root@dm814x-evm:~# GST_DEBUG="*v4l*:7" gst-launch v4l2src device=/dev/video0 ! video/x-raw-yuv,width=320,height=240,framerate=30/1,format=\(fourcc\)YUYV ! fakesink WARNING: erroneous pipeline: could not link v4l2src0 to fakesink0 root@dm814x-evm:~# GST_DEBUG="3" gst-launch v4l2src device=/dev/video0 ! video/x -raw-yuv,width=320,height=240,framerate=30/1,format=\(fourcc\)YUYV ! fakesink 0:00:00.000783600 1457 0x16050 INFO GST_INIT gst.c:605:init_pre: Initializing GStreamer Core Library version 0.10.32 0:00:00.001217550 1457 0x16050 INFO GST_INIT gst.c:606:init_pre: Using library installed in /usr/lib 0:00:00.001341700 1457 0x16050 INFO GST_INIT gst.c:616:init_pre: Linux dm814x-evm 2.6.37 #1 Wed Dec 26 18:11:35 IST 2012 armv7l 0:00:00.002124850 1457 0x16050 INFO GST_INIT gstquery.c:108:_gst_query_initialize: init queries 0:00:00.009233950 1457 0x16050 INFO GST_INIT gstmessage.c:73:_gst_message_initialize: init messages 0:00:00.011083000 1457 0x16050 INFO GST_PLUGIN_LOADING gstplugin.c:350:_gst_plugin_initialize: registering 0 static plugins 0:00:00.012232200 1457 0x16050 INFO GST_PLUGIN_LOADING gstplugin.c:255:gst_plugin_register_static: registered static plugin "staticelements" 0:00:00.012339100 1457 0x16050 INFO GST_PLUGIN_LOADING gstplugin.c:257:gst_plugin_register_static: added static plugin "staticelements", result: 1 0:00:00.014768750 1457 0x16050 INFO GST_REGISTRY gstregistry.c:1599:ensure_current_registry: reading registry cache: /home/root/.gstreamer-0.n 0:00:00.175003550 1457 0x16050 INFO GST_REGISTRY gstregistrybinary.c:614:gst_registry_binary_read_cache: loaded /home/root/.gstreamer-0.10/res 0:00:00.175580150 1457 0x16050 INFO GST_REGISTRY gstregistry.c:1469:scan_and_update_registry: Validating plugins from registry cache: /home/rn 0:00:00.205409600 1457 0x16050 INFO GST_REGISTRY gstregistry.c:1561:scan_and_update_registry: Registry cache has not changed 0:00:00.205536300 1457 0x16050 INFO GST_REGISTRY gstregistry.c:1628:ensure_current_registry: registry reading and updating done, result = 1 0:00:00.205610200 1457 0x16050 INFO GST_INIT gst.c:792:init_post: GLib runtime version: 2.24.1 0:00:00.205685950 1457 0x16050 INFO GST_INIT gst.c:794:init_post: GLib headers version: 2.24.1 0:00:00.205916600 1457 0x16050 INFO GST_PIPELINE gstparse.c:299:gst_parse_launch_full: parsing pipeline description 'v4l2src device=/dev/vide' 0:00:00.213005100 1457 0x16050 INFO GST_PLUGIN_LOADING gstplugin.c:859:gst_plugin_load_file: plugin "/usr/lib/gstreamer-0.10/libgstvideo4linux2.so"d 0:00:00.213152900 1457 0x16050 INFO GST_ELEMENT_FACTORY gstelementfactory.c:371:gst_element_factory_create: creating element "v4l2src" 0:00:00.218395700 1457 0x16050 INFO GST_ELEMENT_PADS gstelement.c:716:gst_element_add_pad: adding pad 'src' 0:00:00.223485050 1457 0x16050 INFO GST_PLUGIN_LOADING gstplugin.c:859:gst_plugin_load_file: plugin "/usr/lib/gstreamer-0.10/libgstcoreelements.so"d 0:00:00.223624100 1457 0x16050 INFO GST_ELEMENT_FACTORY gstelementfactory.c:371:gst_element_factory_create: creating element "fakesink" 0:00:00.224990000 1457 0x16050 INFO GST_ELEMENT_PADS gstelement.c:716:gst_element_add_pad: adding pad 'sink' 0:00:00.225408550 1457 0x16050 INFO GST_ELEMENT_FACTORY gstelementfactory.c:371:gst_element_factory_create: creating element "pipeline" 0:00:00.226098950 1457 0x16050 INFO GST_PIPELINE ./grammar.y:568:gst_parse_perform_link: linking v4l2src0:(any) to fakesink0:(any) (0/0) with" 0:00:00.226237850 1457 0x16050 INFO GST_ELEMENT_FACTORY gstelementfactory.c:371:gst_element_factory_create: creating element "capsfilter" 0:00:00.227053350 1457 0x16050 INFO GST_ELEMENT_PADS gstelement.c:716:gst_element_add_pad: adding pad 'sink' 0:00:00.227333100 1457 0x16050 INFO GST_ELEMENT_PADS gstelement.c:716:gst_element_add_pad: adding pad 'src' 0:00:00.227508450 1457 0x16050 INFO GST_STATES gstbin.c:1759:gst_bin_get_state_func: getting state 0:00:00.227692250 1457 0x16050 INFO GST_STATES gstelement.c:2341:gst_element_continue_state: completed state change to NULL 0:00:00.227900000 1457 0x16050 INFO GST_ELEMENT_PADS gstutils.c:1568:gst_element_link_pads_full: trying to link element v4l2src0:(any) to elementk 0:00:00.228002150 1457 0x16050 INFO GST_ELEMENT_PADS gstelement.c:963:gst_element_get_static_pad: found pad capsfilter0:sink 0:00:00.228096050 1457 0x16050 INFO GST_PADS gstutils.c:1468:prepare_link_maybe_ghosting: v4l2src0 and capsfilter0 in same bin, no need fs 0:00:00.228320850 1457 0x16050 INFO GST_PADS gstpad.c:1941:gst_pad_link_prepare: trying to link v4l2src0:src and capsfilter0:sink 0:00:00.565112650 1457 0x16050 INFO GST_PADS gstpad.c:2124:gst_pad_link_full: linked v4l2src0:src and capsfilter0:sink, successful 0:00:00.565382250 1457 0x16050 INFO GST_ELEMENT_PADS gstutils.c:1568:gst_element_link_pads_full: trying to link element capsfilter0:src to elemen) 0:00:00.565480700 1457 0x16050 INFO GST_ELEMENT_PADS gstelement.c:963:gst_element_get_static_pad: found pad capsfilter0:src 0:00:00.565579000 1457 0x16050 INFO GST_PADS gstutils.c:1028:gst_pad_check_link: trying to link capsfilter0:src and fakesink0:sink 0:00:00.573026300 1457 0x16050 INFO GST_ELEMENT_PADS gstutils.c:1203:gst_element_get_compatible_pad: Could not find a compatible pad tc 0:00:00.573137900 1457 0x16050 INFO default gstutils.c:1892:gst_element_link_pads_filtered: Could not link pads: capsfilter:src - fakesi) 0:00:00.573240550 1457 0x16050 INFO GST_STATES gstelement.c:2341:gst_element_continue_state: completed state change to NULL 0:00:00.573356900 1457 0x16050 INFO GST_ELEMENT_PADS gstpad.c:1713:gst_pad_unlink: unlinking v4l2src0:src(0x156000) and capsfilter0:sink(0x156190) 0:00:00.573515450 1457 0x16050 INFO GST_ELEMENT_PADS gstpad.c:1758:gst_pad_unlink: unlinked v4l2src0:src and capsfilter0:sink 0:00:00.573692900 1457 0x16050 INFO GST_PARENTAGE gstbin.c:1440:gst_bin_remove_func: removed child "capsfilter0" 0:00:00.573859550 1457 0x16050 INFO GST_REFCOUNTING gstelement.c:2955:gst_element_dispose: dispose 0:00:00.573949450 1457 0x16050 INFO GST_ELEMENT_PADS gstelement.c:835:gst_element_remove_pad: removing pad 'src' 0:00:00.574108050 1457 0x16050 INFO GST_ELEMENT_PADS gstelement.c:835:gst_element_remove_pad: removing pad 'sink' 0:00:00.574229900 1457 0x16050 INFO GST_REFCOUNTING gstelement.c:2979:gst_element_dispose: parent class dispose 0:00:00.574325950 1457 0x16050 INFO GST_REFCOUNTING gstelement.c:3010:gst_element_finalize: finalize 0:00:00.574415500 1457 0x16050 INFO GST_REFCOUNTING gstelement.c:3021:gst_element_finalize: finalize parent 0:00:00.574519850 1457 0x16050 ERROR GST_PIPELINE ./grammar.y:614:gst_parse_perform_link: could not link v4l2src0 to fakesink0 WARNING: erroneous pipeline: could not link v4l2src0 to fakesink0 root@dm814x-evm:~#