


How to Fix Audio and 'Preparing Video' Issues When Playing Videos in Unity?
Jan 29, 2025 am 10:36 AMTroubleshooting Unity Video Playback: Audio and Preparation Issues
Unity's shift from MovieTexture to the VideoPlayer and VideoClip API (since version 5.6.0b1) brought enhanced cross-platform video support, but also introduced some common pitfalls. This guide addresses two frequent problems: audio playback failures (especially on Windows 10 Editor) and the "Preparing Video" hang.
Fixing Audio Playback Issues
To ensure audio plays correctly, implement these crucial lines before calling videoPlayer.Prepare();
:
// Route audio output to an AudioSource videoPlayer.audioOutputMode = VideoAudioOutputMode.AudioSource; // Enable and assign the audio track to the AudioSource videoPlayer.EnableAudioTrack(0, true); videoPlayer.SetTargetAudioSource(0, audioSource);
This directs the video's audio to your designated AudioSource for playback.
Resolving the "Preparing Video" Hang
The "Preparing Video" infinite loop is often resolved in one of two ways:
- Timeout Mechanism: Introduce a timeout to prevent indefinite waiting. Use a
WaitForSeconds
coroutine:
WaitForSeconds waitTime = new WaitForSeconds(5); while (!videoPlayer.isPrepared) { Debug.Log("Preparing Video"); yield return waitTime; break; // Exit loop after timeout }
playOnAwake
Setting: Alternatively, enableplayOnAwake
for bothvideoPlayer
andaudioSource
:
videoPlayer.playOnAwake = true; audioSource.playOnAwake = true;
This initiates playback automatically when the scene loads.
Additional Considerations
-
Video Sources: Use
videoPlayer.source = VideoSource.Url
for web-based videos, remembering platform-specific path prefixes when loading fromStreamingAssets
. - Supported Formats: Consult Unity's documentation for platform-specific compatible video formats.
Conclusion
By applying these solutions, Unity developers can seamlessly integrate video playback with reliable audio output, avoiding common hurdles associated with the VideoPlayer API.
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