<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="Generator" content="Microsoft Word 14 (filtered medium)"> <style></style> </head> <body lang="DE" link="blue" vlink="purple"> <div class="WordSection1"> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">I am not setting the size in my SampleCallback function but I am setting the size (and type of memory i.e.contiguous) where I provide the buffers to my grabber card.<o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> gstreamer-devel [mailto:gstreamer-devel-bounces@lists.freedesktop.org] <b>Im Auftrag von </b>Kiran Kumar<br> <b>Gesendet:</b> Mittwoch, 15. Juni 2016 07:49<br> <b>An:</b> Discussion of the development of and with GStreamer<br> <b>Betreff:</b> Re: Grabbing frames from GStreamer pipeline<o:p></o:p></span></p> <p class="MsoNormal"><o:p> </o:p></p> <div> <p class="MsoNormal">Hi,<o:p></o:p></p> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">Are you setting the size in your code?<o:p></o:p></p> </div> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> <div> <p class="MsoNormal">On Tue, Jun 14, 2016 at 10:46 PM, Thornton, Keith <<a href="mailto:keith.thornton@zeiss.com" target="_blank">keith.thornton@zeiss.com</a>> wrote:<o:p></o:p></p> <div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Hi, </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">I don’t know what you are doing but when I call gst_buffer_map for my Full HD frames, I get info.size=8294400 and one single block of memory which I can copy in a single operation.</span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> gstreamer-devel [mailto:<a href="mailto:gstreamer-devel-bounces@lists.freedesktop.org" target="_blank">gstreamer-devel-bounces@lists.freedesktop.org</a>] <b>Im Auftrag von </b>Kiran Kumar<br> <b>Gesendet:</b> Mittwoch, 15. Juni 2016 00:27<br> <b>An:</b> Discussion of the development of and with GStreamer<br> <b>Betreff:</b> Re: Grabbing frames from GStreamer pipeline</span><o:p></o:p></p> <div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I also used gst_base_sink_set_blocksize() to set the blocksize when the sink is in pull mode. Nothing changed.<o:p></o:p></p> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p> </div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thanks,<o:p></o:p></p> </div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Kiran<o:p></o:p></p> </div> </div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Mon, Jun 13, 2016 at 10:51 PM, Thornton, Keith <<a href="mailto:keith.thornton@zeiss.com" target="_blank">keith.thornton@zeiss.com</a>> wrote:<o:p></o:p></p> <div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Hi,</span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">I think you are mistaken when you say “</span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#666666">The gst_app_sink_pull_sample(), gst_sample_get_buffer() and gst_buffer_map() hands out only streams which are of size 4096 bytes each”. </span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666">I am using these APIs to pass full 1920 * 1080 frames. You should provide more details so that we can maybe see what is going wrong.</span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666"> </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> gstreamer-devel [mailto:<a href="mailto:gstreamer-devel-bounces@lists.freedesktop.org" target="_blank">gstreamer-devel-bounces@lists.freedesktop.org</a>] <b>Im Auftrag von </b>Kiran Kumar<br> <b>Gesendet:</b> Montag, 13. Juni 2016 21:20<br> <b>An:</b> <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank"> gstreamer-devel@lists.freedesktop.org</a><br> <b>Betreff:</b> Grabbing frames from GStreamer pipeline</span><o:p></o:p></p> <div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p> <div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#666666">Hi,</span><o:p></o:p></p> </div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p> </div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I am new to this forum. <span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#666666"><br> <br> I am trying to pull frames from gstreamer pipeline and feed it to user application. I am using appsink pad to pull out the frames while the pipeline is in the PLAYING state.<br> <br> Problem:<br> 1. The gst_app_sink_pull_sample(), gst_sample_get_buffer() and gst_buffer_map() hands out only streams which are of size 4096 bytes each. I tried changing the blocksize but, there is no effect.<br> <br> My goal:<br> To extract or pull a single frame into a single buffer and feed this buffer as input to my application which does some image processing (I am not using OpenCV).<br> <br> I want to pull every frame from the video-source, populate the buffer (each frame is associated with a particular buffer) and finally feed the buffer to my application. I don't want to dump this frame into a file in my filesystem.<br> <br> Questions:<br> 1. Are there any other ways in which I can achieve my goal without using appsink?<br> 2. If using appsink is the only way I can pull data from gstreamer, how can I achieve my goal using appsink?</span><o:p></o:p></p> </div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p> </div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I appreciate any guidance.<span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#666666"><br> <br> Thanks in advance.<br> Kiran</span><o:p></o:p></p> </div> </div> </div> </div> </div> </div> <p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><br> _______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a><br> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><o:p></o:p></p> </div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p> </div> </div> </div> </div> </div> <p class="MsoNormal" style="margin-bottom:12.0pt"><br> _______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a><br> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><o:p></o:p></p> </div> <p class="MsoNormal"><o:p> </o:p></p> </div> </div> </body> </html>