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H.264 video streaming via RTP from Live555 to VLC

I will be very grateful if you can help me with the problem of H264 streaming, which I tried to solve in a few weeks.

I need to transfer H264 video from Live555 (on a Linux machine) to VLC Media Player (on a Windows machine). It works very well with RTSP, but I need to use RTP without RTSP, and with RTP I do not see the video. VLC does not even recognize that the stream is H264.

This is the SDP file transmitted via RTSP (working configuration):

v=0 o=- 1277647151953158 1 IN IP4 190.40.14.100 s=Session streamed by "testH264VideoAudioStreamer" i=test-h264-mux.mpg t=0 0 a=tool:LIVE555 Streaming Media v2007.05.24 a=type:broadcast a=control:* a=source-filter: incl IN IP4 * 190.40.14.100 a=rtcp-unicast: reflection a=range:npt=0- a=x-qt-text-nam:Session streamed by "testH264VideoAudioStreamer" a=x-qt-test-inf:test-h264=mux.mpg m=video 8554 RTP/AVP 96 c=IN IP4 190.40.15.63/7 a=rtpmap:96 H264/90000 a=fmtp:96 packetization-mode=1;profile-level-id=000042;sprop-parameter-sets=H264 a=control:track1

But if I switch from RTSP to RTP, this will not work. I tried loading the above SDP file into a VLC player, but this does not help.

Here is part of the debug output of VLC Player 0.8.6d:

 main input debug: thread 4016 (input) created at priority 1 (input/input.c:265) main input debug: `rtp://@190.40.15.63:8554' gives access `rtp demux' `' path `@190.40.15.63:8554' main input debug: creating demux: access='rtp' demux='' path='@190.40.15.63:8554' main demuxer debug: looking for access_demux module: 0 candidates main demuxer warning: no access_demux module matched "rtp" main input debug: creating access 'rtp' path='@190.40.15.63:8554' main access debug: looking for access2 module: 6 candidates access_udp access debug: opening server=:0 local=190.40.15.63:8554 main access debug: net: connecting to '[]:0@[190.40.15.63]:8554 main access debug: looking for netrowk module: 1 candidate ipv6 access debug: 190.40.15.63: Host or service not found main access debug: using network module "ipv6" main access debug: removing network module "ipv6" main access debug: looking for netrowk module: 1 candidate ipv4 access debug: resolving 190.40.15.63:8554... ipv4 access debug: resolving :0... main access debug: using network module "ipv4" main access debug: removing network module "ipv4" main access debug: using access2 module "access_udp" main private debug: pre buffering access_udp access debug: no RTP header detected main input debug: creating demux: access='rtp' demux='' path='@190.40.15.63:8554' main demuxer debug: looking for demux2 module: 45 candidates ts demuxer warning: TS module discarded (lost sync) ffmpeg demuxer debug: detected format: mp3

(There may be typos, because I had to copy them manually - do not ask :))

In VLC 1.0.5, I get an unknown payload error, and SDP cannot be loaded at all due to an Unknown Network Stack error. Other errors displayed: SDP connection information is not supported and Sap Damper Warning: Invalid SDP .

Any help would be greatly appreciated!

Thanks,

Ilya

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video-streaming live rtp vlc
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1 answer

I needed to use an SDP file instead of directly opening a stream. It turns out that SDP data is only transmitted when using RTSP. When streaming RTP, I must provide the SDP file myself.

So what I did:

  • Stream with RTSP (a method that works)
  • Use Wireshark to write an SDP file transferred via RTSP,
  • Save the SDP as a text file with the extension .sdp,
  • In VLC, open the SDP file instead of directly opening the network stream.

And it was magic!

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