[root@armadillo840-0 (ttySC2) /home/ftp/pub]# cat Armadiilo_jpeg.sh 
#!/bin/bash
gst-launch-1.0 -e v4l2src device=/dev/video0 num-buffers=10 \
! video/x-raw,format=NV12,width=640,height=480,framerate=30/1 \
! acmjpegenc ! multifilesink location=/sd/mnt/output%d.jpeg

[root@armadillo840-0 (ttySC2) /home/ftp/pub]# sh -x ./Armadiilo_jpeg.sh 
+ gst-launch-1.0 -e v4l2src device=/dev/video0 num-buffers=10 ! video/x-raw,format=NV12,width=640,height=480,framerate=30/1 !
 acmjpegenc ! multifilesink location=/sd/mnt/output%d.jpeg
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data flow error.
Additional debug info:
gstbasesrc.c(2812): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
streaming task paused, reason not-negotiated (-4)
EOS on shutdown enabled -- waiting for EOS after Error
Waiting for EOS...
.Caught interrupt -- handling interrupt.
Interrupt: Stopping pipeline ...
Interrupt while waiting for EOS - stopping pipeline...
Execution ended after 12768461747 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...

[root@armadillo840-0 (ttySC2) /home/ftp/pub]# ls /sd/mnt
[root@armadillo840-0 (ttySC2) /home/ftp/pub]#