Good morning! I am building a course in Presenter and have embedded a video in MP4 format. The video is not synching properly. I did research this issue in the forum and one member said that the audio bitrate needed to be changed to 160 kbps. I checked and the audio is at the correct bitrate. Any guidance would be most appreciated!
The audio is playing, but the video is very slow and choppy and doesn't match the audio. The video was shot with the audio in it, there is no separate voiceover.
How are you viewing the published project? Are you viewing it locally or after it's been uploaded to a web server, or LMS, or published for CD? If you view a published presentation on your local hard drive or send it to someone else to view on their local hard drive, you'll encounter security restrictions from the computer, web browser, Flash Player, and network that'll cause various features of your content to fail.
There are a lot of variables aside from bitrate that can affect how well videos perform, and without being able to see your video file, I'll give you some generic suggestions based on my experience.
First, I'm assuming that you've checked the video in Windows Media Player, and that it plays without choppiness or audio sync issues (if you do play it in Media Player, and have issues, that would point to the video file, and not Articulate Presenter).
Next, how large is the video file? A rule of thumb I use is that the video file should be no more than 10 MB per minute (for example, a 5 minute vide should be no more than 50 MB).
What are the dimensions of the video? Have you rendered it for full screen, half screen, or quarter screen? The larger the dimensions, the more data needs to be processed to maintain video quality.
What does the video look like -- is it high-motion? The more motion in a video, especially when the camera creates motion rather than capturing it, makes a difference in the amount of data that needs to be processed (this is the difference between a hand-held camera and one on a tripod).
What's the frame rate? Video is usually rendered at 30 frames per second, but if you have editing software, you could try rendering at 15 frames per second. You'll likely not see a difference in the quality of the video because of the frame rate, but you may see an improvement because less data is being processed.
Another thing you could try is to render the video in something besides MP4, like SWF or FLV to see if that makes a difference.
And finally (and I have no idea why this is), I've found that videos displayed in Engage (Media Tour, for example) perform better than when embedded in Presenter. If your project permits, you could give this a try.
4 Replies
Hello Katin -- could you explain a bit more? To what is the video not synchronizing? Is it separate voiceover, or something else?
Thanks!
The audio is playing, but the video is very slow and choppy and doesn't match the audio. The video was shot with the audio in it, there is no separate voiceover.
Hi Katin and welcome to E-Learning Heroes!
How are you viewing the published project? Are you viewing it locally or after it's been uploaded to a web server, or LMS, or published for CD? If you view a published presentation on your local hard drive or send it to someone else to view on their local hard drive, you'll encounter security restrictions from the computer, web browser, Flash Player, and network that'll cause various features of your content to fail.
What version of Presenter are you utilizing?
Hello again, Katin.
There are a lot of variables aside from bitrate that can affect how well videos perform, and without being able to see your video file, I'll give you some generic suggestions based on my experience.
First, I'm assuming that you've checked the video in Windows Media Player, and that it plays without choppiness or audio sync issues (if you do play it in Media Player, and have issues, that would point to the video file, and not Articulate Presenter).
Next, how large is the video file? A rule of thumb I use is that the video file should be no more than 10 MB per minute (for example, a 5 minute vide should be no more than 50 MB).
What are the dimensions of the video? Have you rendered it for full screen, half screen, or quarter screen? The larger the dimensions, the more data needs to be processed to maintain video quality.
What does the video look like -- is it high-motion? The more motion in a video, especially when the camera creates motion rather than capturing it, makes a difference in the amount of data that needs to be processed (this is the difference between a hand-held camera and one on a tripod).
What's the frame rate? Video is usually rendered at 30 frames per second, but if you have editing software, you could try rendering at 15 frames per second. You'll likely not see a difference in the quality of the video because of the frame rate, but you may see an improvement because less data is being processed.
Another thing you could try is to render the video in something besides MP4, like SWF or FLV to see if that makes a difference.
And finally (and I have no idea why this is), I've found that videos displayed in Engage (Media Tour, for example) perform better than when embedded in Presenter. If your project permits, you could give this a try.
I hope this helps!
Best Regards,
Dave
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