Re: gstreamer-devel Digest, Vol 30, Issue 78
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Re: gstreamer-devel Digest, Vol 30, Issue 78
 
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2008/11/28 <[hidden email]>:
> Send gstreamer-devel mailing list submissions to > [hidden email] > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > or, via email, send a message with subject or body 'help' to > [hidden email] > > You can reach the person managing the list at > [hidden email] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of gstreamer-devel digest..." > > > Today's Topics: > > 1. Caps Setting (Can Bal) > 2. Re: Create a mixer software (Stefan Kost) > 3. Using OpenCV with Gstreamer (Florent) > 4. Pipeline to convert a transport stream into an AVI file > (Julien Pauty) > 5. finalize in a plugin (Zoltan Seress) > 6. Re: Lame plugin on Gstreamer (Eric Zhang) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 27 Nov 2008 14:57:25 +0200 > From: Can Bal <[hidden email]> > Subject: [gst-devel] Caps Setting > To: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Hello everybody, > > First I must say that I am new to GStreamer and try to write my first > plugin/filter. My aim is to use videotestsrc to generate a video and > filter only the random part (on the bottom right) and output only that > section to the screen. > > I know that I need to have different caps for the src and sink pads, so > that xvimagesink negotiates with my filter and decides for a lower > resolution than the resolution videotestsrc outputs. I have tried many > things to do that (including fixing the src pad caps to the resolution I > want in the template and in the _set_caps() function); but nothing works > and I simply get the same resolution with the input at my output. > > If you can give me some hints of the required steps to this, I would > really appreciate. Thank you very much. > > Best regards, > canbal > > > > ------------------------------ > > Message: 2 > Date: Thu, 27 Nov 2008 15:56:40 +0200 > From: Stefan Kost <[hidden email]> > Subject: Re: [gst-devel] Create a mixer software > To: Discussion of the development of GStreamer > <[hidden email]> > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1 > > hi chuck, > chuck berry schrieb: >> Hi, I'm developing a little mp3 player and I'm trying to implement a >> control volume by GstMixer >> >From internet I've found this code: >> >> > <snip> >> With these 2 function I can implement an hardware mixer but I want a >> software mixer. What can I do that? >> Thanks >> Bye >> > > plug a volume element before the audiosink. likewise you can use > audiopanorama for balance. by playbin and Gstmixer interface? bye > Stefan >> ------------------------------------------------------------------------- >> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge >> Build the coolest Linux based applications with Moblin SDK & win great prizes >> Grand prize is a trip for two to an Open Source event anywhere in the world >> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel >> > > > > > ------------------------------ > > Message: 3 > Date: Thu, 27 Nov 2008 20:04:19 +0100 > From: Florent <[hidden email]> > Subject: [gst-devel] Using OpenCV with Gstreamer > To: gstreamer-devel <[hidden email]> > Message-ID: > <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1 > > Hi > > I just wanted to know if there was any sample/demo app for using the > appsink-based opencv element in the opencv release ? Any help would be > appreciated. > > Thanks ! > > Florent > > > > ------------------------------ > > Message: 4 > Date: Thu, 27 Nov 2008 23:48:14 +0100 > From: "Julien Pauty" <[hidden email]> > Subject: [gst-devel] Pipeline to convert a transport stream into an > AVI file > To: "Discussion of the development of GStreamer" > <[hidden email]> > Message-ID: > <[hidden email]> > Content-Type: text/plain; charset="iso-8859-1" > > Hello, > > I'm trying to convert a file containing transport stream into a regular AVI > file. Since it's not possible (yet) to seek into a transport stream, I would > like to convert it into a format where seeking is supported. My idea was to > extract the video and audio streams and then to store them into an AVI > container. > > I made this pipeline: > gst-launch avimux name=mux ! filesink location=/tmp/test2.avi filesrc > location=257.ts ! mpegtsdemux name=demux demux.video_0078 ! mux.video_00 > demux.audio_0082 ! mux.audio_00 > > This does not work and exits with the following errors: > > D?finition du pipeline ? PAUSED... > Le pipeline est en phase de PREROLL... > ERREUR : de l'?l?ment /GstPipeline:pipeline0/GstFileSrc:filesrc0 : Internal > data stream error. > Information de d?bogage suppl?mentaire : > gstbasesrc.c(2234): gst_base_src_loop (): > /GstPipeline:pipeline0/GstFileSrc:filesrc0: > streaming task paused, reason not-negotiated (-4) > ERROR : pipeline refuse to go into setup phase > D?finition du pipeline ? NULL... > Lib?ration du pipeline (FREE)... > > (I translated the main info, rest is in french). > > I do have a pipeline that convert the file: > > gst-launch avimux name=mux ! filesink location=/tmp/test2.avi filesrc > location=257.ts ! mpegtsdemux name=demux demux.video_0078 ! queue ! > mpeg2dec ! ffmpegcolorspace ! mpeg2enc ! queue ! mux.video_00 > demux.audio_0082 ! queue ! mad ! audioconvert ! lame ! queue ! mux.audio_00 > > This one involves decoding and recoding video, which is useless since the > formats are the same. I would like to just extract streams and store them > into a different container. > > Is it possible to make such pipeline ? Using avi is not a requirement. I > just want to convert the transport stream into a format that supports > seeking well. > > Thanks for your help, > > Julien > -------------- next part -------------- > An HTML attachment was scrubbed... > > ------------------------------ > > Message: 5 > Date: Fri, 28 Nov 2008 00:00:17 +0100 > From: "Zoltan Seress" <[hidden email]> > Subject: [gst-devel] finalize in a plugin > To: "Discussion of the development of GStreamer" > <[hidden email]> > Message-ID: > <[hidden email]> > Content-Type: text/plain; charset="iso-8859-1" > > Hi Dev, > > I know that this is not really a gstreamer specific question, rather > GObject, so I read some GObject descriptions about finalize, but I would > like to ask it nevertheless. > How many times is the finalize function called during the life of a plugin? > It is called only once at the destruction of the Class as the pair of the > class_init? Is it a problem if I have some pointers as members of my > element, but I don't overwrite the finalize function? Or is it called at the > destruction of an element too? > Thanks! > > Zoltan Seress > -------------- next part -------------- > An HTML attachment was scrubbed... > > ------------------------------ > > Message: 6 > Date: Fri, 28 Nov 2008 10:09:03 +0800 > From: "Eric Zhang" <[hidden email]> > Subject: Re: [gst-devel] Lame plugin on Gstreamer > To: "Discussion of the development of GStreamer" > <[hidden email]> > Message-ID: > <[hidden email]> > Content-Type: text/plain; charset="iso-8859-1" > > Hi, gstreamer-devel: > > 1. Check whether the file /usr/lib/libmp3lame.so exists. > > 2. Check the configure options of gst-plugins-ugly. Run `./configure > --help' to check whether a option like `--enable-lame' exists. If so, add > it. > > Eric Zhang > > 2008/11/27 yang shaobo <[hidden email]> > >> Hi , I am a freshman on Gstreamer. >> I am cross compiling gstreamer on DM355( a arm926 core in it ). >> I tried to install the lame plugin to encode mp3 files. >> The version of gstreamer is >> >> glib-2.16.5.tar.gz >> gstreamer-0.10.20.tar.gz >> gst-plugins-base-0.10.20.tar.gz >> gst-plugins-good-0.10.8.tar.gz >> gst-plugins-ugly-0.10.8.tar.gz >> libid3tag-0.15.1b.tar.gz >> libmad-0.15.1b.tar.gz >> liboil-0.3.15.tar.gz >> lame-398-2.tar.gz >> >> When I intalling the gst-plugins-ugly-0.10.8 , I found the following >> messages: >> configure: *** checking feature: lame mp3 encoder library *** >> configure: *** for plug-ins: lame *** >> checking for lame_init in -lmp3lame... no >> configure: *** These plugins will not be built: lame >> Before I install the gst-plugins-ugly, I have intalled lame-398-2 . >> This problem puzzled for several weeks. >> Can someone help me ? >> >> ------------------------------------------------------------------------- >> This SF.Net email is sponsored by the Moblin Your Move Developer's >> challenge >> Build the coolest Linux based applications with Moblin SDK & win great >> prizes >> Grand prize is a trip for two to an Open Source event anywhere in the world >> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel >> > -------------- next part -------------- > An HTML attachment was scrubbed... > > ------------------------------ > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > > ------------------------------ > > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > > > End of gstreamer-devel Digest, Vol 30, Issue 78 > *********************************************** > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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chuck berry schrieb:
>> >> Date: Thu, 27 Nov 2008 15:56:40 +0200 >> From: Stefan Kost <[hidden email]> >> Subject: Re: [gst-devel] Create a mixer software >> To: Discussion of the development of GStreamer >> <[hidden email]> >> Message-ID: <[hidden email]> >> Content-Type: text/plain; charset=ISO-8859-1 >> >> hi chuck, > hi stefan >> chuck berry schrieb: >>> Hi, I'm developing a little mp3 player and I'm trying to implement a >>> control volume by GstMixer >>> >From internet I've found this code: >>> >>> >> <snip> >>> With these 2 function I can implement an hardware mixer but I want a >>> software mixer. What can I do that? >>> Thanks >>> Bye >>> >> plug a volume element before the audiosink. likewise you can use >> audiopanorama for balance. > Thanks for your suggestion, but it is possible create a mixer software > by playbin and Gstmixer interface? > bye > First replying to a digest is nice. Please consider changing the settings of your subscription or edit before replying. On the topic. The GstMixer exposes the mixer controls of the output if any. E.g jacksink don't have mixer controls. Using the volume element provides you with software controls. Maybe you can eplain what you actually want to do. Stefan ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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