Marker types in Compressor
Compressor can create the following types of markers:
Marker type | Description |
|---|---|
Chapter markers | Generate named index points for for DVDs, QuickTime movies, or video podcasts, and thumbnail images for QuickTime movies. You can also assign a URL to a chapter marker to have that URL appear during playback of a podcast. Chapter markers are also included in submissions to the iTunes Store as part of an iTunes Store package. Chapter markers appear orange in the Compressor preview area. |
Compression markers | Generate an I-frame, but do not generate thumbnails, chapter-track entries, or other metadata. Add them to a video if a section appears to have lower image quality than the surrounding frames. Compression markers appear blue in the Compressor preview area. |
Edit markers | Function identically to compression markers and are commonly used by compression artists to force an I-frame at an edit point to ensure higher image quality at that moment in the video. Edit markers appear red in the Compressor preview area. |
Podcast markers | Like chapter markers, podcast markers can have artwork and a URL assigned to them. Podcast markers are usually used to provide a slideshow (with URLs) for users to view when playing audio podcasts. However, podcast marker names do not appear in the slideshow, and users can’t navigate to a podcast marker in the transcoded file. Podcast markers appear purple in the Compressor preview area. |
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