清空筛选条件
清空筛选条件

Greetings. Does anyone knows how to solve this issue?

2 次查看（过去 30 天）
Yusuf Ikmal
Yusuf Ikmal 2023-4-1
移动：Walter Roberson 2023-5-7
  5 个评论
显示 3更早的评论
Yusuf Ikmal
Yusuf Ikmal 2023-4-3
Sure. Here is the model. You can try run the model using the given video. Thank you and I hope I can get the solution.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Amey Waghmare
Amey Waghmare 2023-4-21
Hi,
As per my understanding, you are encountering an error in the ‘Selector’ block while running the model.
The error is because the input to this block is of size 0. Upon further investigation, I found out that this is because the ‘Pts’ output of ‘Hough Lines’ block in ‘Warning Signal Module’ is empty. This is because the first frame of the video ‘freeway-8356.mp4’ is a complete black image which results in empty ‘Theta’ and ‘Rho’ for this frame and causes the error.
In order to resolve the error, please specify the video file in ‘From Multimedia File’ block without any full black frame. For the ‘freeway-8356.mp4’ video you can remove the first frame in MATLAB using the following code,
clear;
clc;
vid = VideoReader('freeway-8356.mp4');
newVid = VideoWriter('freewayNew.mp4', 'MPEG-4');
open(newVid)
for frameNums = 1:300
I = readFrame(vid);
if frameNums > 1
writeVideo(newVid, I)
end
end
close(newVid)
This will create a new video file ‘freewayNew.mp4’ containing only the frames from 2 to 300 of ‘freeway-8356.mp4’
I hope this helps.
  1 个评论
Yusuf Ikmal
Yusuf Ikmal 2023-5-2
Helo, thanks for the reply. I tried to do as you suggest and it works! Thank you very much. And another question, do I need to do the same method if I try to use different video file?

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Computer Vision with Simulink 的更多信息

标签

产品


版本

R2022b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by