Using 24 fps Video

Often the video content for a DVD project originates from film shot at 24 frames per second (for NTSC this is actually 23.976 fps, which is more commonly referred to as 23.98 fps). The DVD specification allows you to include 24 fps MPEG-2 assets as long as they are properly flagged so the DVD player can decode them by either using a 3:2 pulldown (for NTSC DVD players) or playing them 4% faster (for PAL DVD players). The video resolution also must match those allowed for the intended video standard. See Choosing a Video Resolution for details on supported video resolutions.

This means that there are NTSC and PAL versions of 24 fps MPEG-2 assets, and you can only use NTSC 24 fps assets in NTSC projects and PAL 24 fps assets in PAL projects.

Encoding video that originates with a 24 fps rate as a 24 fps MPEG asset has two primary advantages:

These advantages are due to fewer frames being encoded, especially when compared to NTSC frame rates.

Important: MPEG-2 assets that include 23.98 frames to play at 29.97 fps show as 29.97 fps assets in QuickTime, Compressor, and DVD Studio Pro.

Importing 24 fps Assets

How DVD Studio Pro handles your 24 fps assets depends on whether or not they are already MPEG-2 encoded:

  • If you import 24 fps MPEG-2 assets: They are handled correctly and remain 24 fps when you build the project.

    Note: 24 fps assets show as their display rate setting when viewed in the Track Editor. This makes them appear as if they were at the NTSC or PAL frame rate. You can confirm they are actually 24 fps by selecting them in the Assets tab and verifying the frame rate in the Asset Inspector.

  • If you import 24 fps QuickTime assets: They are encoded as either 29.97 fps or 25 fps MPEG-2 files, based on your project’s video standard, and are no longer 24 fps when you build the project.

To create a 24 fps MPEG-2 asset, you need to use Compressor (included with DVD Studio Pro) or a third-party encoder that supports encoding 24 fps MPEG-2 assets.

Using 24 fps Video in Tracks

You can use 24 fps video assets in tracks just like you would use regular 29.97 fps or 25 fps video assets, as long as they match the project’s video standard (NTSC or PAL). You can also combine 24 fps assets with regular video assets within a track, as long as they use the same resolution.

Using 24 fps Video in Menus

You can use 24 fps assets in menus as backgrounds or assets for buttons and drop zones. You can also combine 24 fps assets with regular video assets within a menu.

If the menu must be rendered because it contains shapes, drop zones, or text objects, it is rendered at the project’s frame rate, even if the menu’s background is 24 fps.