UI Slider Audio lenght

Question

Hello, I am making an app for android, and I'm trying to set the value of the slider according to the time of the audio clip. I can move the slider, which forwards or rewinds to moments of the audio clip, but i can not make it move on it's own without any bugs. When i press play, the audio starts, it moves the slider, but it stutters, like i can hear it 2-3 times at once. I think it's because the slider.value is set to be modified in an update function. IDK guys, any help is greatly appriciated. Here's the code:

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 public class AudioSlider : MonoBehaviour {
     
     public Slider audioSlider;
 
 
     
     void Start () {
 
         audio.Play();
 
         audioSlider.direction = Slider.Direction.LeftToRight;
         audioSlider.minValue = 0;
         audioSlider.maxValue = audio.clip.length;
 
     }
     
     
     void Update () {
 
         audioSlider.value = audio.time;    
       
     }
 }

P.S Nothing changes when "Play on awake" on the audiosource is checked/unchecked.

Answer 1

Hello,

So I actually use this solution :

 public Slider TimeLine;
 // Flag to know if we are draging the Timeline handle
 private bool TimeLineOnDrag = false;
 
 void Update(){
 
     if (TimeLineOnDrag) {
 
         audio.timeSamples = (int)(audio.clip.samples * TimeLine.value);
 
     }
 
 
     } else {
             TimeLine.value = (float)audio.timeSamples / (float)clip audio.clip.samples;
 
     }
 
 }
 
 
 
 // Called by the event trigger when the drag begin
 public void TimeLineOnBeginDrag(){
 
     TimeLineOnDrag = true;
 
     audio.Pause();
 
     
 }
 
 
 // Called at the end of the drag of the TimeLine
 public void TimeLineOnEndDrag(){
 
     audio.Play();
 
     TimeLineOnDrag = false;
 }

I pause the audio while I move the handle that's better for the user's ears. Put the script where you have your AudioSource, reference the slider and link the last 2 function to the event trigger (for example OnMouseDown and OnMouseUp).

Answer 2

Answer by M_Kumar · Jan 19 at 07:50 AM

 IEnumerator Start()
 {
     slider.maxValue = audioSource.clip.length;
     slider.value = audioSource.time;
     while (audioSource.isPlaying)
     {
         slider.value = audioSource.time;
         UnityEngine.Debug.LogError("VALUE IS "+(audioSource.clip.length/audioSource.time));
         yield return null;
     }
     yield return null;
 }

You can then attach this function ( OnSliderValueChanged) to the Slider OnValueChanged event.

 public void OnSliderValueChanged ()
 {
     audioSource.time = slider.value;
 }

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Answer 3

Answer by Dalerjonjon · Sep 14, 2020 at 05:18 PM

alt text

it showing error

ui-slider-audio-lenght-unity-answers-opera-2020-09.png (10.9 kB)

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UI Slider Audio lenght

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