Specifying compress and convert options

Use the Compress and Convert tab to compress media when publishing. Select the Audio to MP3, Video to MP4, or Images to JPG check boxes to compress the corresponding resource types within your title. Use the sliders to select from ten different levels of compression.

Selecting to compress your media objects will compress all audio, video, and image resources within your title. Alternatively, you can compress individual audio and video objects. See Converting to MP3 audio and Converting to MP4 video.

When you choose to compress audio and video, the program will automatically convert all of your title’s audio files to MP3 and all video files to MP4 (not including .flv files). These are highly-compressed file types that can be played with the Flash plug-in or using HTML5 and are therefore supported across computer, tablet, and smartphone browsers. If your audio or video files are already in a compressed format, such as Windows Media Audio (.wma) or Windows Media Video (.wmv), it is not recommended to further compress, as this will greatly diminish the quality of your audio or video. However, the media can not be accessible across both traditional and mobile platforms.

You should also take into consideration the type of audio and video you have added to your title. If the audio contains simple voice overs or small sound bytes, this kind of audio can be highly compressed without losing much quality. If the audio is music, high compression will result in a loss of quality of the music. Similarly, if the video contained within your title does not contain a lot of movement, it can be highly compressed without losing much quality. Alternatively, if your video contains a lot of movement, compression will result in a loss of quality of the video.

When you choose to compress images, image types other than .gif, .png or .jpg will be converted to .jpg files. The program will attempt to compress all images larger than 10k within your title. Compression will only occur if it results in the image size decreasing by more than 2k. Otherwise, the image will not be compressed.

When your compression settings are low, the quality of the audio, video and images will be maximized and file sizes will be larger.
When your compression settings are high, the quality of the audio, video and images will be minimized and the file sizes will be smaller.
On mobile devices, only .mp3 audio and .mp4 video file types are supported. Additionally, synchronized events are only supported with .mp3 audio and .mp4 video file types. Synchronized events are events configured to run at specific times while the media object is playing, like hiding or showing messages or moving a pointer on a diagram. For more information, see Adding and managing the synchronized events of an audio object and Adding and managing the synchronized events of a video object.