udpsrc does not work on 2 NIC & Port mirror linux setup
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I've tried a lot of stuff, but I can't seem to get it to work. (Same problem
exists with ffmpeg/vlc) Basically, I can't get the UDP Stream directly into a videotool. I can verify the data coming in through tcpdump/wireshark etc. and i can also create the videofiles through gstreamer/ffmpeg afterwards, but I can't use the udp source as input. The current setup is the following: The camera streams MJPEG through UDP to a fixed address & port. I port mirrored the data from the camera, so that I can verify the data coming in through wireshark on a 3rd device. The reason behind doing this is that multicast is not supported, so I need a way to get the data on 2 devices through unicast. Port mirroring seemed like a viable solution. Am I missing something here? What do I need to do to get this working? I thought maybe it's due to the two networkinterface setup as I use 1x usb to ethernet for the port mirror and 1x ethernet for the web, but disconnecting the other shows no difference. The routing seems correct too: "ip route get camera.ip" returns that the routing is through the usb to ethernet on my static ip. Example of an attempt: Gst-launch-1.0 udpsrc port=streamingport(confirmed through wireshark) ! jpegdec ! videorate ! video/x-raw,framerate=30/1 ! autovideosink (does not work) Gst-launch-1.0 filesrc location=hexdumpfile.txt ! jpegdec ! videorate ! video/x-raw,framerate=30/1 ! autovideosink (does work) -- Sent from: http://gstreamer-devel.966125.n4.nabble.com/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: udpsrc does not work on 2 NIC & Port mirror linux setup
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Couple of questions to help you out. I assume you have two interfaces 1) What is the IP source address of the stream you are seeing with Wireshark, but not receiving with udpsrc? 2) What is the interface you are seeing the stream coming in on? 3) What is your routing table saying for routing to the source address in 1) Now assume your host with multiple interfaces is Linux. If it is not, then much of the text below may or may not apply. You (applications) will by default not get UDP packets from X seen/received on interface B from your IP stack if your routing table says the address X is reachable via interface A. By default a linux host with multiple interfaces has a single shared routing table. If you want to use a single shared routing table and are seeing packets from X on interface B while your routing table says X is reachable through interface A, then change your routing table or make sure the packets are coming in on interface A instead og interface B If that is not possible, use Google to discover how to setup multiple routing tables on a single linux host. That way you can define individual routing table for interface A and define another routing table for interface B. That way you can tell that packets from X can arrive on interface B while you prefer reaching X via interface A. If this is how you want it, then you may add to your routing table for interface B that X can be reached via X (set metric so interface A is still preferred for reaching X, if that is what you want). You may want to configure it so traffic send from X to IP address of B is responded to via interface B even though your linux host may overall prefer to reach X via interface A. Please note, just adding a secondary routing entry with a higher metric for destination X via interface A while maintaining a preferred routing with lower metrix via interface A for reaching destination X, WILL NOT HELP YOU. So either change routing (keeping one routing table) or setup individual routing tables for each interface. Best Regards Peter Maersk-Moller On Thu, Jan 28, 2021 at 6:55 PM kepitto <[hidden email]> wrote: I've tried a lot of stuff, but I can't seem to get it to work. (Same problem _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: udpsrc does not work on 2 NIC & Port mirror linux setup
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A couple of major corrections. Please ignore previous mail as it had at least two serious errors/mix-ups. Couple of questions to help you out. I assume you have two interfaces 1) What is the IP source address of the stream you are seeing with Wireshark, but not receiving with udpsrc? 2) What is the interface you are seeing the stream coming in on? 3) What is your routing table saying for routing to the source address in 1) Now assume your host with multiple interfaces is Linux. If it is not, then much of the text below may or may not apply. If it is Windows, I don't care. You
(applications) will by default not get UDP packets from X seen/received
on interface B from your IP stack if your routing table says the
address X is reachable via interface A. By
default a linux host with multiple interfaces has a single shared
routing table. If you want to use a single shared routing table and are
seeing packets from X on interface B while your routing table says X is
reachable through interface A, then change your routing table so you reach X via B or make
sure the packets are coming in on interface A instead of interface B. Basically make sure UDP packets are arriving on the interface the source address is reachable via. If
that is not possible, use Google to discover how to setup multiple
routing tables on a single linux host. That way you can define
an individual routing table for interface A and define another routing
table for interface B. That way you can define that packets from X can
arrive on interface B while you prefer reaching X via interface A. If
this is how you want it, then you may add to your routing table for
interface B that X can be reached via B (set metric so interface A is
still preferred for reaching X, if that is what you want). You may want
to configure it so traffic sent from X to IP address of B is responded
to X via interface B (and not A) even though your linux host may overall prefer to
reach X via interface A. Please note, just
adding a secondary routing entry with a higher metric for destination X
via interface B while maintaining a preferred routing with lower metrix
via interface A for reaching destination X, WILL NOT HELP YOU. So either change routing (keeping one routing table) or setup individual routing tables for each interface. Best Regards Peter Maersk-Moller On Thu, Jan 28, 2021 at 7:31 PM Peter Maersk-Moller <[hidden email]> wrote:
_______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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First of all thanks for taking your time.
1) 192.168.0.100 2) The correct interface, which I connected. (USB to Ethernet) 3) It is correctly routed through the USB to Ethernet as configured. (device is set to 192.168.0.1 static IP) After posting I think I already resolved that it is not related to the multiple network interfaces. Things I did to confirm: -As mentioned the routing is set up correctly. -I tried both interfaces and could confirm on Wireshark both that udp packets were coming in. -I disconnected the other interface and ran on both with only 1 connected. The only thing I'm unsure of is that due to the way I have to activate the camera I get a different MAC Address, but according to my knowledge the MAC Address is not important as long as I get the correct IP and receive the packets on wireshark right? -- Sent from: http://gstreamer-devel.966125.n4.nabble.com/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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