[gst-devel] gst buffer to image

[Mailing List SVR]

In data domenica 6 dicembre 2009 13:47:20, Gabriel Duarte ha scritto:
: > How!

Basically you have to use a pipeline like this

gst.parse_launch('fakesrc name=src ! queue name=queue ! ffmpegcolorspace ! 
video/x-raw-rgb,width=320,height=240 ! pngenc ! fakesink name=sink signal-
handoffs=true')

and then push the frame with something like:

queue.get_pad('src').push(frame)

this way you'll get a png image,

Nicola

> 
> On Sun, Dec 6, 2009 at 6:02 AM, Mailing List SVR 
<lists at svrinformatica.it>wrote:
> > I solved myself pushing the frame to a second pipeline,
> >
> > thanks
> > Nicola
> >
> > In data sabato 5 dicembre 2009 23:27:59, Mailing List SVR ha scritto:
> > : > In data sabato 5 dicembre 2009 19:39:31, Mailing List SVR ha scritto:
> > > : > Hi all,
> > > >
> > > > I'm using a simple playbin pipeline, I can get the last frame with
> > > >  something like this:
> > > >
> > > > In [124]: frame=player.get_property("frame")
> > > >
> > > > In [125]: frame
> > > > Out[125]: <gst.Buffer 0x1fed6f0 of size 115200 and data 0x49484445>
> > >
> > > additionally:
> > >
> > > In [34]: frame.get_caps().to_string()
> > > Out[34]: 'video/x-raw-yuv, width=(int)320, height=(int)240,
> > > framerate=(fraction)10/1, format=(fourcc)I420,
> > > interlaced=(boolean)false, pixel-aspect-ratio=(fraction)1/1'
> > >
> > > I tried this pipeline:
> > >
> > > gst-launch-0.10 -v filesrc location=/tmp/frame  ! "video/x-raw-yuv,
> > > width=(int)320, height=(int)240, framerate=(fraction)10/1,
> > > format=(fourcc)I420, interlaced=(boolean)false, pixel-aspect-
> > > ratio=(fraction)1/1"  ! jpegenc ! filesink location=test.jpg
> > >
> > > but the jpg generated is bad (attacched). I attacch also the saved
> > >  frame.data
> > >
> > > > now I can access frame.data that would be the raw frame data, but how
> >
> > to
> >
> > > > convert this frame to a jpg or png image? I tried to save the frame
> > > > to
> >
> > a
> >
> > > >  file and to convert with jpegenc and pngenc with no success, any
> > > >  suggestions?
> > > >
> > > > thanks
> > > > Nicola
> >
> > -------------------------------------------------------------------------
> >
> > > >-- --- Join us December 9, 2009 for the Red Hat Virtual Experience, a
> >
> > free
> >
> > > > event focused on virtualization and cloud computing.
> > > > Attend in-depth sessions from your desk. Your couch. Anywhere.
> > > > http://p.sf.net/sfu/redhat-sfdev2dev
> > > > _______________________________________________
> > > > gstreamer-devel mailing list
> > > > gstreamer-devel at lists.sourceforge.net
> > > > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
> >
> > -------------------------------------------------------------------------
> >----- Join us December 9, 2009 for the Red Hat Virtual Experience,
> > a free event focused on virtualization and cloud computing.
> > Attend in-depth sessions from your desk. Your couch. Anywhere.
> > http://p.sf.net/sfu/redhat-sfdev2dev
> > _______________________________________________
> > gstreamer-devel mailing list
> > gstreamer-devel at lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>