RTP/UDP streaming only first frame

[Carlos]

Hi guys,

I am going nuts with this problem basically because I am not familiar with streaming further than what I searched for trying to stream real time video in a local network.

I am working with a Raspberry Pi 3 with a Pi NOIR V2 camera and this is my pipeline:

raspivid -t 0 -w 640 -h 480 -fps 30 -b 2000000 -hf -vf -ex auto -awb auto -o - | \
gst-launch-1.0 -v fdsrc \
  ! "video/x-h264, width=(int)640, height=(int)480, framerate=(fraction)30/1" \
  ! queue \
  ! h264parse \
  ! rtph264pay \
      config-interval=1 \
      pt=96 \
  ! udpsink \
      sync=false \
      host=192.168.1.255 \
      port=5004 \
      bind-address=192.168.1.99 \
      bind-port=5004 \
      auto-multicast=true \
      multicast-iface=eth0 \

And here is my SDP file for VLC on my PC:

v=0
c=IN IP4 192.168.1.99
t=0 0
a=recvonly
a=type:broadcast
a=charset:UTF-8
m=video 5004 RTP/AVP 96
b=RR:0
a=rtpmap:96 H264/90000

The problem is that VLC only catches the first frame. If I stop and play again from VLC it refreshes to a new frame - the video seems to be playing but the image is frozen. Does anybody know what is happening?

Thanks in advance!

[Myzhar]

Hi Carlos,

as far as I know it is a bug in the Live555 library used by VLC to receive RTP streams. I have the same issue, I can corretly receive my RTP stream using gst-play or gst-launch, but only the first frame with VLC.

Walt

2016-11-22 18:13 GMT+01:00 Carlos <[hidden email]>:

Hi guys,

I am going nuts with this problem basically because I am not familiar with
streaming further than what I searched for trying to stream real time video
in a local network.

I am working with a Raspberry Pi 3 with a Pi NOIR V2 camera and this is my
pipeline:



And here is my SDP file for VLC on my PC:



The problem is that VLC only catches the first frame. If I stop and play
again from VLC it refreshes to a new frame - the video seems to be playing
but the image is frozen. Does anybody know what is happening?

Thanks in advance!

<http://gstreamer-devel.966125.n4.nabble.com/file/n4680828/pipeline.png>



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[Carlos]

Thank you very much, Walter. I also tried to catch the streaming from another Raspberry via gst-launch but the file produced cannot be played back on VLC. This is the pipeline I used:

gst-launch-1.0 udpsrc \
    port=5004 \
    multicast-iface=wlan0 \
    caps="application/x-rtp, \
        media=(string)video, \
        clock-rate=(int)90000, \
        encoding-name=(string)H264, \
        payload=(int)96" \
    ! rtph264depay \
    ! filesink location=video.h264

Both Rapsberries are connected to an independant wi-fi router and the one acting as a server is also wired to another network via Ethernet. I changed the parameters in the server pipeline in order to match this situation (host=192.168.0.255 bind-address=192.168.0.99 multicast-iface=wlan0). Can you see what I am doing wrong? Thanks in advance!

[Myzhar]

I had a similar issue on the Nvidia Jetson TK1. If I remember well both the boards use the same H264 compression hardware. If you are using H264 compression maybe that the source is not sending the PPS.

Try to add "insert-sps-pps=true" to "omxh264enc" if you are using it.

About "multicast-iface" you must use it only if you create a multicast group, otherwise the simple IP address identifies the correct net card.

Walt

2016-11-23 8:55 GMT+01:00 Carlos <[hidden email]>:

Thank you very much, Walter.

I also tried to catch the streaming from another Raspberry via gst-launch
but the file produced cannot be played back on VLC. This is the pipeline I
used:



Both Rapsberries are connected to an independant wi-fi router and the one
acting as a server is also wired to another network via Ethernet. I changed
the parameters in the server pipeline in order to match this situation
(host=192.168.0.255 bind-address=192.168.0.99 multicast-iface=wlan0).

Can you see what I am doing wrong?

Thanks in advance!



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