Scroll through video array randomly

HI I am trying to randomly cycle through an array of videos. I just want the the videos to play from start and randomly go through the video array one after another forever. I have tried to adopt the code from an audio tutorial but am having no luck with it working for video. I am rather new to this (sorry if the code is way off). Please help. Thanks!

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Video;
5.  
6. public class RANDOM2 : MonoBehaviour
7. {
8.     private int videoClipIndex;
9.     public VideoClip[] VideoClipArray;
10.     private VideoPlayer videoPlayer;
11.  
12.  
13.     void Awake()
14.     {
15.         videoPlayer = GetComponent<VideoPlayer>();
16.         videoPlayer.Pause();
17.     }
18.     void Start()
19.     {
20.         videoPlayer.targetTexture.Release();
21.         videoPlayer.clip = VideoClipArray[Random.Range(0, VideoClipArray.Length)];
22.         videoPlayer.Play();
23.         SetNextClip();
24.     }
25.  
26.    
27.     void Update()
28.     {
29.      
30.     }
31.      public void SetNextClip()
32.     {
33.     videoClipIndex++;
34.  
35.  
36.     if (videoClipIndex >= VideoClipArray.Length)
37.     {
38.      videoClipIndex = videoClipIndex % VideoClipArray.Length;
39.      }
40.  
41.      videoPlayer.clip = VideoClipArray[videoClipIndex];
42.  
43.      videoPlayer.Play();
44.  
45.      }
46. }
47.  

 

All of the code in your Start method, minus the SetNextClip method call, should do exactly what you want.
The SetNextClip method and videoClipIndex variable are not needed. All you really have to do is take the code from the Start method and place it in a new method that can be called when the current video ends, which you can determine by getting the length of the video clip and using Time.time to set how much time should pass before the next video plays.

Something like:

Code (CSharp):

1.  
2. public class RANDOM2 : MonoBehavior {
3.  
4.    public VideoClip[] VideoClipArray;
5.    private VideoPlayer videoPlayer;
6.    private float timeUntilNextVideo;
7.  
8.    void Awake() {
9.       videoPlayer = GetComponent<VideoPlayer>();
10.       videoPlayer.Pause();
11.    }
12.  
13.    void Start() {
14.       timeUntilNextVideo = 0f;
15.    }
16.  
17.    void Update() {
18.       if(Time.time > timeUntilNextVideo) {
19.          PlayRandomVideo();
20.       }
21.    }
22.  
23.    void PlayRandomVideo() {
24.       videoPlayer.targetTexture.Release();
25.       videoPlayer.clip = VideoClipArray[Random.Range(0, VideoClipArray.Length)];
26.  
27.       timeUntilNextVideo = Time.time + videoPlayer.clip.length;
28.  
29.       videoPlayer.Play();
30.    }
31. }
32.  

I'm not currently able to test if this will work, but the general idea is that you will add the length (in seconds) of the video clip to the total time (in seconds) that has passed since the application started running. Once the amount of time the application has been running catches up to this value, it will call the PlayRandomVideo method again and loop the processes endlessly.

 

Thank you for your answer. However, the line:

timeUntilNextVideo = Time.time + videoPlayer.clip.length;

Comes up with an error? Do you know what might be the problem?

Cheers!

 

What's the error message?

 

It says:

Cannot implicitly convert type 'double' to 'float '. An explicit conversation exists (are you missing a cast)

Thanks.

 

Ah, I didn't realize that the video clip length returned a double instead of a float.
Simply add "(float)" before videoPlayer.clip.length;

If you're interested in why this fixes the error, view the spoiler below.

Spoiler: Explanation

Time.time is a float and the length of a video clip is a double.
Doubles and floats are both numbers that are accurate up to a certain number of decimal places, floats being a smaller number of decimal places, and doubles being a larger number of decimal places.
Since we're trying to add a number with a lot of decimal places to a number that doesn't have that many decimal places, an error occurs.

You can fix this with a cast (which is what the error is referring to).
Casting is when you convert one data type into another, and it will work as long as the data between the two values are the same. (IE, you cannot convert letters into numbers).
You can convert a double into a float just by adding "(float)" before the value, and this will chop off the decimal places of the double that go over the max number of places for a float, like so:

Code (CSharp):

1. timeUntilNextVideo = Time.time + (float)videoPlayer.clip.length;

Casting can be done with other data types as well. Say if you have a float value like this:

Code (CSharp):

1. float percent = 36.19362;

And you only want the whole number, excluding the decimal places. You can cast this value as an integer:

Code (CSharp):

1.  
2. float percent = 36.19362;
3. int wholePercent = (int)percent;
4.  

And the value of "wholePercent" will be 36.

I recommend going through Unity's tutorials about C# and its API here so you can better understand how to write your own scripts, because there's only so much you can do without scripting.

 

Thank you. Yes I need to dig more into it. The code has no errors but there is an error within Unity when I try to run?
The error in Unity is:

NullReferenceException: Object reference not set to an instance of an object
RANDOM2.PlayRandomVideo () (at Assets/RANDOM2.cs:39)
RANDOM2.Update () (at Assets/RANDOM2.cs:33)

I have googled and tried to figure out with no luck... I will keep trying but if you have any ideas would appreciate.
Thanks!

 

Ahh figured it out. Here is the final code if anyone is interested. Thanks for your help!

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Video;
5.  
6. public class RANDOM2 : MonoBehaviour
7. {
8.  
9.     public VideoClip[] VideoClipArray;
10.     private VideoPlayer videoPlayer;
11.     private float timeUntilNextVideo;
12.  
13.     void Awake()
14.     {
15.         videoPlayer = GetComponent<VideoPlayer>();
16.         videoPlayer.Pause();
17.     }
18.     void Start()
19.     {
20.       timeUntilNextVideo = 0f;
21.  
22.    
23.     }
24.  
25.  
26.     void Update()
27.     {
28.    if (Time.time > timeUntilNextVideo)
29.        {
30.            
31.              videoPlayer.clip = VideoClipArray[Random.Range(0, VideoClipArray.Length)];
32.  
33.  
34.             timeUntilNextVideo = Time.time + (float)videoPlayer.clip.length;
35.  
36.              videoPlayer.Play();
37.         }
38.     }
39.  
40. }
41.  
42.  

 

Hi sorry but does the videos transition without a break? Mine don't do you know how to fix that?

 

you need to make two videoPlayers and alternate between the two of them and change the script to this:

• Code (CSharp):

  1. public class VideoRandomizer : MonoBehaviour
  2. {
  3.     public VideoClip[] VideoClipArray;
  4.     public VideoPlayer videoPlayer;
  5.     public VideoPlayer videoPlayer2;
  6.  
  7.     private float timeUntilNextVideo;
  8.     public bool assignedPlayer;
  9.     void Awake()
  10.     {
  11.       //  videoPlayer = GetComponent<VideoPlayer>();
  12.         videoPlayer.Pause();
  13.         videoPlayer2.Pause();
  14.  
  15.     }
  16.     void Start()
  17.     {
  18.       timeUntilNextVideo = 0f;
  19.  
  20.     }
  21.     void Update()
  22.     {
  23.    if (Time.time > timeUntilNextVideo)
  24.        {
  25.            if(assignedPlayer==false){
  26.              videoPlayer.clip = VideoClipArray[Random.Range(0, VideoClipArray.Length)]; }
  27.            else if(assignedPlayer==true){
  28.              videoPlayer2.clip = VideoClipArray[Random.Range(0, VideoClipArray.Length)]; }
  29.             timeUntilNextVideo = Time.time + (float)videoPlayer.clip.length-0.1f;
  30. if(assignedPlayer==false){
  31.              videoPlayer.Play();
  32.                 assignedPlayer=true;
  33.         }
  34. else  if(assignedPlayer==true){
  35.              videoPlayer2.Play();
  36.                 assignedPlayer=false;
  37.         }
  38.  
  39. }
  40.     }
  41. }
  42.  

 

Hi richardzzzarnold,
Beautiful code. I'm new to unity and am trying to do exactly what you describe in the above code. Might you please tell me how I can make this work with a few clips? Where do I place the clips and how do I make the code start running? To what do I attach the code? It might be simpler if you could send me a stripped-down project with just a few clips in it to get me started. Thanks,

 

using UnityEngine;
using UnityEngine.Video;

public class VideoController : MonoBehaviour
{
public VideoClip[] videos;
public VideoPlayer videoPlayer;
private int currentVideoIndex = 0;

Vector2 startTouchPos;
Vector2 endTouchPos;

void Start()
{
if (videos.Length > 0)
{
PlayVideo(videos[currentVideoIndex]);
}
else
{
Debug.LogError("No videos assigned to the array!");
}
}

void Update()
{
if (Input.touchCount > 0)
{
Touch touch = Input.GetTouch(0);

switch (touch.phase)
{
case TouchPhase.Began:
startTouchPos = touch.position;
break;

case TouchPhase.Ended:
endTouchPos = touch.position;

float swipeDeltaX = endTouchPos.x - startTouchPos.x;
float swipeDeltaY = endTouchPos.y - startTouchPos.y;

// Check for vertical swipe
if (Mathf.Abs(swipeDeltaY) > Mathf.Abs(swipeDeltaX))
{
// Swipe up
if (swipeDeltaY > 0)
{
SwitchToNextVideo();
}
// Swipe down
else if (swipeDeltaY < 0)
{
SwitchToPreviousVideo();
}
}
break;
}
}
}

void PlayVideo(VideoClip videoClip)
{
videoPlayer.clip = videoClip;
videoPlayer.Play();
}

public void SwitchToNextVideo()
{
currentVideoIndex = (currentVideoIndex + 1) % videos.Length;
PlayVideo(videos[currentVideoIndex]);
}

public void SwitchToPreviousVideo()
{
currentVideoIndex = (currentVideoIndex - 1 + videos.Length) % videos.Length;
PlayVideo(videos[currentVideoIndex]);
}
}


I created this code that plays my all videos from an array you can change the videos by swipe up and down

I was looking for creating a scroll through which I can scroll my videos up and down just like Youtube shorts and Tiktok

if anyone knows let me know.
Thanks.