Hi, In this case omx_h264dec gives output in format of video/x-raw-yuv-strided (NV12), and ffmpegcolorspace and videomixer are not able to accept this format as an input. So I have modified this pipeline yesterday as below. sudo GST_DEBUG=2 gst-launch-0.10 rtspsrc location=rtsp://<a href="http://root:nlss123@192.168.1.24:554/axis-media/media.amp">root:nlss123@192.168.1.24:554/axis-media/media.amp</a> ! rtph264depay ! h264parse access-unit=true output-format=1 ! omx_h264dec ! "video/x-raw-yuv-strided,format=(fourcc)NV12, width=600, height=400, framerate=(fraction)30/1, rowstride=700" ! stridetransform ! "video/x-raw-yuv, format=(fourcc)NV12, width=600, height=400, framerate=(fraction)30/1" ! ffmpegcolorspace ! videomixer ! ffmpegcolorspace ! "video/x-raw-yuv,format=(fourcc)NV12, width=600, height=400, framerate=(fraction)30/1" ! stridetransform ! "video/x-raw-yuv-strided, format=(fourcc)NV12, width=600, height=400, framerate=(fraction)30/1, rowstride=700" ! v4l2sink sync=false Still I am not able to get proper output. While running the pipeline I am getting below logs in that. Can you please help me out for the same? Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock: GstSystemClock 0:00:02.082519531 1650 0x11ddc78 WARN omx gstomx_base_filter.c:742:buffer_alloc:<omxh264dec0> faking settings changed notification 0:00:02.083129883 1650 0x11ddc78 ERROR GST_CAPS gstpad.c:2203:gst_pad_get_caps_unlocked:<omxh264dec0:src> pad returned caps video/x-raw-yuv, width=(int)800, height=(int)600, format=(fourcc)NV12; video/x-raw-yuv-strided, width=(int)800, height=(int)600, format=(fourcc)NV12, rowstride=(int)[ 1, 2147483647 ] which are not a real subset of its template caps video/x-raw-yuv, format=(fourcc){ NV12 }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]; video/x-raw-yuv-strided, format=(fourcc){ NV12 }, rowstride=(int)[ 0, 2147483647 ], width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ] (gst-launch-0.10:1650): GStreamer-WARNING **: pad omxh264dec0:src returned caps which are not a real subset of its template caps (gst-launch-0.10:1650): GStreamer-CRITICAL **: gst_pad_fixate_caps: assertion `!gst_caps_is_empty (caps)' failed (gst-launch-0.10:1650): GStreamer-CRITICAL **: gst_pad_set_caps: assertion `caps == NULL || gst_caps_is_fixed (caps)' failed in tiler_assisted_phase1_D2CReMap(phase1_d2c_remap.c:233) Translated Address = 0x7ff89000 <=v2s==*[p=(nil)(0x0),l=0x0,s=0,fmt=0x0] =(qb)=>*[p=(nil)(0x7ff89000),l=0x0,s=0,fmt=0x0] <=(qb)= [p=(nil)(0x7ff89000),l=0x77000,s=0] ==(RBUF)=>buf={n=1,id=0x0, [p=(nil)(0x7ff89000),l=0x77000,s=0]} <=(RBUF)==buf={n=1,id=0xda7a000, [p=(nil)(0x7ff89000),l=0x77000,s=0]} ptr=0x2b64b000 at tiler_assisted_phase1_D2CReMap(phase1_d2c_remap.c:357) out(0x2b64b000) at tiler_assisted_phase1_D2CReMap(phase1_d2c_remap.c:381) in tiler_assisted_phase1_D2CReMap(phase1_d2c_remap.c:233) Translated Address = 0x7ff12000 <=v2s==*[p=(nil)(0x0),l=0x0,s=0,fmt=0x0] =(qb)=>*[p=(nil)(0x7ff12000),l=0x0,s=0,fmt=0x0] <=(qb)= [p=(nil)(0x7ff12000),l=0x77000,s=0] ==(RBUF)=>buf={n=1,id=0x0, [p=(nil)(0x7ff12000),l=0x77000,s=0]} <=(RBUF)==buf={n=1,id=0xda7b000, [p=(nil)(0x7ff12000),l=0x77000,s=0]} ptr=0x2b792000 at tiler_assisted_phase1_D2CReMap(phase1_d2c_remap.c:357) out(0x2b792000) at tiler_assisted_phase1_D2CReMap(phase1_d2c_remap.c:381) 0:00:02.138183594 1650 0x11ddc78 WARN omx gstomx_base_filter.c:742:buffer_alloc:<omxh264dec0> faking settings changed notification (gst-launch-0.10:1650): GStreamer-CRITICAL **: pad omxh264dec0:src returned NULL caps from getcaps function 0:00:02.146026611 1650 0x11cd510 WARN basesrc gstbasesrc.c:2550:gst_base_src_loop:<udpsrc4> error: Internal data flow error. 0:00:02.146179199 1650 0x11cd510 WARN basesrc gstbasesrc.c:2550:gst_base_src_loop:<udpsrc4> error: streaming task paused, reason not-linked (-1) =(tm)=> [p=0x32e35000(0x0),l=0x415000,s=0] =(tm)=> [p=0x33807000(0x0),l=0x415000,s=0] =(tm)=> [p=0x3412b000(0x0),l=0x415000,s=0] =(tm)=> [p=0x34a1c000(0x0),l=0x415000,s=0] =(tm)=> [p=0x35345000(0x0),l=0x415000,s=0] =(tm)=> [p=0x35d56000(0x0),l=0x415000,s=0] =(tm)=> [p=0x365b2000(0x0),l=0x415000,s=0] =(tm)=> [p=0x36ed4000(0x0),l=0x415000,s=0] =(tm)=> [p=0x37852000(0x0),l=0x415000,s=0] =(tm)=> [p=0x381fd000(0x0),l=0x415000,s=0] =(tm)=> [p=0x38aa1000(0x0),l=0x415000,s=0] =(tm)=> [p=0x39323000(0x0),l=0x415000,s=0] =(tm)=> [p=0x39c02000(0x0),l=0x415000,s=0] =(tm)=> [p=0x3a4e1000(0x0),l=0x415000,s=0] =(tm)=> [p=0x3ade0000(0x0),l=0x415000,s=0] =(tm)=> [p=0x3b77a000(0x0),l=0x415000,s=0] =(tm)=> [p=0x3bfe4000(0x0),l=0x415000,s=0] =(tm)=> [p=0x3c901000(0x0),l=0x415000,s=0] =(tm)=> [p=0x3d2db000(0x0),l=0x415000,s=0] =(tm)=> [p=0x3dc16000(0x0),l=0x415000,s=0] =(tm)=> [p=0x3e517000(0x0),l=0x415000,s=0] =(tm)=> [p=0x3ee52000(0x0),l=0x415000,s=0] Thanks, Deep Shah <div class="gmail_extra"> <div class="gmail_quote">On Mon, Apr 23, 2012 at 7:08 PM, Felipe Contreras <<a href="mailto:felipe.contreras@gmail.com" target="_blank">felipe.contreras@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5">On Thu, Apr 19, 2012 at 2:48 PM, Deep Shah <<a href="mailto:deep.shah@sibridgetech.com">deep.shah@sibridgetech.com</a>> wrote: > Hi Team, > > I am trying to connect omx_h264dec ( H264 hardware accelerator decoder for > panda board ) to videomixer plugin. I need to connect four RTSP streams to > videomixer through hardware accelerator plugin of decoder. > > I am trying to play below pipeline > > rtspsrc location=rtsp://<a href="http://id:passwd@192.168.255.1:8554/uri" target="_blank">id:passwd@192.168.255.1:8554/uri</a> ! rtph264depay ! > h264parse access-unit=true ! omx_h264dec ! ffmpegcolorspace ! videomixer ! > v4l2sink > > But I am not able to run this pipeline. Can anyone please help me out for > the same? </div></div>Maybe it's related to the caps negotiation; there's bytstream and avc formats. These are sort of new (at least with regards to gst-openmax), so AFAIK they have not been implemented there. You might want to force the caps, or hack the code to specify one or the other; your hardware might work only with bytestream for example. Also, it's usually useful to split the pipeline; say, receive the data from the payloader and save it to a file, and then try different pipelines to decode it. Cheers. -- Felipe Contreras _______________________________________________ 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>