >> str = > >> g_strdup_value_contents (gst_tag_list_get_value_index (list, > >> tag, i)); > >> } > >> if (i == 0) { > >> g_print (" %15s: %s\n", gst_tag_get_nick (tag), str); > >> } else { > >> g_print (" : %s\n", str); > >> } > >> g_free (str); > >> } > >> } > >> [/code] > >> > >> Thanks and Regards, > >> Sree Gowri > >> > >> Hi stephan, > > > > First would like to thank you for the input you provided. > > > > I tried both the pipelines that you have mentioned,however meta data > > has not been extracted. > > > > Kindly request you to let me know if there are any other changes that > > needs to be done. > > > > > > Are you sure the stream you are looking at is tagged with such metadata? > > Try gst-launch-0.10 -t playbin2 uri=... > > > > Stefan > > > > Yes the stream contains the metadata like streamTitle, streamUrl. In > order to check does the stream really has metadata, appsrc buffer is > written to a file and checked using hexedit and I can find the > metadata.Sure will try your suggestion tomorrow and update you. Thankyou. > > > > > > > > > Regards, > > Sree Gowri > > > > > >> > >> _______________________________________________ > >> gstreamer-devel mailing listgstreamer-devel@lists.freedesktop.orghttp://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > >> > >> > >> > >> _______________________________________________ > >> gstreamer-devel mailing list > >> gstreamer-devel@lists.freedesktop.org > >> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > >> > >> > > > > _______________________________________________ > > gstreamer-devel mailing listgstreamer-devel@lists.freedesktop.orghttp://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > > > > > > > > _______________________________________________ > > gstreamer-devel mailing list > > gstreamer-devel@lists.freedesktop.org > > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20120424/2efba888/attachment.htm> > > ------------------------------ > > _______________________________________________ > gstreamer-devel mailing list > gstreamer-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > > > End of gstreamer-devel Digest, Vol 15, Issue 56 > *********************************************** </div></div> </div></body> </html>