<div dir="ltr"><div>What OS? What version of GStreamer? </div>Enable logging (export GST_DEBUG=*:3 or something) and do some digging. Something must be failing. </div><div class="gmail_extra"> <div class="gmail_quote"> On Thu, Mar 6, 2014 at 6:07 AM, kj192 <<a href="mailto:elte.kissjanos@gmail.com" target="_blank">elte.kissjanos@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi Everyone, I would like to have help from You. I (try to) use gstreamer to play video in SDL 2. Here is the code of my function where I want to update SDL_Texture: static GstFlowReturn on_buffer (GstAppSink * sink, gpointer user_data) { GstBuffer* sample = gst_app_sink_pull_buffer(sink); GstCaps* caps = gst_buffer_get_caps (sample); if (!caps) g_print ("could not get snapshot format\n"); GstStructure* s = gst_caps_get_structure (caps, 0); gint width, height; int res = gst_structure_get_int (s, "width", &width) | gst_structure_get_int (s, "height", &height); if (!res) g_print ("could not get snapshot dimension\n"); //printf("caps struct=%s\n", gst_caps_to_string(caps)); SDL_Rect r{0, 0, width, height}; SDL_Texture *tex = SDL_CreateTexture(RENDER, SDL_PIXELFORMAT_IYUV, SDL_TEXTUREACCESS_STREAMING, width, height); if (SDL_UpdateTexture(tex, &r,GST_BUFFER_DATA(sample),(width*4)) == 0) { printf("ok texture update\n"); } else { printf("SDL_textureupdate failed: %s\n", SDL_GetError()); } if ( SDL_RenderCopyEx(RENDER, tex, NULL, &r,ROTATION,NULL,SDL_FLIP_NONE) == 0) { printf("ok rendercopy \n"); } else { printf("SDL_ rendercopy failed: %s\n", SDL_GetError()); } SDL_RenderPresent(RENDER); gst_buffer_unref(sample); SDL_DestroyTexture(tex); sleep(0.5); return GST_FLOW_OK; } I don't have any error, but there is nothing in my screen. The Gstreamer Appsink seems to be working, because the video what I play is 2 seconds 30FPS and the on_buffer callback is being called 60 times. complete code <<a href="http://pastebin.com/8SXhZZw2" target="_blank">http://pastebin.com/8SXhZZw2</a>> Looking forward to your answers kj192 -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Read-frame-from-Gstreamer-buffer-to-SDL-Texture-tp4665787.html" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/Read-frame-from-Gstreamer-buffer-to-SDL-Texture-tp4665787.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. _______________________________________________ gstreamer-devel mailing list <a 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> </blockquote></div> </div>