# VOXL streaming has at least 2-3s delay for default 640x480 using hires

Source: https://forum.modalai.com/topic/906/voxl-streaming-has-at-least-2-3s-delay-for-default-640x480-using-hires
Category: Development Drones (https://forum.modalai.com/category/44/development-drones)
Tags: m500
Posted: 2022-05-02 15:28:04 UTC by yu zhang
Replies: 4 · Views: 1115

## yu zhang · 2022-05-02 15:28:04 UTC

Hi team, 
The voxl-streaming via wifi connection has a noticeable video delay (2-3s), and I am using the default hires setup with just 640x480. 

I am wondering how to speed up the voxl-streaming for a real-time video transmission like an FPV mode?  

Is it due to a wifi connection? Or if changing to an LTE connection, voxl-streaming could easily speed up to achieve a real-time performance?

## Reply by Guest · 2022-05-02 16:31:50 UTC

What are you using to view the stream? We generally find that if you're streaming via voxl-portal or ros the stream will be almost real-time, but if you're using vlc there will be a significant delay

## Reply by yu zhang · 2022-05-03 00:23:23 UTC (in reply to Guest)

Hi @Alex-Gardner Yes, I am using vlc and the delay is quite strong. 

voxl-portal is a good option and I will have a look at it. 

I am also wondering how to use ros to view the stream? Can you please introduce a bit about it? Thanks.

## Reply by 張為超 · 2022-05-03 08:15:36 UTC

Hi @yu-zhang i might have the answer about use ros to view stream here.
On voxl 
```
yocto:~$ roslaunch voxl_mpa_to_ros voxl_mpa_to_ros.launch
```
On pc  
```
rqt_image_view 
```
Then select the  img topic you interested.
And remember to make sure that the ip config on both side is correct.voxl's ros ip is in *my_ros_env.sh* and for pc edit in *.bashrc*. 
detail in https://docs.modalai.com/setup-ros-on-voxl/
Hope that will help you :)

## Reply by yu zhang · 2022-05-04 01:51:20 UTC (in reply to 張為超)

Hi @張為超 All right, thanks so much for that, and I will then have a look at it ;)