<div dir="ltr">2008/10/12 Štěpán <<a href="mailto:stepan1117@atlas.cz">stepan1117@atlas.cz</a>> <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 am really new to gstreamer and I am trying to play an .avi file (for a start). I am able to play the file with gst-launch  filesrc  location=something.avi  !  avidemux name=demuxer   demuxer.  !  queue ! ffdec_mpeg4 ! ffmpegcolorspace ! sdlvideosink   demuxer. ! queue ! mad ! audioconvert ! audioresample ! osssink But I need to do that in a program, so I tried to rewrite it to the code. Here is what I have now (argv[1] is the name of input .avi): ----------- code begins ------------ GMainLoop *loop;    GstElement *pipeline, *source, *demuxer, *decoder, *conv,*mpeg_decoder,*mpeg_space, *video_sink,*audio_decoder,*audio_convert,*audio_resample,*audio_sink,*video_bin, *audio_bin,        *video_queue,*audio_queue;    GstBus *bus;    /* Initialisation */    gst_init(&argc, &argv);    loop = g_main_loop_new(NULL, FALSE);    /* Create gstreamer elements */    pipeline = gst_pipeline_new ("video-player");    source = gst_element_factory_make ("filesrc", "file-source"); // source    demuxer = gst_element_factory_make ("avidemux", "avi-demuxer"); // demuxer    video_queue = gst_element_factory_make("queue","video_queue"); // video fronta    mpeg_decoder = gst_element_factory_make ("ffdec_mpeg4", "mpeg-decoder"); // mpeg decoder    mpeg_space = gst_element_factory_make ("ffmpegcolorspace", "color-space"); // color space    video_sink = gst_element_factory_make("sdlvideosink", "video_sink"); // vykreslovac    audio_queue = gst_element_factory_make("queue","audio_queue");    audio_decoder = gst_element_factory_make ("mad", "audio-decoder");    audio_convert = gst_element_factory_make ("audioconvert", "audio-convert");    audio_resample = gst_element_factory_make("audioresample", "audio_resample");    audio_sink = gst_element_factory_make ("autoaudiosink", "audio-sink");    if (!pipeline || !source || !mpeg_decoder || !mpeg_space || !video_sink || !audio_decoder            || !audio_convert || !audio_resample || !audio_sink || !video_queue || !audio_queue){        g_printerr ("One element could not be created. Exiting.\n");        return -1;    }    /* we set the input filename to the source element */    g_object_set (G_OBJECT (source), "location", argv[1], NULL);    video_bin = gst_pipeline_new ("video_bin");    gst_bin_add_many (GST_BIN (video_bin),video_queue, mpeg_decoder, mpeg_space, video_sink, NULL);    gst_element_link_many (mpeg_decoder, video_queue,mpeg_space,video_sink, NULL);    audio_bin = gst_pipeline_new ("audio_bin");    gst_bin_add_many (GST_BIN (audio_bin), audio_queue,audio_decoder, audio_convert,audio_resample,audio_sink, NULL);    gst_element_link_many ( audio_decoder, audio_queue,audio_convert,audio_resample,audio_sink, NULL);    /* we add a message handler */    bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));    gst_bus_add_watch (bus, bus_call, loop);    gst_object_unref (bus);    gst_bin_add_many (GST_BIN (pipeline), source,demuxer,NULL);    gst_element_link(source,demuxer);    gst_bin_add (GST_BIN (pipeline), video_bin);    gst_bin_add (GST_BIN (pipeline), audio_bin);    gst_element_link(demuxer,video_bin);    gst_element_link(demuxer,audio_bin);    /* Set the pipeline to "playing" state*/    g_print ("Now playing: %s\n", argv[1]);    gst_element_set_state (pipeline, GST_STATE_PLAYING);    /* Iterate */    g_print ("Running...\n");    g_main_loop_run (loop);    /* Out of the main loop, clean up nicely */    g_print ("Returned, stopping playback\n");    gst_element_set_state (pipeline, GST_STATE_NULL);    g_print ("Deleting pipeline\n");    gst_object_unref (GST_OBJECT (pipeline)); ----------- code ends -------------- But this does not work, I always end with this error: gstavidemux.c(3779): gst_avi_demux_loop (): /GstPipeline:video-player/GstAviDemux:avi-demuxer:\nstreaming stopped, reason not-linked" Or, more precisely from the stderr: ---- log begins ----- 0:00:16.645434576  [336m10637 [00m 0x7fa59c000b50  [37mLOG   [00m  [00;01;35m      GST_SCHEDULING gstpad.c:4069:gst_pad_push:<avi-demuxer:video_00> [00m pushing, but it was not linked 0:00:16.645442485  [336m10637 [00m 0x7fa59c000b50  [37mLOG   [00m  [00m            avidemux gstavidemux.c:3363:gst_avi_demux_combine_flows:<avi-demuxer> [00m cobined return not-linked 0:00:16.645450229  [336m10637 [00m 0x7fa59c000b50  [36mDEBUG [00m  [00m            avidemux gstavidemux.c:3466:gst_avi_demux_process_next_entry:<avi-demuxer> [00m Processed buffer 3: not-linked 0:00:16.645458033  [336m10637 [00m 0x7fa59c000b50  [36mDEBUG [00m  [00m            avidemux gstavidemux.c:3474:gst_avi_demux_process_next_entry:<avi-demuxer> [00m returning not-linked 0:00:16.645464954  [336m10637 [00m 0x7fa59c000b50  [32;01mINFO  [00m  [00m            avidemux gstavidemux.c:3736:gst_avi_demux_loop: [00m stream_movi flow: not-linked 0:00:16.645472746  [336m10637 [00m 0x7fa59c000b50  [37mLOG   [00m  [00m            avidemux gstavidemux.c:3752:gst_avi_demux_loop:<avi-demuxer> [00m pausing task, reason not-linked 0:00:16.645481639  [336m10637 [00m 0x7fa59c000b50  [36mDEBUG [00m  [00;01;37;41m            GST_PADS gstpad.c:4768:gst_pad_pause_task:<avi-demuxer:sink> [00m pause task 0:00:16.645491405  [336m10637 [00m 0x7fa59c000b50  [36mDEBUG [00m  [00m                task gsttask.c:476:gst_task_pause:<task2> [00m Pausing task 0x9c7940 0:00:16.645609511  [336m10637 [00m 0x7fa59c000b50  [33;01mWARN  [00m  [00m            avidemux gstavidemux.c:3779:gst_avi_demux_loop:<avi-demuxer> [00m error: Vnitřní chyba datového proudu. 0:00:16.645619223  [336m10637 [00m 0x7fa59c000b50  [33;01mWARN  [00m  [00m            avidemux gstavidemux.c:3779:gst_avi_demux_loop:<avi-demuxer> [00m error: streaming stopped, reason not-linked 0:00:16.645631090  [336m10637 [00m 0x7fa59c000b50  [36mDEBUG [00m  [00;04m             default gstelement.c:1644:gst_element_message_full:<avi-demuxer> [00m start->1 0:00:16.645691274  [336m10637 [00m 0x7fa59c000b50  [32;01mINFO  [00m  [00;01;31;47m    GST_ERROR_SYSTEM gstelement.c:1675:gst_element_message_full:<avi-demuxer> [00m posting message: Vnitřní chyba datového proudu. 0:00:16.645704961  [336m10637 [00m 0x7fa59c000b50  [37mLOG   [00m  [00;01;37;41m         GST_MESSAGE gstmessage.c:204:gst_message_init: [00m new message 0x92f6c0 0:00:16.645713569  [336m10637 [00m 0x7fa59c000b50  [37mLOG   [00m  [00;01;37;41m         GST_MESSAGE gstmessage.c:289:gst_message_new_custom: [00m source avi-demuxer: creating new message 0x92f6c0 error 0:00:16.645740710  [336m10637 [00m 0x7fa59c000b50  [36mDEBUG [00m  [00;43m             GST_BUS gstbus.c:337:gst_bus_post:<bus0> [00m [msg 0x92f6c0] posting on bus, type error, GstMessageError, gerror=(GstGError)(NULL), debug=(string)"gstavidemux.c\(3779\):\ gst_avi_demux_loop\ \(\):\ /GstPipeline:video-player/GstAviDemux:avi-demuxer:\012streaming\ stopped\,\ reason\ not-linked"; from source <avi-demuxer> 0:00:16.645759690  [336m10637 [00m 0x7fa59c000b50  [36mDEBUG [00m  [00;01m                 bin gstbin.c:2729:gst_bin_handle_message_func:<video-player> [00m [msg 0x92f6c0] handling child avi-demuxer message of type error ---- log ends ------ Linked against gstreamer v. 0.10.21-42.pm.2, gstreamer-plugins-good v. 0.10.7-38.1 on Opensuse 11 x86-64, 2.6.25.16-0.1-default There is definitely something, what I am doing wrong, but I am unable to find it... </blockquote><div> You can't link the demuxer to your output bins like that. The demuxer uses 'sometimes' pads. Reading this you certainly help you:  <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-pads.html">http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-pads.html</a>  </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Thanks in advance ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world <a href="http://moblin-contest.org/redirect.php?banner_id=100&url=/" target="_blank">http://moblin-contest.org/redirect.php?banner_id=100&url=/</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> </blockquote></div> -- Thiago Sousa Santos Embedded Systems and Pervasive Computing Lab (Embedded) Center of Electrical Engineering and Informatics (CEEI) Federal University of Campina Grande (UFCG) </div>