create a video with tag on each jpeg

[Mailing List SVR]

Il giorno gio, 05/05/2011 alle 22.03 +0300, Stefan Kost ha scritto:
> Am 05.05.2011 20:14, schrieb 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?
> 
> Yes, as thiago said, add jpegparse in the playback pipleine. Otherwise you only
> get the tags from the avi-container and those that jpegdec finds.

Thanks but also using jpegparse the result is the same:

gst-launch -t filesrc location=test.avi ! avidemux ! jpegparse !
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".
formato contenitore: AVI
TAG TROVATO    : trovato dall'elemento "jpegparse0".
     codec video: Motion JPEG
formato contenitore: AVI
        commento: test image
La pipeline è in PREROLLED ...
Impostazione della pipeline a PLAYING ...
New clock: GstSystemClock

are you able to save jpeg frame and tag in a container? 

thanks
Nicola

> 
> Stefan
> 
> > 
> > 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
> >>
> >>>
> >>> _______________________________________________
> >>> gstreamer-devel mailing list
> >>> gstreamer-devel at lists.freedesktop.org
> >>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> >>
> >>
> >> _______________________________________________
> >> gstreamer-devel mailing list
> >> gstreamer-devel at lists.freedesktop.org
> >> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> > 
> > _______________________________________________
> > gstreamer-devel mailing list
> > gstreamer-devel at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>