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Video Playback on Texture - Black screen appears at beginning for a moment

By fzaiatz on Wed, 03/26/2014 - 07:31

Issue explanation: a blank screen appears for a few moments (it's usually less than half a second), after the target was detected

When?: right after a target is detected, and the video is right about to start (PLAYING state)

Known issues: there seems to be a similar issue in Unity (check https://developer.vuforia.com/forum/unity-3-extension-technical-discussion/video-playback-black-screen-appears-moment).

How to solve? Well, the solution is based on NalinS' idea: try to delay a few frames the render of the contents

Just go to VideoPlaybackRenderer.java, inside renderFrame method, and replace this:

if ((currentStatus[currentTarget] == VideoPlayerHelper.MEDIA_STATE.READY)               || (currentStatus[currentTarget] == VideoPlayerHelper.MEDIA_STATE.REACHED_END)               || (currentStatus[currentTarget] == VideoPlayerHelper.MEDIA_STATE.NOT_READY)               || (currentStatus[currentTarget] == VideoPlayerHelper.MEDIA_STATE.ERROR)){    .....} else {    .....} with this: if ((currentStatus[currentTarget] == VideoPlayerHelper.MEDIA_STATE.READY)               || (currentStatus[currentTarget] == VideoPlayerHelper.MEDIA_STATE.REACHED_END)               || (currentStatus[currentTarget] == VideoPlayerHelper.MEDIA_STATE.NOT_READY)               || (currentStatus[currentTarget] == VideoPlayerHelper.MEDIA_STATE.ERROR)){    .....} else {    mFramesPlayed++;    if (mFramesPlayed < MAX_FRAMES_TO_JUMP) return;    .....} You will also have to add a new class member:private int mFramesPlayed = 0; And a constant to define how many frames you'd like to eat from the beginning of the video:private static final int MAX_FRAMES_TO_JUMP = 10;  Hope this helps someone!