Which wireless video transmission system is better?

Recently, I spent a good amount of time figuring out which system would work best for my new live-streaming system. First I started off watching YouTube videos and online reviews, they helped narrow down my decision to either the Holland Cosmo or the Accsoon CIneeye 2s Pro.   I decided to buy one of each and figure it out for myself.  I made my own video based on latency and range tests which you can watch below.  

If you are interested in purchasing any of the products in this video, please use the affiliate links below. This helps support my ability to continue making tech review videos.

Hollyland Cosmo:


Accsoon Cineeye 2sPro


URSA Broadcast G2


Blackmagic 6K Pro


Atem Mini Extreme ISO



Hey!  This is Horacio from Cinema Viva, and Cinema Viva

Tech Talks. I recently decided to upgrade

my wireless video transmission system, and I set out to look for a system

under $1,000 and with low latency. After reading and watching various

reviews online, the top two contenders were the Accsoon 2s pro

and the Hollyland Cosmo. Both had their merits, but ultimately what I was looking for

was low latency and reliability. I’ll tell you which system

I decided on at the end of the video. Now, this isn’t meant to be

an all encompassing review of each system. There’s plenty of videos

like that on YouTube already. For this video,

I’m going to focus on my latency test that it came up with

and a range of transmission tests. Actually, while recording this,

we’re using two  Accsoon 2s Pro systems on both cameras

to record the session. This is all purely unscientific,

but these tests make sense to me. Ready? Here we go.  


Step one. The first test is all about latency. My first step was to create a 60p

timeline in Premiere to use for measuring. I played back the 60p timeline

on my new MacBook Pro and filmed that for reference. All these videos you’re about to see

were recorded in 59.94 frames per second. At that frame rate, one frame equals

16 milliseconds. That’s one frame equals 16 milliseconds. 16 milliseconds. I decided to use my Ursa G2 since it has 2 SDI outs. One SDI out was connected to the Cosmo

while the other one was connected to a bi directional converter

and then to the ATEM via HDMI. Additionally,

I filmed the same setup with another 6K Pro recording at 60p. Let’s stop and look at this more closely. On this frame you can see that on the left

is the recording of the Hollywood Cosmo, and on the right

is the recording of the Wired connection from the laptop to the Wired Connection

is a difference of 7 frames. While there is an 11 frame difference

between the laptop and the Cosmo, that’s a four frame delay

between the wired and wireless connection. 11 – 7 = 4. Let’s see what this looks like

in Premiere. Here’s a screen recording

showing the four frame difference too my hands come together at 6:24 on the left, and you can see on the wireless connection on the right. That the hands come together

for friends later at 6:28. Even though the HollyLand is marketed

as having less than 40 milliseconds of latency. In this test

I measured it at 64 milliseconds. Next, I tested the two wireless units side

by side. Both connected to SDI outputs on the Ursa

Broadcast G2. What surprised me is that the audio comes in five

to seven frames later on both systems. Take a look here  here is where the hands come together. And then one, two, three, four, five. Right there is the Accsoon And then right there, that’s the Hollyland so, one to two frames difference there. The Accsoon soon is five frames off

the Hollyland is about seven frames off. Add that to the four

frames of latency already and you have 11 frames or 176 milliseconds which is right about the limit of where people can notice the sync is off. Given this much latency in the system,

when filming a live event, I would run the main audio straight

into the ATEM or through a camera with a wired connection instead of

through the wireless video transmitters. 


Now, the range test. For this test, I had my buddy Jeff Corrigan from Turbo come by with his Accsoon two pro HDMI only version.  Hollyland claims that Cosmo can go up to 1000 feet while Axon claims a 1200 foot distance. We took turns walking a block away

line of sight. Take a look. Just got this here. Cosmo by HollyLand wireless transmitter. And we want to see just how far before

it breaks up before the signal breaks up. So we’re going to walk across

that vacant lot where the Salvation Army used to be Go directly diagonal and see what happens. Here we go. That signal is very crisp and clean zooming in Yeah, no problem. All right, so we’re going to put it up

against my $600. Or if you get them, like, renewed,

like I did get them for like $499. The Accsoon Cineeyes pro 2 wireless

now, it’s HDMI, so we had to do some gobbledygook

to convert to SDI. But that shouldn’t matter for this test. I’m going to do the same walk that Horacio just did. if any of this breaks down and it’s pretty good, we’re on the same spot and it looks like it’s crystal clear. No problem at all. So both models perform without any issues.

In my experience the video switcher is usually within 100

to 200 feet from the camera. So either system would be fantastic

for my workflow. 


For this next test, I wanted to see how far an iPad could be

from the Accsoon before losing signal I went out to Ocean Beach

with my fiancee, Angel, and our dog Onyx Hey, we’re here in Ocean Beach. We’re testing out the Accsoon Cineeyes 2s Pro. We’ve discretely hidden the G2 to inside the tent so it doesn’t get sandy. I’ll show you what that looks like we’ve got the Accsoon Cineeyes connected to that SDI port and we’re monitoring on the iPad. I don’t know if you can see that. I’m going to walk down the beach towards the restroom over there because A, I need to use the restroom and 2 I want to see how far we can go with this before we lose signal from the Cineeyes 2s Pro Okay, here we go. So I walked all the way from the tent to the restrooms. The tent’s way back there I would say about 500 feet at least, maybe more and still no drop outs I don’t know if you can see it but still no drop outs on the App. Very successful. OK, I’m going to go take a bio-break. I’ll be back. So the signal dropped out around 500 to 600 feet which I think is great for a Wi-Fi connection.


In a corporate video situation. I don’t think the client would ever

be more than 100 feet away. So, perfect. In conclusion, ultimately,

my buying decision came down to price, although I love the form factor

and the SDI loop out on the Cosmo, I don’t think it’s worth the extra cost. The Accsoon is just as reliable as the Cosmo, and I think the ability to use iPads as client

monitors will be much more useful for the type of corporate video shoots

that I do.   When B&H lowered the price of the 2

s pro last week to $515, I had a jump on it and purchased

2 Accsoons So that’s it. That’s my story. That’s my test. I’m not sponsored

by either of these companies, but there are some affiliate links

in the description below if you want to purchase any of these

products and help out and support  Cinema Viva at the same time. Based on my experience,

I went with the Accsoon and I think it will integrate perfectly into my workflow. However,

if it weren’t for the sale at B&H I was going to keep the Cosmo

and have 1 Accsoon and 1 Cosmo. The Cosmo is a reliable system, and maybe

that fits into your workflow better. You be the judge.

Thanks for watching this video. Please like and subscribe. if you gained some knowledge

and found some entertainment here. Stay tuned for more tech talks to come. This is Horacio of CinemaViva wishing you the best and much success.