[gst-devel] MPEG4 Compliant Simple Profile

Mailing List SVR lists at svrinformatica.it
Tue Nov 10 08:51:39 CET 2009 

Anyone? So there isn't a way to reverse engineering an mpeg4 compliant simple 
profile stream?

In data lunedì 9 novembre 2009 17:39:56, Mailing List SVR ha scritto:
: > In data lunedì 9 novembre 2009 17:27:58, Edward Hervey ha scritto:
> : > On Mon, 2009-11-09 at 15:45 +0100, Mailing List SVR wrote:
> : >
> > > In data lunedì 9 novembre 2009 14:21:38, Kapil Agrawal ha scritto:
> > > : > if the data is send as rtp, then you have to use  proper rtp
> > > : > depayloader
> > > >
> > > > after udpsrc and then store the file.
> > >
> > > this is the point: the stream seems not rtp payloded or at least
> > > gstreamer doesn't recognize it as rtp
> > >
> > > gstbasertpdepayload.c(360): gst_base_rtp_depayload_chain ():
> > > /GstPipeline:pipeline0/GstRtpMP4VDepay:rtpmp4vdepay0:
> > > Not RTP format was negotiated
> > >
> > > but the stream would be rtp according to verint,
> >
> >   You can't use rtp without the specification of the streams. Those
> > specifications normally come in a sdp file.
> 
> Yes I know, I asked to the manufacter (verint) for the sdp but their answer
> was that the sdp was not available and I have to use their sdk (windows
>  dll) to integrate the stream, but I'm on linux.
> However I think the stream is in a standard format, my reseller was able to
> see the video over rtp with a decoder of a different manufacter (not
>  verint). So I need a way to reverse enginering the sdp/ get gstreamer caps
> 
> >   If your device supports it, just use rtsp (which provides those stream
> > description).
> 
> No :-(, no rtsp only mpeg4 simpe profile over udp/rtp
> 
> > > thanks
> > > Nicola
> > >
> > > > On Mon, Nov 9, 2009 at 6:39 PM, Mailing List SVR
> > >
> > > <lists at svrinformatica.it>wrote:
> > > > > In data lunedì 9 novembre 2009 13:51:20, Kapil Agrawal ha scritto:
> > > > > : > Maybe you can just record the encoded stream and then play it
> > > > > : > using
> > > > >
> > > > > other
> > > > >
> > > > > > players like vlc,
> > > > >
> > > > > I tryed:
> > > > >
> > > > > gst-launch-0.10 -e -v udpsrc port=2544 ! filesink location=test.mp4
> > > > >
> > > > > but the resulting test.mp4 file is not playable with vlc or mplayer
> > > > >
> > > > > > since ffdec_mpeg4 isnt a very recommended decoder.
> > > > >
> > > > > what other choices are available to decode mpeg4 with gstreamer?
> > > > >
> > > > > > Or
> > > > > >  even better is file a bug attaching a small video clip.
> > > > > >
> > > > > > regards
> > > > > > kapil
> > > > > >
> > > > > > On Mon, Nov 9, 2009 at 3:15 PM, Mailing List SVR
> > > > >
> > > > > <lists at svrinformatica.it>wrote:
> > > > > > > Hi all,
> > > > > > >
> > > > > > > I'm trying to see the video from a verint nextiva s1970e
> > > > > > > encoder, according to
> > > > > > > the manufacter they send an "mpeg4 compliant simple profile
> > > > > > > stream over rtp/udp",
> > > > > > >
> > > > > > > I tryed the following pipeline
> > > > > > >
> > > > > > > gst-launch-0.10 -v udpsrc port=2544 ! decodebin ! autovideosink
> > > > > > >
> > > > > > > here is the output:
> > > > > > >
> > > > > > > Setting pipeline to PAUSED ...
> > > > > > > Pipeline is live and does not need PREROLL ...
> > > > > > > Setting pipeline to PLAYING ...
> > > > > > > New clock: GstSystemClock
> > > > >
> > > > > /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:t
> > > > >yp efin
> > > > >
> > > > > > >d.GstPad:src: caps = video/mpeg, systemstream=(boolean)false,
> > > > > > > mpegversion=(int)4
> > > > >
> > > > > /GstPipeline:pipeline0/GstDecodeBin:decodebin0/ffdec_mpeg4:ffdec_mp
> > > > >eg 40.G
> > > > >
> > > > > > >stPad:sink: caps = video/mpeg, systemstream=(boolean)false,
> > > > > > > mpegversion=(int)4
> > > > > > > /GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstGhostPad:src0
> > > > > > >: caps = video/x-raw-yuv, width=(int)0, height=(int)0,
> > > > > > > framerate=(fraction)25/1, format=(fourcc)I420,
> > > > > > > interlaced=(boolean)false
> > > > >
> > > > > /GstPipeline:pipeline0/GstDecodeBin:decodebin0/ffdec_mpeg4:ffdec_mp
> > > > >eg 40.G
> > > > >
> > > > > > >stPad:src: caps = video/x-raw-yuv, width=(int)0, height=(int)0,
> > > > > > > framerate=(fraction)25/1,
> > > > > > > format=(fourcc)I420, interlaced=(boolean)false
> > > > > > > /GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstGhostPad:src0
> > > > > > >: caps = video/x-raw-yuv, width=(int)704, height=(int)576,
> > > > > > > framerate=(fraction)30000/1,
> > > > > > > format=(fourcc)I420, interlaced=(boolean)false, pixel-aspect-
> > > > > > > ratio=(fraction)12/11
> > > > >
> > > > > /GstPipeline:pipeline0/GstDecodeBin:decodebin0/ffdec_mpeg4:ffdec_mp
> > > > >eg 40.G
> > > > >
> > > > > > >stPad:src: caps = video/x-raw-yuv, width=(int)704,
> > > > > > > height=(int)576, framerate=(fraction)30000/1,
> > > > > > > format=(fourcc)I420,
> > > > > > > interlaced=(boolean)false,
> > > > > > > pixel-aspect-ratio=(fraction)12/11
> > > > >
> > > > > /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstXvImageSi
> > > > >nk
> > > > >
> > > > >:aut
> > > > >:
> > > > > > >ovideosink0- actual-sink-xvimage.GstPad:sink: caps =
> > > > > > > video/x-raw-yuv, width=(int)704, height=(int)576,
> > > > > > > framerate=(fraction)30000/1, format=(fourcc)I420,
> > > > > > > interlaced=(boolean)false,
> > > > > > > pixel-aspect-ratio=(fraction)12/11
> 
> /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0.GstGhostPad:sink:
> > > > > > > caps
> > > > > > > = video/x-raw-yuv, width=(int)704, height=(int)576,
> > > > > > > framerate=(fraction)30000/1, format=(fourcc)I420,
> > > > > > > interlaced=(boolean)false,
> > > > > > > pixel-aspect-ratio=(fraction)12/11
> > > > >
> > > > > /GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstGhostPad:src0.Gst
> > > > >Pr oxyP
> > > > >
> > > > > > >ad:proxypad2: caps = video/x-raw-yuv, width=(int)704,
> > > > > > > height=(int)576, framerate=(fraction)30000/1,
> > > > > > > format=(fourcc)I420,
> > > > > > > interlaced=(boolean)false,
> > > > > > > pixel-aspect-ratio=(fraction)12/11
> > > > >
> > > > > /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0.GstGhostPad:
> > > > >si nk.G
> > > > >
> > > > > > >stProxyPad:proxypad1: caps = video/x-raw-yuv, width=(int)704,
> > > > > > > height=(int)576,
> > > > > > > framerate=(fraction)30000/1, format=(fourcc)I420,
> > > > > > > interlaced=(boolean)false,
> > > > > > > pixel-aspect-ratio=(fraction)12/11
> > > > > > > ERROR: from element
> > > > >
> > > > > /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstXvImageSi
> > > > >nk
> > > > >
> > > > >:aut
> > > > >:
> > > > > > >ovideosink0- actual-sink-xvimage: Output window was closed
> > > > > > > Additional debug info:
> > > > > > > xvimagesink.c(1297): gst_xvimagesink_handle_xevents ():
> > > > >
> > > > > /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstXvImageSi
> > > > >nk
> > > > >
> > > > >:aut
> > > > >:
> > > > > > >ovideosink0- actual-sink-xvimage
> > > > > > > Execution ended after 5239190321 ns.
> > > > > > > Setting pipeline to PAUSED ...
> > > > > > > Setting pipeline to READY ...
> > > > >
> > > > > /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstXvImageSi
> > > > >nk
> > > > >
> > > > >:aut
> > > > >:
> > > > > > >ovideosink0- actual-sink-xvimage.GstPad:sink: caps = NULL
> 
> /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0.GstGhostPad:sink:
> > > > > > > caps
> > > > > > > = NULL
> > > > > > > /GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstGhostPad:src0
> > > > > > >: caps = NULL
> > > > >
> > > > > /GstPipeline:pipeline0/GstDecodeBin:decodebin0/ffdec_mpeg4:ffdec_mp
> > > > >eg 40.G
> > > > >
> > > > > > >stPad:src: caps = NULL
> > > > >
> > > > > /GstPipeline:pipeline0/GstDecodeBin:decodebin0/ffdec_mpeg4:ffdec_mp
> > > > >eg 40.G
> > > > >
> > > > > > >stPad:sink: caps = NULL
> > > > >
> > > > > /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:t
> > > > >yp efin
> > > > >
> > > > > > >d.GstPad:src: caps = NULL
> > > > > > > Setting pipeline to NULL ...
> > > > > > > Freeing pipeline ...
> > > > > > >
> > > > > > > but the video is distorced as you can see in the image
> > > > > > > attached, I
> > > > >
> > > > > setted
> > > > >
> > > > > > > the
> > > > > > > intra interval (I Frame every X Frames) to 5 but also changing
> > > > > > > this
> > > > >
> > > > > value
> > > > >
> > > > > > > to 0
> > > > > > > or 120 make no difference,
> > > > > > >
> > > > > > > any hints?
> > > > > > >
> > > > > > > Nicola
> > > > >
> > > > > -------------------------------------------------------------------
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