<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt">Hello Martin, Thanks for your reply. I will try to install the appsrc library and see. I will now mix QtGstreamer libraries and gst libraries and see. As you mentioned, QtGstreamer is only a wrapper around the gstreamer library. As I had mentioned in my earlier mail QGst::Buffer::create() is creating and allocating but did not notice any g_free mentioned in that function. The appsrc library I was using was in Qt gstreamer utils. now I have to see how to get this gst/appsrc. I wish someone doing the QtGstreamer wrapper library responds to the question. Many thanks Trinadh. <div> </div><div> </div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> From: Angel Martin <amartin@vicomtech.org> To: trinadh Pala <me_wavelet@yahoo.co.uk>; Discussion of the development of and with GStreamer <gstreamer-devel@lists.freedesktop.org> Sent: Wednesday, 26 June 2013, 8:06 Subject: Re: how to release the GstBuffer memory </div> <div class="y_msg_container"> As far as i understood you can mix gstreamer baseline code with QT and use QT Objects as sinks but I've never used QT wrapper of gstreamer. The code that I posted fixes the memory leak for sure. 2013/6/25 trinadh Pala <<a ymailto="mailto:me_wavelet@yahoo.co.uk" href="mailto:me_wavelet@yahoo.co.uk">me_wavelet@yahoo.co.uk</a>>: > Hello Angel Martin & all, > > I have gone through the program that was in the link below. This program is > playing some 300 video frames and after that it stops. So if there is any > memory leak, it may not be able to indicate. So I am not sure whether this > program has been tested for memory leak. It is not clear to me how the > buffer release was implemented. If I call g_free(pointer). or > m_buffer->clear in my program after pushing the buffer to the pipeline, the > program exits. if I do not use g_free or m_buffer->clear then the program > continues to send the ts data to the down stream elemets and decoding > happens properly except for the problem of leaking memory. I am stuck with > the problem for a couple of day, the application is no use without fixing > this memory leak. Please help. > > Thanks and regards > Trinadh > > > ________________________________ > From: Angel Martin <<a ymailto="mailto:amartin@vicomtech.org" href="mailto:amartin@vicomtech.org">amartin@vicomtech.org</a>> > To: trinadh Pala <<a ymailto="mailto:me_wavelet@yahoo.co.uk" href="mailto:me_wavelet@yahoo.co.uk">me_wavelet@yahoo.co.uk</a>>; Discussion of the development of > and with GStreamer <<a ymailto="mailto:gstreamer-devel@lists.freedesktop.org" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a>> > Sent: Tuesday, 25 June 2013, 16:21 > Subject: Re: how to release the GstBuffer memory > > Hi, > > Here you will find the proper way: > > <a href="http://users.design.ucla.edu/~acolubri/test/gstreamer/appsrc_filesink.c" target="_blank">http://users.design.ucla.edu/~acolubri/test/gstreamer/appsrc_filesink.c</a> > /* used to inject a new buffer into the pipeline */ > static void > inject_new_buffer_into_pipeline (ProgramData * data) > { > guint size; > gpointer raw_buffer; > GstBuffer *app_buffer; > GstElement *source; > > size = 80 * 60 * 4; // 80x60 pixels, 32 bpp. > g_print ("Pushing a buffer of size %d\n", size); > > // Allocating the memory for the buffer. > raw_buffer = g_malloc0 (size); > > app_buffer = gst_app_buffer_new (raw_buffer, size, g_free, raw_buffer); > > /* newer basesrc will set caps for use automatically but it does not > really > * hurt to set it on the buffer again */ > gst_buffer_set_caps (app_buffer, gst_caps_from_string (video_caps)); > > /* get source an push new buffer */ > source = gst_bin_get_by_name (GST_BIN (data->sink), "testsource"); > gst_app_src_push_buffer (GST_APP_SRC (source), app_buffer); > } > > 2013/6/25 trinadh Pala <<a ymailto="mailto:me_wavelet@yahoo.co.uk" href="mailto:me_wavelet@yahoo.co.uk">me_wavelet@yahoo.co.uk</a>>: >> Hello, >> >> I am writing an application using QtGstreamer library. >> >> I am implemeting a media player application. i am using Appsource for >> linking the source. The data is available in a char *buffer. >> >> I created a buffer using QGst::Buffer::create(size). >> // pBuf has the Transport stream data char *pBuf >> // This piece of code is in a loop. >> >> QGst::BufferPtr m_buffer; >> m_buffer=QGst::Buffer::create(buf_size); >> >> quint8 *m_data_ptr=m_buffer->data(); >> >> memcpy(m_data_ptr,pBuf,buf_size); >> >> if(this->m_player->m_pipeline); >> >> ret = this->m_player->m_appsrc.pushBuffer(m_buffer); >> >> if (!m_buffer.isNull()) >> { >> if (ret != QGst::FlowOk) >> { >> /* some error, stop sending data */ >> qDebug("some error"); >> } >> else >> { >> qDebug("pushed a buffer successfully"); >> >> } >> } >> >> >> The method works, i am able to display the video. However, I did not know >> how to release the buffer created. so the application leaks memory. How to >> release the Buffer, after pushBuffer. Please help. >> >> Thanks and regards >> Trinadh >> >> _______________________________________________ >> gstreamer-devel mailing list >> <a ymailto="mailto:gstreamer-devel@lists.freedesktop.org" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> >> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> >> > _______________________________________________ > gstreamer-devel mailing list > <a ymailto="mailto:gstreamer-devel@lists.freedesktop.org" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> > <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> > > > > _______________________________________________ > gstreamer-devel mailing list > <a ymailto="mailto:gstreamer-devel@lists.freedesktop.org" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> > <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> > _______________________________________________ gstreamer-devel mailing list <a ymailto="mailto:gstreamer-devel@lists.freedesktop.org" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </div> </div> </div> </div></body></html>