[gst-devel] RTMP streaming in web page

[julien.lengrand-lambert at advansee.com]

Hi everyone, 


This is my first post as a gstreamer user, so feel free to correct me :)

I am currently trying to develop a web interface for an ARM platform, in which is embedded an optical captor. 

I am able to stream video for the host to a desktop computer without any problem. Here is an example that works : 
gst-launch udpsrc port=1234 ! gdpdepay ! ffdec_mpeg4 ! sdlvideosink sync=false on the PC side, and then
gst-launch v4l2src ! video/x-raw-yuv,width=640,height=480,format='(fourcc)'YV12 ! mfw_mpeg4encoder ! gdppay ! udpsink host=192.168.0.10 port=1234 on the platform. 


The idea is now to use RTMP so that the stream can be outputed in a web page using the vlc plugin. 
For that, the command line on the camera is : 
gst-launch -v v4l2src ! video/x-raw-yuv,width=640,height=480,format='(fourcc)'YV12 ! mfw_mpeg4encoder ! rtpmp4vpay send-config=true ! udpsink host=192.168.0.10 port=1234
(where mfw_mpeg4encoder is an embedded hardware encoder)

I use a configuration file stream.sdp :
v=0
m=video 1234 RTP/AVP 96
c=IN IP4 192.168.0.10
a=rtpmap:96 MP4V-ES/90000
a=fmtp:96 profile-level-id=245,config=000001b0f5000001b5090000010000000120008440
a=cliprect:0,0,480,640
a=framesize:96 640-480

And I feed Vlc with this file to get the streaming. 

It works fine, as long as I set Vlc first, and then launch the gstreamer command line. 
If the streaming is already started, Vlc detects the stream but is unable to display any data. 

Same case if the stream is outputed, then stopped and started again. 


Which means that each time, I need to set Vlc up first, and then start the streaming. And to do it again, I have to fully close vlc and start over completely.

The same phenomenon appears when using gstreamer itself instead of vlc to catch the stream : 
gst-launch playbin uri=file:///home/jlengrand/Desktop/Dropbox/Taf/stream.sdp


could someone please help me on this? 
I would really like to be able to stop and start more than one streaming whitout closing my client. And most of all, I would appreciate is the client could receive a streaming that has already started ! 


Any suggestions are welcome ! ! 

Thanks and Greetings 

Julien


-- 
-- 
Julien Lengrand-Lambert
tel: +33 (0)240 50 21 73

ADVANSEE
9 rue Alfred Kastler
CS30750, 44307 Nantes Cedex 3
http://www.advansee.com