<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;background-color:#FFFFFF;font-family:Calibri,Arial,Helvetica,sans-serif;"> <p>Hello, Tim</p> <p><br> </p> <p>I have a question about memory management.</p> <p><br> </p> <p>Almost all functions returning pointer: for example <span>gst_element_factory_make();</span></p> <p><span><br> </span></p> <p><span>Do i need to "delete" it after i don`t need it?</span></p> <p><span>Will you also have time to explain why?</span></p> <p><span><br> </span></p> <p><span>My question in c++ code:</span></p> <p><span><br> </span></p> <p><span>v1:</span></p> <p><span>class Recorder</span></p> <p><span>{</span></p> <p><span><span><span class="Apple-tab-span" style="white-space:pre"></span>GstElement* _pipeline = <span>nullptr</span>;</span><br> </span></p> <p><span style="font-size: 12pt;"><br> </span></p> <p><span style="font-size: 12pt;"> </span><span class="Apple-tab-span" style="font-size: 12pt; white-space: pre;"> </span><span style="font-size: 12pt;">void Start()</span><br> </p> <p><span><span class="Apple-tab-span" style="white-space:pre"></span>{</span></p> <p><span><span class="Apple-tab-span" style="white-space:pre"></span><span class="Apple-tab-span" style="white-space:pre"></span>if(<span style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">_pipeline !=nullptr</span>) delete <span style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">_pipeline ;</span><br> </span></p> <p><span><span style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"><br> </span></span></p> <p><span><span style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"><span class="Apple-tab-span" style="white-space:pre"></span><span class="Apple-tab-span" style="white-space:pre"></span> _pipeline = <span>gst_pipeline_new("VideoRecorder");</span></span><br> </span></p> <p><span><span style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"><span><br> </span></span></span></p> <p><span><span style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"><span><span class="Apple-tab-span" style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; white-space: pre;"></span><span class="Apple-tab-span" style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; white-space: pre;"></span>//some code<br> </span></span></span></p> <p><span><span class="Apple-tab-span" style="white-space:pre"></span>}</span></p> <p><span style="font-size: 12pt;">}</span><br> </p> <p><span style="font-size: 12pt;"><br> </span></p> <p><span style="font-size: 12pt;"></span></p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> v2:</p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> class Recorder</p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> {</p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span class="Apple-tab-span" style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; white-space: pre;"></span><span style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">GstElement* _pipeline</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">;</span><br> </p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"><br> </span></p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span class="Apple-tab-span" style="white-space: pre;"> </span>void Start()<br> </p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span class="Apple-tab-span" style="white-space: pre;"></span>{</p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span class="Apple-tab-span" style="white-space: pre;"></span><span class="Apple-tab-span" style="white-space: pre;"></span>_pipeline = gst_pipeline_new("VideoRecorder");<br> </p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <br> </p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span class="Apple-tab-span" style="white-space: pre;"></span><span class="Apple-tab-span" style="white-space: pre;"></span>//some code<br> </p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span class="Apple-tab-span" style="white-space: pre;"></span>}</p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span style="font-size: 12pt;">}</span></p> <div><span style="font-size: 12pt;"><br> </span></div> <br> <p></p> <p><span style="font-size: 12pt;"></span></p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> v3:</p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> class Recorder</p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> {</p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span class="Apple-tab-span" style="white-space: pre;"> </span>void Start()<br> </p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span class="Apple-tab-span" style="white-space: pre;"></span>{</p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <br> </p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span class="Apple-tab-span" style="white-space: pre;"></span><span class="Apple-tab-span" style="white-space: pre;"></span> <span style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">GstElement* </span>_pipeline = gst_pipeline_new("VideoRecorder");<br> </p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <br> </p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span class="Apple-tab-span" style="white-space: pre;"></span><span class="Apple-tab-span" style="white-space: pre;"></span>//some code<br> </p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span class="Apple-tab-span" style="white-space: pre;"></span>}</p> <p style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> <span style="font-size: 12pt;">}</span></p> <br> <p></p> <div>Best regards, Michael.</div> </div> <hr style="display:inline-block;width:98%" tabindex="-1"> <div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Tim Müller [via GStreamer-devel] <ml-node+<a href="/user/SendEmail.jtp?type=node&node=4679650&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>><br> <b>Sent:</b> Friday, September 16, 2016 6:19:47 PM<br> <b>To:</b> Michael Yarochkin<br> <b>Subject:</b> Re: Video processing(record\play) real time from camera with metadata</font> <div> </div> </div> <div>On Fri, 2016-09-16 at 06:49 -0700, Mikl wrote: <br> <br> Hi, <br> <div class="shrinkable-quote"><br> > For the moment i am doing only video and from test source. <br> > Here is my pipeline <br> > videotestsrc ! video/x- <br> > raw,format=RGB,width=800,height=400,framerate=24/1 ! matroskamux <br> > ! filesink location=c:\gstreamer\test.mkv <br> > I have file. It have size (big one). I can see structure <br> > using MKVToolNix. <br> > videotestsrc will be replaced by appsrc. And i will not <br> > need capsfilter anymore. <br> > <br> > But: <br> > -i can not play it <br> > -see no information </div> <br> Yes, it will be very big, because you are storing raw (unencoded) video <br> frames in the file. If you want to encode them, add a x264enc (for <br> example) before matroskamux. <br> <br> <br> > Even when i did simple pipeline <br> > videotestsrc ! avimux ! filesink location=c:\gstreamer\test.avi <br> > i was not able to see information about video, navigate in video. <br> > And it was opened not in all players. <br> <br> I suspect not all players will be able to handle raw video in AVI. <br> Also, if you use gst-launch-1.0 (or your own app) you will need to make <br> sure that you shut down the pipeline 'cleanly', so that the muxer has <br> an opportunity to finalise the file properly (write indices, fix up the <br> header, etc.). In gst-launch-1.0 you do that by passing the -e command <br> line option, or using videotestsrc num-buffers=100 or such. In your <br> application you would have to send an EOS event on the pipeline with <br> gst_element_send_event(pipeline, gst_event_new_eos()) and then wait for <br> an EOS message on the bus before shutting down the pipeline with <br> gst_element_set_state(). <br> <br> Cheers <br> -Tim <br> <br> -- <br> Tim Müller, Centricular Ltd - <a href="http://www.centricular.com" target="_top" rel="nofollow" link="external"> http://www.centricular.com</a><br> <br> Join us at the GStreamer Conference! <br> 10-11 October 2016 in Berlin, <br> Germany <br> <a href="http://gstreamer.freedesktop.org/conference/" target="_top" rel="nofollow" link="external">http://gstreamer.freedesktop.org/conference/</a><br> <br> <br> _______________________________________________ <br> gstreamer-devel mailing list <br> <a href="/user/SendEmail.jtp?type=node&node=4679636&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a> <br> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_top" rel="nofollow" link="external">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br> <br> <br> <hr noshade="noshade" size="1" color="#cccccc"> <div style="color:#444; font: 12px tahoma,geneva,helvetica,arial,sans-serif;"> <div style="font-weight:bold">If you reply to this email, your message will be added to the discussion below:</div> <a href="http://gstreamer-devel.966125.n4.nabble.com/Video-processing-record-play-real-time-from-camera-with-metadata-tp4679305p4679636.html" target="_top" rel="nofollow" link="external">http://gstreamer-devel.966125.n4.nabble.com/Video-processing-record-play-real-time-from-camera-with-metadata-tp4679305p4679636.html</a> </div> <div style="color:#666; font: 11px tahoma,geneva,helvetica,arial,sans-serif;margin-top:.4em;line-height:1.5em"> To unsubscribe from Video processing(record\play) real time from camera with metadata, <a href="" target="_top" rel="nofollow" link="external"> click here</a>.<br> <a href="http://gstreamer-devel.966125.n4.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml" rel="nofollow" style="font:9px serif" target="_top" link="external">NAML</a> </div> </div> <br/><hr align="left" width="300" /> View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Video-processing-record-play-real-time-from-camera-with-metadata-tp4679305p4679650.html">Re: Video processing(record\play) real time from camera with metadata</a><br/> Sent from the <a href="http://gstreamer-devel.966125.n4.nabble.com/">GStreamer-devel mailing list archive</a> at Nabble.com.<br/>