One thing that’s great about your channel is that the content isn’t as ephemeral as it is on many channels. I can come back and watch this series several times over and it will still be relevant.
Would be awesome to extend these videos for ~4 mins to 8 mins or so walking through the AP configuration showing where on your particular model how to convert multicast to unicast. As always though, excellent content. Another topic might be wroth expanding is using this information from the ground up and building a complete multi media TV station streaming all possible channels and how to setup the server and the client. Walking through the switch you use, devices you use, etc.
Every vendor would have a different way of doing it. The principle is the same though, as long as the wireless controller converts it to unicast before it's sent out of the AP, then it should be good as you saw.
@@TallPaulTech Then maybe you should have mentioned that bit in the video!... Don't get me wrong, I love this series, but while interesting, I barely learned anything form the last one.
@@TallPaulTech So the command is performed on the AP? Or the Raspberry Pi? I still don't understand. -- edit: I see from your comment that you said the wireless controller converts it to unicast. So it's a configuration param in the AP/Wireless controller. Got it...
Switching to unicast will help with a few clients but you lose the advantage of multicast. Environments like campuses and stadiums benefit from actual multicast for live video.
will there be a video on showing how to do this in a home environment without flooding the network, could it be as easy as just buying a cheap used enterprise switch with your server and maybe a wifi switch connected to it or do you need the whole network running from enterprise gear?
Hi why a multicast frame got so low speed ( 802.11a) it is related to speed negotiated between AP and wireless NIC,or is it a fixed transmission standard for multicast(802.11a) not related to the unicast standard (802.11 ac) ?
The spec is multicast frames use the lowest supported channel rate enabled on the ap. I setup a video specific network and disable lower profiles to get a bit better video performance with a range tradeoff.
I wonder if there is a way to see what the lowest data rate of clients connected to the multicast group are and instead use that? Seems like a waste to throw away the main benefit of multicast, if you just use unicast anyway, and especially over the air where there's less shared bandwidth than wired.
You can fit many high speed unicast transmissions in the space of a single low speed multicast one. This sort of thing is configured in the wireless controller. For low data stuff it's not an issue. For video it is. Believe me, it's way more efficient as high rate unicast.
Yeah but you still won't get packet acknowledgement with multicast over wifi. You might get bigger bitrate with your idea, but if packets are lost you'll still get mpeggy artefacts in your picture and audio.
Since Australia is a DVB country, there's a thing called SAT>IP. It feeds satellite signals to the server and hosts it as a stream. Watch whether it supports multicast.
This is about Wi-Fi. Multicast frames in Wi-Fi go at a lower rate (as shown in Wireshark in this video). That takes more air time. All other frames have to wait longer to transmit. It most definitely slows down a Wi-Fi network, hence it's to be avoided (by converting to unicast Wi-Fi frames).
CWNE88 ok pls show in wireshark the parameters and slowdown you are sure of. (I repeat, it is NOT a WiFI rule/issue, but simple intrinsic higher LATENCY!!!).
One thing that’s great about your channel is that the content isn’t as ephemeral as it is on many channels. I can come back and watch this series several times over and it will still be relevant.
Thanks mate :)
Would be awesome to extend these videos for ~4 mins to 8 mins or so walking through the AP configuration showing where on your particular model how to convert multicast to unicast. As always though, excellent content.
Another topic might be wroth expanding is using this information from the ground up and building a complete multi media TV station streaming all possible channels and how to setup the server and the client. Walking through the switch you use, devices you use, etc.
Again - well done! Really cranking out the content lately - nice work!
Great Vid! - How did you convert the stream to unicast ? What command did you have to run?
Every vendor would have a different way of doing it. The principle is the same though, as long as the wireless controller converts it to unicast before it's sent out of the AP, then it should be good as you saw.
@@TallPaulTech Then maybe you should have mentioned that bit in the video!... Don't get me wrong, I love this series, but while interesting, I barely learned anything form the last one.
@@TallPaulTech So the command is performed on the AP? Or the Raspberry Pi? I still don't understand. -- edit: I see from your comment that you said the wireless controller converts it to unicast. So it's a configuration param in the AP/Wireless controller. Got it...
Switching to unicast will help with a few clients but you lose the advantage of multicast. Environments like campuses and stadiums benefit from actual multicast for live video.
wow this is so awesome, now to get my hands on some hardware
is there a WIRELESS MULTICAST SOLUTION?
will there be a video on showing how to do this in a home environment without flooding the network, could it be as easy as just buying a cheap used enterprise switch with your server and maybe a wifi switch connected to it or do you need the whole network running from enterprise gear?
All in good time my son... gotta finish the main multicast event first!
@@TallPaulTech I attempted this a few years back when you did it. Crippled my internet
Hi why a multicast frame got so low speed ( 802.11a) it is related to speed negotiated between AP and wireless NIC,or is it a fixed transmission standard for multicast(802.11a) not related to the unicast standard (802.11 ac) ?
The spec is multicast frames use the lowest supported channel rate enabled on the ap. I setup a video specific network and disable lower profiles to get a bit better video performance with a range tradeoff.
Why my VLC disconnect the stream if some packets get lost ?
i did not see how you enable unicast?
I wonder if there is a way to see what the lowest data rate of clients connected to the multicast group are and instead use that? Seems like a waste to throw away the main benefit of multicast, if you just use unicast anyway, and especially over the air where there's less shared bandwidth than wired.
You can fit many high speed unicast transmissions in the space of a single low speed multicast one. This sort of thing is configured in the wireless controller. For low data stuff it's not an issue. For video it is. Believe me, it's way more efficient as high rate unicast.
Yeah but you still won't get packet acknowledgement with multicast over wifi. You might get bigger bitrate with your idea, but if packets are lost you'll still get mpeggy artefacts in your picture and audio.
Now mate, tell us how we can do this with a VAST satellite tv service, for those of us in Australia without terrestrial TV services. 😃
I've never touched satellite. It should be roughly the same though with a dvb-s adapter I believe.
Since Australia is a DVB country, there's a thing called SAT>IP. It feeds satellite signals to the server and hosts it as a stream. Watch whether it supports multicast.
Multicast does not slowdown traffic!!!
It is the intrinsic properties of Ethernet and WiFi that slow it down...
This is about Wi-Fi. Multicast frames in Wi-Fi go at a lower rate (as shown in Wireshark in this video). That takes more air time. All other frames have to wait longer to transmit. It most definitely slows down a Wi-Fi network, hence it's to be avoided (by converting to unicast Wi-Fi frames).
CWNE88
ok pls show in wireshark the parameters and slowdown you are sure of.
(I repeat, it is NOT a WiFI rule/issue, but simple intrinsic higher LATENCY!!!).
Watch the video again. I pointed out the frame rates in Wireshark.
@@pepeshopping wifi spec says multicast forces lowest configured channel rate on ap, not even lowest used by connected clients.
Access point with multicast optimization?
Better solution: Abandon wireless for anything besides handheld devices.