Loosing sound from video, when using GUILabel

Audio & Video
1

Hey just wondered if someon can help, Im playing videos in GUILabel using this code:

var m : MovieTexture;
public var VideoCall : String;
var Main_Camera : Camera;
var Map_Camera : Camera;
var Video_Camera : Camera; 


function OnGUI () {
GUI.Label (Rect (400,100,450,150),m);
		Main_Camera.enabled = false;
		Map_Camera.enabled = false;
		Video_Camera.enabled = true; 
		
		
		RequireComponent(AudioSource);
		audio.clip = m.audioClip;
		audio.maxVolume = 25;
		audio.minVolume = 20;
		audio.volume = 20;

		m.Play();
		
		
		Invoke("LoadNewLevel", audio.clip.length);
}

So the video plays for the length of the sound then the camera is changed.

The problem is im using the same code for 3 of my videos and on the 3rd video at completely different points the sound disapears.

and for a video i have which appears on a collision there is no sound at all.

Anyone have any ideas?

Any help would be brilliant.

i have a similar issue in the video previewer, if i loop the video after 2 loops the sound disapears.

2

just set the audio source to loop and it now works.

Having a very similar problem to some other video clips though, anyone else having issues with movie clips and sound?