Hi! Tim, Thanks for your reply. I would misunderstand the meaning of "pull-mode sink". You mean, pull-mode and buffer allocated by sink are two different things, right? In the fact, my sink is for a HW device, so I want the source to use the HW buffer (allocated in sink) for data flow, not to allocate by source itself. I wish to use udpsrc for the pipeline, and found it is based on GstPushSrc. (Therefore, I thought I should implement a pull-based sink, and find a pull-based source) $ gst-launch udpsrc udp://IP:PORT ! mysink However, my buffer_alloc function is not called. France Hsu <div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi, > I'm a newbie for gstreamer and working on a sink that I wish it would > provide buffer for source. I think it would be a pull-based sink. > (...) > I implemented this sink based on base-sink, and added the virtual > function: buffer_alloc() (gst_my_sink_buffer_alloc) and render() > (gst_my_sink_render). What kind of sink is this? There's no need for the sink to operate in pull mode to be able to provide buffers to upstream. It should be sufficient to implement a buffer alloc function. Take for example: $ GST_DEBUG=*src:5,*sink:5 videotestsrc num-buffers=2 ! ximagesink This will operate in push mode, but videotestsrc will call gst_pad_alloc_buffer() to get a buffer from ximagesink and then fill that with data and push it back to ximagesink. Pull mode for sinks is something that's not really used much in practice and is rarely useful. Maybe you could provide some more details of what you're trying to do? Cheers -Tim ------------------------------ Message: 3 Date: Thu, 4 Feb 2010 08:51:07 -0800 (PST) From: na <<a href="mailto:nahmed31@hotmail.com">nahmed31@hotmail.com</a>> Subject: [gst-devel] h264 playback, qtdemux issue To: <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> Message-ID: <<a href="mailto:1265302267125-1469069.post@n4.nabble.com">1265302267125-1469069.post@n4.nabble.com</a>> Content-Type: text/plain; charset=us-ascii Hello, I am new to gstreamer and I wanted to setup a pipeline that can playback an h.264 video that is encapsulated within an MP4 container. I am using the following command: gst-launch -v --gst-debug-level=2 filesrc location=hdv_0015_480p_384kbps_20fps.mp4 ! qtdemux ! ffdec_h264 ! ximagesink I have attached the console output below. Any help is greatly appreciated. Thanks. Best regards, Nadeem ---------------------- gst-launch -v --gst-debug-level=2 filesrc location=hdv_0015_480p_384kbps_20fps.mp4 ! qtdemux ! ffdec_h264 ! ximagesink Setting pipeline to PAUSED ... 0:00:00.128491689 2421 0x91fcb78 WARN qtdemux qtdemux_types.c:154:qtdemux_type_get: unknown QuickTime node type avc1 0:00:00.128991982 2421 0x91fcb78 WARN qtdemux qtdemux_types.c:154:qtdemux_type_get: unknown QuickTime node type avcC 0:00:00.129232998 2421 0x91fcb78 WARN qtdemux qtdemux.c:3186:qtdemux_parse_container:<qtdemux0> length too long (1572864 > 28) 0:00:00.129468726 2421 0x91fcb78 WARN qtdemux qtdemux.c:3186:qtdemux_parse_container:<qtdemux0> length too long (1507328 > 27) 0:00:00.130451079 2421 0x91fcb78 WARN qtdemux qtdemux.c:4907:qtdemux_parse_trak:<qtdemux0> unknown version 00000000 /GstPipeline:pipeline0/ffdec_h264:ffdec_h2640.GstPad:sink: caps = video/x-h264, codec_data=(buffer)01404033ffe1001d674d40339a7406c1ef3fffdd0fdd9a880000030008000003014478c19501000468ee3c80, width=(int)852, height=(int)480, framerate=(fraction)143/7, pixel-aspect-ratio=(fraction)847/852 Pipeline is PREROLLING ... /GstPipeline:pipeline0/ffdec_h264:ffdec_h2640.GstPad:src: caps = video/x-raw-yuv, width=(int)852, height=(int)480, framerate=(fraction)143/7, format=(fourcc)I420, interlaced=(boolean)false, pixel-aspect-ratio=(fraction)847/852 0:00:00.229889863 2421 0x91fcb78 WARN qtdemux qtdemux.c:2645:gst_qtdemux_loop:<qtdemux0> error: streaming stopped, reason not-negotiated ERROR: from element /GstPipeline:pipeline0/GstQTDemux:qtdemux0: GStreamer encountered a general stream error. Additional debug info: qtdemux.c(2645): gst_qtdemux_loop (): /GstPipeline:pipeline0/GstQTDemux:qtdemux0: streaming stopped, reason not-negotiated ERROR: pipeline doesn't want to preroll. Setting pipeline to NULL ... /GstPipeline:pipeline0/ffdec_h264:ffdec_h2640.GstPad:src: caps = NULL /GstPipeline:pipeline0/ffdec_h264:ffdec_h2640.GstPad:sink: caps = NULL /GstPipeline:pipeline0/GstQTDemux:qtdemux0.GstPad:audio_00: caps = NULL /GstPipeline:pipeline0/GstQTDemux:qtdemux0.GstPad:video_00: caps = NULL Freeing pipeline ... -- View this message in context: <a href="http://n4.nabble.com/h264-playback-qtdemux-issue-tp1469069p1469069.html" target="_blank">http://n4.nabble.com/h264-playback-qtdemux-issue-tp1469069p1469069.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. ------------------------------ Message: 4 Date: Thu, 4 Feb 2010 09:13:05 -0800 From: Michael Smith <<a href="mailto:msmith@xiph.org">msmith@xiph.org</a>> Subject: Re: [gst-devel] h264 playback, qtdemux issue To: Discussion of the development of GStreamer <<a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a>> Message-ID: <<a href="mailto:3c1737211002040913m11f1f78cxda4f349b660f1c89@mail.gmail.com">3c1737211002040913m11f1f78cxda4f349b660f1c89@mail.gmail.com</a>> Content-Type: text/plain; charset=ISO-8859-1 On Thu, Feb 4, 2010 at 8:51 AM, na <<a href="mailto:nahmed31@hotmail.com">nahmed31@hotmail.com</a>> wrote: > > Hello, > > I am new to gstreamer and I wanted to setup a pipeline that can playback an > h.264 video that is encapsulated within an MP4 container. > > I am using the following command: > > gst-launch -v --gst-debug-level=2 filesrc > location=hdv_0015_480p_384kbps_20fps.mp4 ! qtdemux ! ffdec_h264 ! ximagesink Use xvimagesink. In general it's also a good idea to have ffmpegcolorspace in between the decoder and the video sink in case the decoder is outputting a format that the sink can't accept. Mike ------------------------------ Message: 5 Date: Thu, 04 Feb 2010 18:14:44 +0100 From: Wim Taymans <<a href="mailto:wim.taymans@gmail.com">wim.taymans@gmail.com</a>> Subject: Re: [gst-devel] h264 playback, qtdemux issue To: Discussion of the development of GStreamer <<a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a>> Message-ID: <1265303684.3283.100.camel@metal> Content-Type: text/plain; charset="UTF-8" On Thu, 2010-02-04 at 08:51 -0800, na wrote: > Hello, > > I am new to gstreamer and I wanted to setup a pipeline that can playback an > h.264 video that is encapsulated within an MP4 container. > > I am using the following command: > > gst-launch -v --gst-debug-level=2 filesrc > location=hdv_0015_480p_384kbps_20fps.mp4 ! qtdemux ! ffdec_h264 ! ximagesink > Add ffmpegcolorspace before ximagesink or use: gst-launch playbin2 uri=file:///path/to/file.mp4 Wim > I have attached the console output below. Any help is greatly appreciated. > Thanks. > > Best regards, > > Nadeem > > ---------------------- > > gst-launch -v --gst-debug-level=2 filesrc > location=hdv_0015_480p_384kbps_20fps.mp4 ! qtdemux ! ffdec_h264 ! ximagesink > Setting pipeline to PAUSED ... > 0:00:00.128491689 2421 0x91fcb78 WARN qtdemux > qtdemux_types.c:154:qtdemux_type_get: unknown QuickTime node type avc1 > 0:00:00.128991982 2421 0x91fcb78 WARN qtdemux > qtdemux_types.c:154:qtdemux_type_get: unknown QuickTime node type avcC > 0:00:00.129232998 2421 0x91fcb78 WARN qtdemux > qtdemux.c:3186:qtdemux_parse_container:<qtdemux0> length too long (1572864 > > 28) > 0:00:00.129468726 2421 0x91fcb78 WARN qtdemux > qtdemux.c:3186:qtdemux_parse_container:<qtdemux0> length too long (1507328 > > 27) > 0:00:00.130451079 2421 0x91fcb78 WARN qtdemux > qtdemux.c:4907:qtdemux_parse_trak:<qtdemux0> unknown version 00000000 > /GstPipeline:pipeline0/ffdec_h264:ffdec_h2640.GstPad:sink: caps = > video/x-h264, > codec_data=(buffer)01404033ffe1001d674d40339a7406c1ef3fffdd0fdd9a880000030008000003014478c19501000468ee3c80, > width=(int)852, height=(int)480, framerate=(fraction)143/7, > pixel-aspect-ratio=(fraction)847/852 > Pipeline is PREROLLING ... > /GstPipeline:pipeline0/ffdec_h264:ffdec_h2640.GstPad:src: caps = > video/x-raw-yuv, width=(int)852, height=(int)480, framerate=(fraction)143/7, > format=(fourcc)I420, interlaced=(boolean)false, > pixel-aspect-ratio=(fraction)847/852 > 0:00:00.229889863 2421 0x91fcb78 WARN qtdemux > qtdemux.c:2645:gst_qtdemux_loop:<qtdemux0> error: streaming stopped, reason > not-negotiated > ERROR: from element /GstPipeline:pipeline0/GstQTDemux:qtdemux0: GStreamer > encountered a general stream error. > Additional debug info: > qtdemux.c(2645): gst_qtdemux_loop (): > /GstPipeline:pipeline0/GstQTDemux:qtdemux0: > streaming stopped, reason not-negotiated > ERROR: pipeline doesn't want to preroll. > Setting pipeline to NULL ... > /GstPipeline:pipeline0/ffdec_h264:ffdec_h2640.GstPad:src: caps = NULL > /GstPipeline:pipeline0/ffdec_h264:ffdec_h2640.GstPad:sink: caps = NULL > /GstPipeline:pipeline0/GstQTDemux:qtdemux0.GstPad:audio_00: caps = NULL > /GstPipeline:pipeline0/GstQTDemux:qtdemux0.GstPad:video_00: caps = NULL > Freeing pipeline ... > ------------------------------ Message: 6 Date: Thu, 04 Feb 2010 17:27:36 +0000 From: Tim-Philipp M?ller <<a href="mailto:t.i.m@zen.co.uk">t.i.m@zen.co.uk</a>> Subject: Re: [gst-devel] h264 playback, qtdemux issue To: <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> Message-ID: <1265304456.3607.32.camel@zingle> Content-Type: text/plain; charset="UTF-8" On Thu, 2010-02-04 at 18:14 +0100, Wim Taymans wrote: > Add ffmpegcolorspace before ximagesink or use: If you use ximagesink (and not e.g. xvimagesink), a videoscale may also be needed, in case the image needs to be scaled to accommodate the aspect ratio. Cheers -Tim ------------------------------ ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. <a href="http://p.sf.net/sfu/theplanet-com" target="_blank">http://p.sf.net/sfu/theplanet-com</a> ------------------------------ _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> End of gstreamer-devel Digest, Vol 45, Issue 8 ********************************************** </blockquote></div>