If the video plays back on your computer without problems then your best option is to re-encode the video and choose different video and audio bit-rates. See the FAQ on how to stop movies jerking.

To compress audio you will need the QuickTime Pro Player from Apple Computer, or any other application which supports QuickTime export in order to encode audio. If you are using QuickTime Pro please follow the instructions found below. If you are using another application please follow the instructions that accompany the software.

This is usually to do with the speed of the system used for encoding. Older and those machines with low RAM will have trouble encoding video and will often produce video that falls out of sync. The power of the playback machine is also a factor. The larger the viewable video area, the more resources required for seemless playback. You will need to weigh up the average system of your users with the size of the video that you provide, or look to offer multiple sizes.

There have been numerous reports of "lip sync" problems, where the audio lags slightly behind the video, and even reports of the audio coming before the video. Perception of a sync problem is highly subjective--some people are bothered by it while others can't discern it at all.

This appears every now and then due to regionfree mode or at playback of an NTSC movie on a PAL TV-set or viceversa. Change region and/or TV-format.

The synchronization result of video and audio is highly depend on the computer performance. Please quit all other programs including any background jobs during conversion. Sometimes, the streaming audio in flash movie will cause the out of sync problem. To get the best result, we suggest to change the streaming sound to event sound, and disable the "Audio Streaming" setting in the Publish Setting Dialog Box when you export flash to swf.

Your system needs the most recent drivers and software. Download and install the latest version from the updates page then run the hardware tune-up utility. If the source is a NTSC source , "Drop frame mode" must be checked in the "Advanced MPEG Properties" page to avoid a lip sync loss.

No, you can't. As the audio and video is converted within 2 different phases, it is impossible to sync audio and video because the interaction between these 2 phases cannot sync to each other. However, we'll try to solve this problem in future release.

It is quite possible your phone requires different settings with what we offered or you set. Please get to know more about what proper settings for frame rate, as well as some others your phone can support. If the Advance button is disabled, after you click Audio tab and please click Volume button in Sound Recording panel and then you will see a pop-up window, and choose Properties in Options menu and then please check Stereo Mix in the list.

A Your computer system is configured to try to play QuickTime files in Windows Media Player instead of in QuickTime. Windows Media Player will be unable to play QuickTime movies found on the IJustWantToSleep® Web site. Reinstall QuickTime; we recommend downloading a fresh copy of the current version using the links above.

This issue is often caused by the DirectShow Subtitle Filter (subtitds.ax) that is installed by a non-Microsoft program. The video transitions and effects already in Movie Maker are based on DirectShow. However, Movie Maker will quit unexpectedly if more than 100 DirectShow video transitions or video effects are installed on your computer. If video programs that contain additional DirectShow video transitions and video effects are installed on your computer, this may exceed the allowable amount.

If you cannot hear audio, go to "Options" menu -> "DVD Settings", choose a proper DVD Audio Decoder, such as AC3Filter (Download). Remember, you need to find out a working audio decoder in the program's DVD Setting.

For best image quality: please try Photo JPEG or Motion JPEG formats with 100% quality, 30 FPS, at 320 by 240 pixels. For best performance: Please try VIDEO codec with key frame every 1 second, 100% quality at 320 by 240 pixels. If running only one video channel, you can try rendering video size at 640 by 480 pixels, or try Quicktime DV/DV CAM format. If there is an audio track, you may render it uncompressed at 44 khz, 16 bit stereo.

Try downloading the movie to your computer and watching it locally. Sometimes choppiness occurs when we can't stream it to you quickly enough (because your connection is slow or our servers are overloaded). If you're watching an MPEG-4 that we derived from an original MPEG-2, we first reduce its size to 320 x 240 - a quarter of the resolution of NTSC video. We then translate it at 350 kbps, which is really borderline for that resolution.

Flash SWF video has two framerates: a) a video framerate, which is the number of distinct video frames per second in your video, and b) a SWF framerate, which is the number of SWF frames in your final Flash video. These are not the same thing and you have to keep track of both - and how they relate to each other and to the source video framerate. Flash video is different in this way then standard video which has only a single video framerate. (Note: This does not apply to FLV video.