unable to decode multicasting issue from gstreamer rtsp server

[Jake Zhang]

I am using rtsp sever 1.10.0

Even for the ./test_multicast example, VLC and ffmpeg is unable to decode the video. 

If I use wireshark to capture all the pkts, I can extra the correct video data out of pcap data.

I was suspecting my network setting has issue, but if I use another rtsp streaming 

server like live555 of ffserver, I have no issue. 

I also tried using udpsink to do multicasting, also works, so I am kind of confused why typical rtsp demuxers like vlc or ffmpeg is unable to decode the video. 

Nothing looks wrong from log.

Any ideas what I am missing here?

Thanks 

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[Jake Zhang]

Any data point. I redirect mutlcasting to go to loopback device by doing below and got same results. 

route add -net 224.0.0.0 netmask 240.0.0.0 dev lo

ifconfig lo multicast

tcpdump and wireshark shows gstreamer rtsp server is outputting correct data but VLC and ffmpeg is unable to demux/decode them. All rtsp handsharking part was complete (DESCRIBE/SETUP/PLAY) without issue. Media is prerolled and played. 

On Tue, Nov 29, 2016 at 8:34 PM, Jake Zhang <[hidden email]> wrote:

I am using rtsp sever 1.10.0

Even for the ./test_multicast example, VLC and ffmpeg is unable to decode the video. 

If I use wireshark to capture all the pkts, I can extra the correct video data out of pcap data.

I was suspecting my network setting has issue, but if I use another rtsp streaming 

server like live555 of ffserver, I have no issue. 

I also tried using udpsink to do multicasting, also works, so I am kind of confused why typical rtsp demuxers like vlc or ffmpeg is unable to decode the video. 

Nothing looks wrong from log.

Any ideas what I am missing here?

Thanks 

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[hidden email]
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