Forum Discussion
Audio and Video out of sync when using Seekbar
I have a number of different courses where I have recorded video using Storyline. I have then exported the video, converted it to an audio file, edited the audio with Audacity, and then inserted th...
Hi all,
Thanks everyone for your patience.
We have been actively investigating this specific issue for some time now and are now able to share an update on our progress with you.
The sync issue stems from a limitation with the way Flash handles video. It is only possible to sync playback to the nearest video keyframe. Keyframes may occur multiple times per second, but in some videos it may be several seconds between keyframes. If the seek bar is moved to a position that does not correspond to a keyframe, the timeline will play from the precise position selected but video will only play back from the nearest keyframe, causing the sync issues described above.
The Storyline team is working on a fix which is currently slated to be included in the next update for Storyline 2. The fix works around the Flash limitation described above by limiting seeking during video playback in Flash to positions that line up with the video’s keyframes. We will share further information on timing for the update (which addresses several other customer-reported issues as well) on this thread once it has gone through our usual testing process.
In closing, I wanted to assure everyone that we closely monitor these discussions and take the issues you report incredibly seriously. The seven major updates we’ve shipped for Storyline 2 since its initial release have addressed a long list of customer-reported issues at no cost to our customers. You have our commitment that we will continue to actively evaluate and fix reported issues for the lifetime of the product.
Cool. I created a work around for this.
- Put a 50% transparent rectangle over the seekbar.
- Create separate start/stop controls that sit on top of the start/stop controls of the seekbar.
- Create triggers assigned to the "faux" stat/stop controls that would start and stop the timeline.
Benefits:
- Still get to see the seekbar advance and the time indicator
- Starting and stopping timeline doesn't throw any animated effects out of wack
Drawbacks:
- Not a true seekbar since you can't jump around in the movie.
Hope this helps.
- Michael
