[gst-devel] Unable to stream H264 over RTP

[Fabio Estevam]

--- On Fri, 5/8/09, ScreenName01 <lwhlee at hotmail.com> wrote:

> From: ScreenName01 <lwhlee at hotmail.com>
> Subject: [gst-devel]  Unable to stream H264 over RTP
> To: gstreamer-devel at lists.sourceforge.net
> Date: Friday, May 8, 2009, 2:37 PM
> Hello all,
> 
>   I've had pretty good success with RTSP server and
> able to stream H264,
> H263 and Mpeg4 streams over to VLC for instance.
> 
>   I want to maximize my options and tried straight TCP for
> instance and was
> only able to get the ffplay player to play the tcp stream
> but only for H263. 
> This is probably irrelevant information though.
> 
>   What I'm trying to get working is RTP.  So I'm
> able to stream MP4 using
> the following pipeline where VPU encoder is a hardware
> based encoder capable
> of encoding mp4, h264 and h263.
> 
> gst-launch-0.10 -v v4l2src ! vpuenc codec-type=std_mpeg4
> width=640
> height=480 ! rtpmp4vpay ! udpsink host=<stream_to_ip>
> port=5000
> 
>   With the following SDP file:
> ---  SDP START ---
> v=0
> s=Session streamed with GStreamer
> i=live
> t=0 0
> a=tool:Gstreamer
> m=video 5000 RTP/AVP 96
> b=RR:0
> c=IN IP4 127.0.0.1
> a=rtpmap:96 MP4V-ES/90000
> a=fmtp:96 profile-level-id=4;
> config=000001b004000001b59113000001000000012000c888800f514043c14103
> a=cliprect:0,0,480,640
> a=framesize:96 640-48
> ---  SDP END ---
> 
>   I can launch this SDP file with QuickTime and VLC and it
> streams fine.
> 
>   The problem is I cannot stream H264 or H263.  I use the
> same pipeline as
> above with codec-type parameter changed to h264 or H263 and
> using a similar
> SDP file (without the a=fmtp ... line) and changed the
> rtpmap from MP4V-ES
> to H264/H263 but I've had no luck.
> 
>   I end up with just a plain green screen in QuickTime. 
> VLC doesn't even
> play the stream.
> 
>   I've tried to modify the stream to something using
> RTP manager.  To
> something like below for instance.
> 
> gst-launch -v gstrtpbin name=rtpbin latency=50 v4l2src !
> vpuenc
> codec-type=std_avc width=640 height=480 ! rtph264pay pt=96
> mtu=1438 !
> rtpbin.send_rtp_sink_0 rtpbin.send_rtp_src_0 ! udpsink
> port=5000
> host=<stream_to_ip> ts-offset=0
> rtpbin.send_rtcp_src_0 ! udpsink port=5001
> host=<stream_to_ip> sync=false async=false udpsrc
> port=5005 !
> rtpbin.recv_rtcp_sink_0
> 
>   Using just a plain SDP file like below (found in GIT as
> an example):
> --- SDP Start ---
> v=0
> o=- 1188340656180883 1 IN IP4 127.0.0.1
> s=Session streamed by GStreamer
> i=server.sh
> t=0 0
> a=tool:GStreamer
> a=type:broadcast
> m=video 5000 RTP/AVP 96
> c=IN IP4 127.0.0.1
> a=rtpmap:96 H264/90000
> --- SDP End ---
> 
>   QuickTime is stuck waiting to connect, VLC is unable to
> connect as well.
> 
>   Is there something I can try to get it to stream H264
> over just RTP.  I
> know the RTSP server is able to stream any of the three
> formats
> (H264/H263/MP4) so it must be generating the proper SDP
> file I'm guessing? 
> Any suggestions?
> 
> Thanks in advance.  Any and all suggestions welcomed and
> appreciated!

I assume you are using MX27 processor, correct? If so, please check the following application note: http://www.freescale.com/files/dsp/doc/app_note/AN3677.pdf

Regards,

Fabio Estevam