Understanding chapter point placement
When transcoded to MPEG-2, the video footage is divided into contiguous Groups of Pictures (GOPs), which are typically 13 frames long. Playback of any frames within the GOP must begin from the start of the GOP, or the GOP header. For this reason, when you insert a chapter point, Adobe Encore DVD places it at the closer prior GOP header. You can view the GOP headers in the Timeline window. When working with AVI files, these restrictions do not apply because the file has not been transcoded. When Adobe Encore DVD transcodes AVI files, it automatically creates GOP headers at every chapter point you set. After transcoding, the file is then considered an MPEG-2 file, and the rules for chapter point placement for MPEG-2 files now apply to that clip. Note: To ensure both DVD-compliance and best quality transcoding, place chapter points in AVI videos at least 15 frames apart.
To add a chapter point: - Open the timeline to which you want to add chapter points (or click its tab in the Timeline window if it is already open).
- Choose Window > Monitor to view the video as you add chapter points.
- Move the current-time indicator to the frame where you want a chapter point by doing one of the following actions:
- Click the tick mark in timeline ruler at the desired location.
- Drag the Timeline timecode until it reaches the desired frame.
- Click the Timeline timecode, and type the timecode of the desired frame.
- Click the Play button in the Monitor window, and then click the Pause button when the video reaches the desired frame.
- If you are working with MPEG-2 video, click either the Skip Forward button
or the Skip Backward button to move to the next GOP header. To view the GOP headers in the Timeline window, zoom in on the Timeline window ruler. The GOP headers are represented as white vertical lines along the bottom edge of the ruler. - Do one of the following actions to add a new chapter point:
- Choose Timeline > Add Chapter Point.
- Click the Add Chapter button
in the Monitor window or Timeline window. - Right-click the ruler in the Timeline window at the spot where you want to add a chapter point, and choose Add Chapter Point.
To name and describe a chapter point: - Do one of the following actions:
- Open the timeline (or click its tab in the Timeline window if it is already open). Adobe Encore DVD displays the timeline in the Timeline window.
- Click the Timeline tab in the Project window, and select the desired timeline. Adobe Encore DVD displays its chapter points at the bottom of the tab.
- Select the desired chapter point in either the Timeline window or the Timeline tab.
- Choose Window > Properties to open the Properties palette if it's not open. The Properties palette displays the chapter point's attributes.
- Select the current name, and type a new name to rename the chapter point.
- Click an insertion point in the Description box, and type a description of the chapter point.
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