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[devel] streaming h264

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Terry Leung-2

[devel] streaming h264

Hi all,

I am writing a rtsp server to stream h264 rtp packet
I use lve555 to write the rtsp part and gstreamer for streaming the rtp
I use vlc to act as a rtsp client

The rtsp part is working well(by capturing the packet in between)
but the video cannot be seen

Here is the pipeline i used: (jill.3gp is a video file encoded in h263)
gst-launch --gst-debug-level=2 -v -m filesrc
location=/home/terry/jill.3gp ! qtdemux name=demuxer \
demuxer.! queue ! ffdec_h263 ! x264enc byte-stream=true ! rtph264pay
! udpsink host=192.168.0.125 port=4760

I suspect, this is related to the parameter in the sdp,
profile_level_id and sprop_parameter_sets_str
What's the suitable value for these two parameter are suitable for the
x264enc used in gstreamer?

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Wai-Ming Ho

Re: [devel] streaming h264

Hi,

normally, using the latest CVS source for rtph264pay (in
gst-plugins-good/gst/rtp) , you should be able to retrieve the
sprop-parameter-sets in the negotiated caps. However, VLC should be
robust enough to not require sprop-parameter-sets to display video from
an RTP source. I just verified that on my ubuntu feisty environment.

you should be able to use a simple SDP for the video stream like the
template below (replace the appropriate values in profile-level-id and
sprop-parameter-sets with the ones you see in the caps traces). If you
don't have the sprop-parameter-sets/profile-level-id, just leave them
out completely.

v=0
o=- 12345 1 IN IP4 0.0.0.0
s=foobar
c=IN IP4 192.168.0.125
m=video 4760 RTP/AVP 96
a=rtpmap:96 H264/90000
a=fmtp:96 profile-level-id=<see_caps>; sprop-parameter-sets=<see_caps>;
packetization-mode=1

of course, always verify that you do have video coming out of the
decoder by checking either with an xvimagesink or fakesink dump=1:

gst-launch -v -m filesrc location=/home/terry/jill.3gp ! qtdemux
name=demuxer \
demuxer.! queue ! ffdec_h263 ! queue ! xvimagesink

if you don't see anything coming out of your decoder, this could be the
reason.

HTH,
waiming

>
>
On Thu, 2008-01-24 at 15:02 +0800, Terry Leung wrote:

> Hi all,
>
> I am writing a rtsp server to stream h264 rtp packet
> I use lve555 to write the rtsp part and gstreamer for streaming the rtp
> I use vlc to act as a rtsp client
>
> The rtsp part is working well(by capturing the packet in between)
> but the video cannot be seen
>
> Here is the pipeline i used: (jill.3gp is a video file encoded in h263)
> gst-launch --gst-debug-level=2 -v -m filesrc
> location=/home/terry/jill.3gp ! qtdemux name=demuxer \
> demuxer.! queue ! ffdec_h263 ! x264enc byte-stream=true ! rtph264pay
> ! udpsink host=192.168.0.125 port=4760
>
> I suspect, this is related to the parameter in the sdp,
> profile_level_id and sprop_parameter_sets_str
> What's the suitable value for these two parameter are suitable for the
> x264enc used in gstreamer?
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2008.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel

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Defy all challenges. Microsoft(R) Visual Studio 2008.
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Terry Leung-2

Re: [devel] streaming h264

Hi,

Thanks for your help

I just try to delete the sprop-parameter-sets and profile id in the
sdp because i cannot see it in caps and now it works fine.

(One of the problem was that i cannot generate the stream fast enough
before the session was teardowned and hence the stream cannot be seen
)

Regards,
Terry

On Jan 24, 2008 5:08 PM, Wai-Ming Ho <[hidden email]> wrote:

> Hi,
>
> normally, using the latest CVS source for rtph264pay (in
> gst-plugins-good/gst/rtp) , you should be able to retrieve the
> sprop-parameter-sets in the negotiated caps. However, VLC should be
> robust enough to not require sprop-parameter-sets to display video from
> an RTP source. I just verified that on my ubuntu feisty environment.
>
> you should be able to use a simple SDP for the video stream like the
> template below (replace the appropriate values in profile-level-id and
> sprop-parameter-sets with the ones you see in the caps traces). If you
> don't have the sprop-parameter-sets/profile-level-id, just leave them
> out completely.
>
> v=0
> o=- 12345 1 IN IP4 0.0.0.0
> s=foobar
> c=IN IP4 192.168.0.125
> m=video 4760 RTP/AVP 96
> a=rtpmap:96 H264/90000
> a=fmtp:96 profile-level-id=<see_caps>; sprop-parameter-sets=<see_caps>;
> packetization-mode=1
>
> of course, always verify that you do have video coming out of the
> decoder by checking either with an xvimagesink or fakesink dump=1:
>
> gst-launch -v -m filesrc location=/home/terry/jill.3gp ! qtdemux
> name=demuxer \
> demuxer.! queue ! ffdec_h263 ! queue ! xvimagesink
>
> if you don't see anything coming out of your decoder, this could be the
> reason.
>
> HTH,
> waiming
>
>
> >
> >
> On Thu, 2008-01-24 at 15:02 +0800, Terry Leung wrote:
> > Hi all,
> >
> > I am writing a rtsp server to stream h264 rtp packet
> > I use lve555 to write the rtsp part and gstreamer for streaming the rtp
> > I use vlc to act as a rtsp client
> >
> > The rtsp part is working well(by capturing the packet in between)
> > but the video cannot be seen
> >
> > Here is the pipeline i used: (jill.3gp is a video file encoded in h263)
> > gst-launch --gst-debug-level=2 -v -m filesrc
> > location=/home/terry/jill.3gp ! qtdemux name=demuxer \
> > demuxer.! queue ! ffdec_h263 ! x264enc byte-stream=true ! rtph264pay
> > ! udpsink host=192.168.0.125 port=4760
> >
> > I suspect, this is related to the parameter in the sdp,
> > profile_level_id and sprop_parameter_sets_str
> > What's the suitable value for these two parameter are suitable for the
> > x264enc used in gstreamer?
> >
> > -------------------------------------------------------------------------
> > This SF.net email is sponsored by: Microsoft
> > Defy all challenges. Microsoft(R) Visual Studio 2008.
> > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> > _______________________________________________
> > gstreamer-devel mailing list
> > [hidden email]
> > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>