How to watch video streaming

OpenMV Products
1

Hello,
I am trying to streaming video with the wifi shield and the “rtsp_video_server_1.py” program example.
The program apparently runs on the OpenMV. Its output is:

Running in Station mode…
IP Address: Port 192.168.0.139:554
Running…

But I can’t get to watch the video. I have tried with VLC and with Chrome browser on a PC in the same network.
What can be wrong?

NOTE: I have already updated the firmware using the “fw_update.py” example.
Thanks in advance.

2

Are you using the OpenMV Cam H7 Plus with an OV5640? And did you point the RTSP URL in VLC to rtsp://192.168.0.139:554 ?

It should just work.

3

Hello,
I got to watch the streaming using another wifi. With a low resolution (QVGA) the framerate is enough.
Now I have an issue:
I need to run a vision program and at the same time streaming what the camera is seeing.
The vision program requires the setting of pixformat as RGB565 and the streaming program as JPEG.
I don’t get to make any of them working with the other setting.
Is there a solution to this?
Thanks!

4

Just do .compress() on the image to send it.

5

Hello again,
What I need is to execute a vision program to measure an object and, at the same time, streaming the video.
Both functions work separately, but I cant get them to work simultaneously.
If I do somenthing like:

…
server.stream(image_callback)
…
while(True):
…
(vision program)
…

The loop does not execute.
I understand that the stream does not return, and blocks the program. The function is also blocking if inserted into the loop.
I considered creating a thread, but I understand that it is not possible in OpenCam.
What should I do?
Thanks in advance

6

Hi, you just want to do the processing in the image_callback. Assuming someone connects to the stream then you process data while they are connected. The second they disconnect you stop processing data.

Also, this just got added:

https://docs.openmv.io/library/uasyncio.html

You can modify the RSTP streaming code to use the uasyncio to run multiple co-routines at once.

7

Hello,
I put the vision code in the callback function as you told me and it works.
Now I have another issue to solve:
As I need to use RGB565 pixformat to do the vision algorithm, at the end I compress the image to send it by streaming, but the streaming is intermittent, not good.
If I , at the end of the callback function, switch to JPEG pixformat and take a snapshot to send the streaming, the streaming is good. But then I can’t draw on the image to show the result of the vision algorithm…
Is there any solution to this?
Thak you for your patience…

8

Yes, can you give me a month? I have two updates to the firmware that should fix your issue.

  1. We will be adding triple buffering to the firmware. This will double your FPS.

  2. I will be updating the JPEG code to include the missing JPEG JIFF header along with making jpeg compression faster.

These two fixes should make the whole streaming perfect.

9

Ok thanks!
I wait for your update.