create a video with tag on each jpeg

[Mailing List SVR]

Il giorno gio, 05/05/2011 alle 13.34 -0300, Thiago Sousa Santos ha
scritto:
> On Thu, 2011-05-05 at 18:13 +0200, Mailing List SVR wrote:
> > Hi,
> > 
> > I would like to record a live video (mjpeg) and add a tag on each jpeg
> > image, I'm trying a pipeline like this:
> > 
> > gst-launch-0.10 -e -t http://192.168.2.17/moxa-cgi/mjpeg.cgi !
> > jpegparse ! taginject tags="comment=\"test image\"" ! jifmux ! avimux !
> > filesink location=/tmp/test.avi
> > 
> > this give the following output:
> > 
> > mpostazione della pipeline a PAUSED ...
> > La pipeline è in PREROLLING ...
> > TAG TROVATO    : trovato dall'elemento "taginject0".
> >         commento: test image
> > La pipeline è in PREROLLED ...
> > Impostazione della pipeline a PLAYING ...
> > New clock: GstSystemClock
> > 
> > 
> > and when I play the generated file only a tag is generated and it is on
> > avidemux and not on the jpeg images:
> > 
> > gst-launch-0.10 -t filesrc location=/tmp/test.avi ! avidemux ! jpegdec !
> > xvimagesink
> > Impostazione della pipeline a PAUSED ...
> > La pipeline è in PREROLLING ...
> > TAG TROVATO    : trovato dall'elemento "avidemux0".
> >      codec video: Motion JPEG
> > TAG TROVATO    : trovato dall'elemento "avidemux0".
> >         commento: test image
> > formato contenitore: AVI
> > La pipeline è in PREROLLED ...
> > Impostazione della pipeline a PLAYING ...
> > 
> > any hints?
> 
> Here's some tips on debugging it:
> 
> Drop avimux from the recording pipeline and use multifilesink to save
> each image to a different file, then check if the individual jpegs have
> the tag.

with this pipeline:

gst-launch-0.10 -e -t http://... ! jpegparse ! taginject tags="comment=
\"test image\"" ! jifmux ! multifilesink location=%02d.jpg

each image has the tag, do you know a way to mux the image with the tag?

I tryed:

gst-launch multifilesrc location=%02d.jpg
caps="image/jpeg,framerate=5/1,width=352,height=288,pixel-aspect-ratio=1/1" ! videorate ! image/jpeg,framerate=5/1 ! avimux ! filesink location=test.avi

but after the muxing the tag is in the avi container and not in the
jpegs? Am I missing something?

Reading the docs:

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-tags-write.html

"A nice extra feature in GStreamer tag support is that tags are
preserved in pipelines"

this doesn't seems true with the posted pipelines,

thanks
Nicola


> 
> Also, try adding jpegparse on the playback pipeline and check if it
> finds those tags, not sure of the tag reading capabilities of jpegdec.
> 
> Good luck :)
> 
> > 
> > thanks
> > Nicola
> 
> --
> Thiago
> 
> > 
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> > gstreamer-devel at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> 
> 
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