appsrc and appsink elements
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Hello, I would like to exchange buffers which are allocated and managed by an application of mine to and from a GStreamer pipeline. By reading the documentation it looks like the appsrc/appsink are the solution for me, but I am also reading here http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-data-spoof.html that "New API is being developed at the moment to make data insertion and extraction less painful for applications. It can be found as GstAppSrc and GstAppSink in the gst-plugins-bad module. At the time of writing (October 2007), this API is not quite stable and ready yet, even though it may work fine for your purposes." So, may I ask whether it is safe to use such elements or not ? Or are there alternative solutions ? Thanks, David S. ------------------------------------------------------------------------- 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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On Wed, 2008-07-30 at 12:03 +0200, David SIORPAES wrote:
> Hello, > > I would like to exchange buffers which are allocated and managed by an > application of mine to and from a GStreamer pipeline. > > By reading the documentation it looks like the appsrc/appsink are the > solution for me, but I am also reading here > http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-data-spoof.html > that > > "New API is being developed at the moment to make data insertion and > extraction less painful for applications. It can be found as GstAppSrc > and GstAppSink in the gst-plugins-bad module. At the time of writing > (October 2007), this API is not quite stable and ready yet, even though > it may work fine for your purposes." > > So, may I ask whether it is safe to use such elements or not ? Or are > there alternative solutions ? The versionsof appsink/appsrc in the latest release of gst-plugins-bad are full-featured and ready for consumption. See http://webcvs.freedesktop.org/gstreamer/gst-plugins-bad/examples/app/ for a whole bunch of examples of different use cases. Wim > > > Thanks, > > David S. > > > > > ------------------------------------------------------------------------- > 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 ------------------------------------------------------------------------- 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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Hello,
I have tried to use appsrc, but for some reason it doesn't seem to be recognized (I'm using gst-plugins-bad 0.10.8 on ubuntu 0.8.10) by gstreamer. For example, when I run the appsrc_ex example, I get an assertion error right after app->src = gst_element_factory_make("appsrc", NULL); so seems that app->src is null Also, gst-inspect doesn't find neither appsrc nor appsink. Thanks Andres Wim Taymans wrote: > On Wed, 2008-07-30 at 12:03 +0200, David SIORPAES wrote: > >> Hello, >> >> I would like to exchange buffers which are allocated and managed by an >> application of mine to and from a GStreamer pipeline. >> >> By reading the documentation it looks like the appsrc/appsink are the >> solution for me, but I am also reading here >> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-data-spoof.html >> that >> >> "New API is being developed at the moment to make data insertion and >> extraction less painful for applications. It can be found as GstAppSrc >> and GstAppSink in the gst-plugins-bad module. At the time of writing >> (October 2007), this API is not quite stable and ready yet, even though >> it may work fine for your purposes." >> >> So, may I ask whether it is safe to use such elements or not ? Or are >> there alternative solutions ? >> > > The versionsof appsink/appsrc in the latest release of gst-plugins-bad > are full-featured and ready for consumption. See > http://webcvs.freedesktop.org/gstreamer/gst-plugins-bad/examples/app/ > for a whole bunch of examples of different use cases. > > Wim > >> Thanks, >> >> David S. >> >> >> >> >> ------------------------------------------------------------------------- >> 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 >> > > > ------------------------------------------------------------------------- > 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 > > ------------------------------------------------------------------------------ SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: appsrc and appsink elements
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Hi Andres,
The appsrc and appsink are not part of the binary gstreamer-plugins-bad package on ubuntu 8.10 (reasoning is that they "still randomly change API and ABI" :-) But you can always build them from source: apt-get source gstreamer0.10-plugins-bad cd gst-plugins-bad0.10-0.10.5 (you might need to cange the version here) ./configure make After successful build, you can copy required shared libraries manually (if you just need appsrc/appsink) as follows: cp gst/app/.libs/libgstapp.so /usr/lib/gstreamer-0.10/ cp gst-libs/gst/app/.libs/libgstapp-0.10.so.0.0.0 /usr/local/lib You might need to create additional symbolic links in /usr/local/lib (both linking to libgstapp-0.10.so.0.0.0) : libgstapp-0.10.so.0 and libgstapp-0.10.so Now use gst-inspect to see if everything works fine... Jure Andres Colubri wrote: > Hello, > > I have tried to use appsrc, but for some reason it doesn't seem to be > recognized (I'm using gst-plugins-bad 0.10.8 on ubuntu 0.8.10) by > gstreamer. For example, when I run the appsrc_ex example, I get an > assertion error right after > app->src = gst_element_factory_make("appsrc", NULL); > so seems that app->src is null > > Also, gst-inspect doesn't find neither appsrc nor appsink. > > Thanks > Andres > > Wim Taymans wrote: > >> On Wed, 2008-07-30 at 12:03 +0200, David SIORPAES wrote: >> >> >>> Hello, >>> >>> I would like to exchange buffers which are allocated and managed by an >>> application of mine to and from a GStreamer pipeline. >>> >>> By reading the documentation it looks like the appsrc/appsink are the >>> solution for me, but I am also reading here >>> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-data-spoof.html >>> that >>> >>> "New API is being developed at the moment to make data insertion and >>> extraction less painful for applications. It can be found as GstAppSrc >>> and GstAppSink in the gst-plugins-bad module. At the time of writing >>> (October 2007), this API is not quite stable and ready yet, even though >>> it may work fine for your purposes." >>> >>> So, may I ask whether it is safe to use such elements or not ? Or are >>> there alternative solutions ? >>> >>> >> The versionsof appsink/appsrc in the latest release of gst-plugins-bad >> are full-featured and ready for consumption. See >> http://webcvs.freedesktop.org/gstreamer/gst-plugins-bad/examples/app/ >> for a whole bunch of examples of different use cases. >> >> Wim >> >> >>> Thanks, >>> >>> David S. >>> >>> >>> >>> >>> ------------------------------------------------------------------------- >>> 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 >>> >>> >> ------------------------------------------------------------------------- >> 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 >> >> >> > > > ------------------------------------------------------------------------------ > SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. > The future of the web can't happen without you. Join us at MIX09 to help > pave the way to the Next Web now. Learn more and register at > http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > ------------------------------------------------------------------------------ SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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Hey Jure, many thanks for the info.
I compiled libgstapp from source, and then copied libgstapp.so to /usr/lib/gstreamer-0.10. After creating the symbolic links libgstapp-0.10.so.0.0.0, libgstapp-0.10.so.0 and libgstapp-0.10.so, the appsrc and appsking plugins are found by gst-inspect, and also the examples work now. Jure Zitnik wrote: > Hi Andres, > The appsrc and appsink are not part of the binary gstreamer-plugins-bad > package on ubuntu 8.10 (reasoning is that they "still randomly change > API and ABI" :-) > But you can always build them from source: > apt-get source gstreamer0.10-plugins-bad > cd gst-plugins-bad0.10-0.10.5 (you might need to cange the version here) > ./configure > make > > After successful build, you can copy required shared libraries manually > (if you just need appsrc/appsink) as follows: > cp gst/app/.libs/libgstapp.so /usr/lib/gstreamer-0.10/ > cp gst-libs/gst/app/.libs/libgstapp-0.10.so.0.0.0 /usr/local/lib > You might need to create additional symbolic links in /usr/local/lib > (both linking to libgstapp-0.10.so.0.0.0) : libgstapp-0.10.so.0 and > libgstapp-0.10.so > > Now use gst-inspect to see if everything works fine... > > Jure > > Andres Colubri wrote: > >> Hello, >> >> I have tried to use appsrc, but for some reason it doesn't seem to be >> recognized (I'm using gst-plugins-bad 0.10.8 on ubuntu 0.8.10) by >> gstreamer. For example, when I run the appsrc_ex example, I get an >> assertion error right after >> app->src = gst_element_factory_make("appsrc", NULL); >> so seems that app->src is null >> >> Also, gst-inspect doesn't find neither appsrc nor appsink. >> >> Thanks >> Andres >> >> Wim Taymans wrote: >> >> >>> On Wed, 2008-07-30 at 12:03 +0200, David SIORPAES wrote: >>> >>> >>> >>>> Hello, >>>> >>>> I would like to exchange buffers which are allocated and managed by an >>>> application of mine to and from a GStreamer pipeline. >>>> >>>> By reading the documentation it looks like the appsrc/appsink are the >>>> solution for me, but I am also reading here >>>> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-data-spoof.html >>>> that >>>> >>>> "New API is being developed at the moment to make data insertion and >>>> extraction less painful for applications. It can be found as GstAppSrc >>>> and GstAppSink in the gst-plugins-bad module. At the time of writing >>>> (October 2007), this API is not quite stable and ready yet, even though >>>> it may work fine for your purposes." >>>> >>>> So, may I ask whether it is safe to use such elements or not ? Or are >>>> there alternative solutions ? >>>> >>>> >>>> >>> The versionsof appsink/appsrc in the latest release of gst-plugins-bad >>> are full-featured and ready for consumption. See >>> http://webcvs.freedesktop.org/gstreamer/gst-plugins-bad/examples/app/ >>> for a whole bunch of examples of different use cases. >>> >>> Wim >>> >>> >>> >>>> Thanks, >>>> >>>> David S. >>>> >>>> >>>> >>>> >>>> ------------------------------------------------------------------------- >>>> 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 >>>> >>>> >>>> >>> ------------------------------------------------------------------------- >>> 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 >>> >>> >>> >>> >> ------------------------------------------------------------------------------ >> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. >> The future of the web can't happen without you. Join us at MIX09 to help >> pave the way to the Next Web now. Learn more and register at >> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel >> >> > > > ------------------------------------------------------------------------------ > SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. > The future of the web can't happen without you. Join us at MIX09 to help > pave the way to the Next Web now. Learn more and register at > http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > > ------------------------------------------------------------------------------ SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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Actually, I misread your instructions, and I forgot to copy the libs
from gst-libs/gst/app/.libs to /usr/local/lib But instead to copy them to /usr/local/lib I put them in /usr/lib, since all the other base gstreamer libraries are there by default, and now appsrc and appsink seem to work fine. The only strange thing is that appsrc and appsink appear to be listed twice when running gst-inspect Andres Colubri wrote: > Hey Jure, many thanks for the info. > > I compiled libgstapp from source, and then copied libgstapp.so to > /usr/lib/gstreamer-0.10. After creating the symbolic links > libgstapp-0.10.so.0.0.0, libgstapp-0.10.so.0 and libgstapp-0.10.so, > the appsrc and appsking plugins are found by gst-inspect, and also the > examples work now. > > Jure Zitnik wrote: >> Hi Andres, >> The appsrc and appsink are not part of the binary >> gstreamer-plugins-bad package on ubuntu 8.10 (reasoning is that they >> "still randomly change API and ABI" :-) >> But you can always build them from source: >> apt-get source gstreamer0.10-plugins-bad >> cd gst-plugins-bad0.10-0.10.5 (you might need to cange the version here) >> ./configure >> make >> >> After successful build, you can copy required shared libraries >> manually (if you just need appsrc/appsink) as follows: >> cp gst/app/.libs/libgstapp.so /usr/lib/gstreamer-0.10/ >> cp gst-libs/gst/app/.libs/libgstapp-0.10.so.0.0.0 /usr/local/lib >> You might need to create additional symbolic links in /usr/local/lib >> (both linking to libgstapp-0.10.so.0.0.0) : libgstapp-0.10.so.0 and >> libgstapp-0.10.so >> >> Now use gst-inspect to see if everything works fine... >> >> Jure >> >> Andres Colubri wrote: >> >>> Hello, >>> >>> I have tried to use appsrc, but for some reason it doesn't seem to be >>> recognized (I'm using gst-plugins-bad 0.10.8 on ubuntu 0.8.10) by >>> gstreamer. For example, when I run the appsrc_ex example, I get an >>> assertion error right after >>> app->src = gst_element_factory_make("appsrc", NULL); >>> so seems that app->src is null >>> >>> Also, gst-inspect doesn't find neither appsrc nor appsink. >>> >>> Thanks >>> Andres >>> >>> Wim Taymans wrote: >>> >>>> On Wed, 2008-07-30 at 12:03 +0200, David SIORPAES wrote: >>>> >>>> >>>>> Hello, >>>>> >>>>> I would like to exchange buffers which are allocated and managed >>>>> by an >>>>> application of mine to and from a GStreamer pipeline. >>>>> >>>>> By reading the documentation it looks like the appsrc/appsink are the >>>>> solution for me, but I am also reading here >>>>> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-data-spoof.html >>>>> >>>>> that >>>>> >>>>> "New API is being developed at the moment to make data insertion and >>>>> extraction less painful for applications. It can be found as >>>>> GstAppSrc >>>>> and GstAppSink in the gst-plugins-bad module. At the time of writing >>>>> (October 2007), this API is not quite stable and ready yet, even >>>>> though >>>>> it may work fine for your purposes." >>>>> >>>>> So, may I ask whether it is safe to use such elements or not ? Or are >>>>> there alternative solutions ? >>>>> >>>>> >>>> The versionsof appsink/appsrc in the latest release of gst-plugins-bad >>>> are full-featured and ready for consumption. See >>>> http://webcvs.freedesktop.org/gstreamer/gst-plugins-bad/examples/app/ >>>> for a whole bunch of examples of different use cases. >>>> >>>> Wim >>>> >>>> >>>>> Thanks, >>>>> >>>>> David S. >>>>> >>>>> >>>>> >>>>> >>>>> ------------------------------------------------------------------------- >>>>> >>>>> 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 >>>>> >>>>> >>>> ------------------------------------------------------------------------- >>>> >>>> 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 >>>> >>>> >>>> >>> ------------------------------------------------------------------------------ >>> >>> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, >>> Nevada. >>> The future of the web can't happen without you. Join us at MIX09 to >>> help >>> pave the way to the Next Web now. Learn more and register at >>> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ >>> >>> _______________________________________________ >>> gstreamer-devel mailing list >>> [hidden email] >>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel >>> >> >> >> ------------------------------------------------------------------------------ >> >> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, >> Nevada. >> The future of the web can't happen without you. Join us at MIX09 to >> help >> pave the way to the Next Web now. Learn more and register at >> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ >> >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel >> >> > > ------------------------------------------------------------------------------ SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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In reply to this post by Jure Zitnik-2
Hi,
I've been struggling for a while with the appsrc element, and I wonder if anyone has any ideas about this. Basically, I'm trying to capture the contents of the screen into a video file. I'm not sure how to construct the pipeline to do it. I know that it has to start with an appsrc and end at a filesink, but I don't know how to initialize the appsrc (caps, max-bytes, etc) and what other intermediate elements are needed (encoders, demuxers). I looked at the examples that come with the source of appsrc, but these are for different scenarios (reading data from a file, streaming). Any help will be greatly appreciated. Thanks, Andres Jure Zitnik wrote: > Hi Andres, > The appsrc and appsink are not part of the binary gstreamer-plugins-bad > package on ubuntu 8.10 (reasoning is that they "still randomly change > API and ABI" :-) > But you can always build them from source: > apt-get source gstreamer0.10-plugins-bad > cd gst-plugins-bad0.10-0.10.5 (you might need to cange the version here) > ./configure > make > > After successful build, you can copy required shared libraries manually > (if you just need appsrc/appsink) as follows: > cp gst/app/.libs/libgstapp.so /usr/lib/gstreamer-0.10/ > cp gst-libs/gst/app/.libs/libgstapp-0.10.so.0.0.0 /usr/local/lib > You might need to create additional symbolic links in /usr/local/lib > (both linking to libgstapp-0.10.so.0.0.0) : libgstapp-0.10.so.0 and > libgstapp-0.10.so > > Now use gst-inspect to see if everything works fine... > > Jure > > Andres Colubri wrote: > >> Hello, >> >> I have tried to use appsrc, but for some reason it doesn't seem to be >> recognized (I'm using gst-plugins-bad 0.10.8 on ubuntu 0.8.10) by >> gstreamer. For example, when I run the appsrc_ex example, I get an >> assertion error right after >> app->src = gst_element_factory_make("appsrc", NULL); >> so seems that app->src is null >> >> Also, gst-inspect doesn't find neither appsrc nor appsink. >> >> Thanks >> Andres >> >> Wim Taymans wrote: >> >> >>> On Wed, 2008-07-30 at 12:03 +0200, David SIORPAES wrote: >>> >>> >>> >>>> Hello, >>>> >>>> I would like to exchange buffers which are allocated and managed by an >>>> application of mine to and from a GStreamer pipeline. >>>> >>>> By reading the documentation it looks like the appsrc/appsink are the >>>> solution for me, but I am also reading here >>>> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-data-spoof.html >>>> that >>>> >>>> "New API is being developed at the moment to make data insertion and >>>> extraction less painful for applications. It can be found as GstAppSrc >>>> and GstAppSink in the gst-plugins-bad module. At the time of writing >>>> (October 2007), this API is not quite stable and ready yet, even though >>>> it may work fine for your purposes." >>>> >>>> So, may I ask whether it is safe to use such elements or not ? Or are >>>> there alternative solutions ? >>>> >>>> >>>> >>> The versionsof appsink/appsrc in the latest release of gst-plugins-bad >>> are full-featured and ready for consumption. See >>> http://webcvs.freedesktop.org/gstreamer/gst-plugins-bad/examples/app/ >>> for a whole bunch of examples of different use cases. >>> >>> Wim >>> >>> >>> >>>> Thanks, >>>> >>>> David S. >>>> >>>> >>>> >>>> >>>> ------------------------------------------------------------------------- >>>> 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 >>>> >>>> >>>> >>> ------------------------------------------------------------------------- >>> 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 >>> >>> >>> >>> >> ------------------------------------------------------------------------------ >> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. >> The future of the web can't happen without you. Join us at MIX09 to help >> pave the way to the Next Web now. Learn more and register at >> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel >> >> > > > ------------------------------------------------------------------------------ > SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. > The future of the web can't happen without you. Join us at MIX09 to help > pave the way to the Next Web now. Learn more and register at > http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > > ------------------------------------------------------------------------------ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: appsrc and appsink elements
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que estas tratando de hacer?
2009/1/4 Andres Colubri <[hidden email]> Hi, ------------------------------------------------------------------------------ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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In reply to this post by acolubri
Andres Colubri schrieb:
> Hi, > > I've been struggling for a while with the appsrc element, and I wonder > if anyone has any ideas about this. Basically, I'm trying to capture the > contents of the screen into a video file. I'm not sure how to construct > the pipeline to do it. I know that it has to start with an appsrc and > end at a filesink, but I don't know how to initialize the appsrc (caps, > max-bytes, etc) and what other intermediate elements are needed > (encoders, demuxers). I looked at the examples that come with the source > of appsrc, but these are for different scenarios (reading data from a > file, streaming). Appsrc is for injecting data from applications. Appsrc & appsink allow to integrate gstreamer into a mulimedia application that uses a diffrent framework already. For screencapture you could use ximagesrc at the start of your pipeline. Stefan > > Any help will be greatly appreciated. > > Thanks, > Andres > > > Jure Zitnik wrote: >> Hi Andres, >> The appsrc and appsink are not part of the binary gstreamer-plugins-bad >> package on ubuntu 8.10 (reasoning is that they "still randomly change >> API and ABI" :-) >> But you can always build them from source: >> apt-get source gstreamer0.10-plugins-bad >> cd gst-plugins-bad0.10-0.10.5 (you might need to cange the version here) >> ./configure >> make >> >> After successful build, you can copy required shared libraries manually >> (if you just need appsrc/appsink) as follows: >> cp gst/app/.libs/libgstapp.so /usr/lib/gstreamer-0.10/ >> cp gst-libs/gst/app/.libs/libgstapp-0.10.so.0.0.0 /usr/local/lib >> You might need to create additional symbolic links in /usr/local/lib >> (both linking to libgstapp-0.10.so.0.0.0) : libgstapp-0.10.so.0 and >> libgstapp-0.10.so >> >> Now use gst-inspect to see if everything works fine... >> >> Jure >> >> Andres Colubri wrote: >> >>> Hello, >>> >>> I have tried to use appsrc, but for some reason it doesn't seem to be >>> recognized (I'm using gst-plugins-bad 0.10.8 on ubuntu 0.8.10) by >>> gstreamer. For example, when I run the appsrc_ex example, I get an >>> assertion error right after >>> app->src = gst_element_factory_make("appsrc", NULL); >>> so seems that app->src is null >>> >>> Also, gst-inspect doesn't find neither appsrc nor appsink. >>> >>> Thanks >>> Andres >>> >>> Wim Taymans wrote: >>> >>> >>>> On Wed, 2008-07-30 at 12:03 +0200, David SIORPAES wrote: >>>> >>>> >>>> >>>>> Hello, >>>>> >>>>> I would like to exchange buffers which are allocated and managed by an >>>>> application of mine to and from a GStreamer pipeline. >>>>> >>>>> By reading the documentation it looks like the appsrc/appsink are the >>>>> solution for me, but I am also reading here >>>>> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-data-spoof.html >>>>> that >>>>> >>>>> "New API is being developed at the moment to make data insertion and >>>>> extraction less painful for applications. It can be found as GstAppSrc >>>>> and GstAppSink in the gst-plugins-bad module. At the time of writing >>>>> (October 2007), this API is not quite stable and ready yet, even though >>>>> it may work fine for your purposes." >>>>> >>>>> So, may I ask whether it is safe to use such elements or not ? Or are >>>>> there alternative solutions ? >>>>> >>>>> >>>>> >>>> The versionsof appsink/appsrc in the latest release of gst-plugins-bad >>>> are full-featured and ready for consumption. See >>>> http://webcvs.freedesktop.org/gstreamer/gst-plugins-bad/examples/app/ >>>> for a whole bunch of examples of different use cases. >>>> >>>> Wim >>>> >>>> >>>> >>>>> Thanks, >>>>> >>>>> David S. >>>>> >>>>> >>>>> >>>>> >>>>> ------------------------------------------------------------------------- >>>>> 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 >>>>> >>>>> >>>>> >>>> ------------------------------------------------------------------------- >>>> 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 >>>> >>>> >>>> >>>> >>> ------------------------------------------------------------------------------ >>> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. >>> The future of the web can't happen without you. Join us at MIX09 to help >>> pave the way to the Next Web now. Learn more and register at >>> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ >>> _______________________________________________ >>> gstreamer-devel mailing list >>> [hidden email] >>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel >>> >>> >> >> ------------------------------------------------------------------------------ >> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. >> The future of the web can't happen without you. Join us at MIX09 to help >> pave the way to the Next Web now. Learn more and register at >> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel >> >> > > > ------------------------------------------------------------------------------ > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel ------------------------------------------------------------------------------ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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>> I've been struggling for a while with the appsrc element, and I wonder >> if anyone has any ideas about this. Basically, I'm trying to capture the >> contents of the screen into a video file. I'm not sure how to construct >> the pipeline to do it. I know that it has to start with an appsrc and >> end at a filesink, but I don't know how to initialize the appsrc (caps, >> max-bytes, etc) and what other intermediate elements are needed >> (encoders, demuxers). I looked at the examples that come with the source >> of appsrc, but these are for different scenarios (reading data from a >> file, streaming). >> > > Appsrc is for injecting data from applications. Appsrc & appsink allow to > integrate gstreamer into a mulimedia application that uses a diffrent framework > already. > For screencapture you could use ximagesrc at the start of your pipeline. > problem very clearly, because even though the end result of the pipeline consists in capturing the content of the application window (not the whole screen), I need a solution that is crossplatform. I did some tests already, and I can grab the contents of the window into memory buffers, so it seems to me that the best approach would be to push these buffers through an appsrc element. Regards, Andres ------------------------------------------------------------------------------ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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This post was updated on .
In reply to this post by Jure Zitnik-2
Hi all, I following the instruction above to add appsrc/appsink element into my gstreamer system. But still encounter some problem. Following are my steps: 1.download and build gst-plugins-base-0.10.24 2.cp /gst-plugins-base-0.10.24/gst/app/.libs/libgstapp.so /usr/lib/gstreamer-0.10/ 3.cp /gst-plugins-base-0.10.24/gst-libs/gst/app/.libs/libgstapp-0.10.so.0.17.0 /usr/local/lib 4.ln -s libgstapp-0.10.so.0.17.0 libgstapp-0.10.so.0 ln -s libgstapp-0.10.so.0.17.0 libgstapp-0.10.so 5.gst-inspect appsink then I got error messsage like "(gst-inspect-0.10:8454): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstapp.so': /gst-plugins-base-0.10.24/gst-libs/gst/app/.libs/libgstapp-0.10.so.0: undefined symbol: gst_buffer_list_get_type No such element or plugin 'appsink'" Did I still miss anything? Thank you for your help Shinstar |
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