GSREAMER-OMX multivideos

[Gofrane]

thank you
I modified it to this 

gst-launch-1.0 -e  \
videomixer name=mix  sink_0::xpos=0   sink_0::ypos=0  sink_0::alpha=0  
sink_1::xpos=0   sink_1::ypos=0  sink_2::xpos=200 sink_2::ypos=0 
sink_3::xpos=0   sink_3::ypos=100   sink_4::xpos=200 sink_4::ypos=100 \
    !  glimagesink   \
*videotestsrc pattern="black"  ! video/x-raw,width=400,height=200  !
mix.sink_0  \
filesrc location=big_buck_bunny_480p_h264.mov  \
! qtdemux ! queue max-size-bytes=10000000 ! h264parse ! omxh264dec   ! queue
max-size-buffers=4 ! video/x-raw,width=200,height=100  ! mix.sink_1 \
filesrc location=big_buck_bunny_480p_h264.mov  \
! qtdemux !  queue max-size-bytes=10000000 ! h264parse ! omxh264dec  ! queue
max-size-buffers=4 ! video/x-raw,width=200,height=100  ! mix.sink_2 \
filesrc location=big_buck_bunny_480p_h264.mov  \
! qtdemux ! queue max-size-bytes=10000000 ! h264parse ! omxh264dec  ! queue
max-size-buffers=4 ! video/x-raw,width=200,height=100  ! mix.sink_3  \
filesrc location=big_buck_bunny_720p_h264.mov   \
 ! qtdemux ! queue max-size-bytes=10000000 ! h264parse ! omxh264dec  ! queue
max-size-buffers=4 ! video/x-raw,width=200,height=100   ! mix.sink_4 \
*

but T got this error

*Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Got context from element 'glimagesink0': gst.gl.GLDisplay=context,
gst.gl.GLDisplay=(GstGLDisplay)"\(GstGLDisplayEGL\)\ gldisplayegl0";
ERROR: from element
/GstPipeline:pipeline0/GstOMXH264Dec-omxh264dec:omxh264dec-omxh264dec3:
Internal data stream error.
Additional debug info:
gstomxvideodec.c(2886): gst_omx_video_dec_loop ():
/GstPipeline:pipeline0/GstOMXH264Dec-omxh264dec:omxh264dec-omxh264dec3:
stream stopped, reason not-negotiated
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ..*



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