Continue reading »]]> With the Apple ProRes format, you can work in a wide variety of frame sizes, frame rates, bit depths, and even color sample ratios.

Frame Dimensions Supported in Final Cut Pro with Real-Time Playback

Although the Apple ProRes format itself supports virtually any frame size, the Final Cut Pro RT Extreme real‑time effects architecture supports the following Apple ProRes frame sizes only:

– 720 x 480

– 720 x 486

– 720 x 576

– 960 x 720

– 1280 x 720

– 1280 x 1080

– 1440 x 1080

– 1920 x 1080

– 1024 x 512

– 1024 x 576

– 2048 x 1024

– 2048 x 1080 (Apple ProRes 4444 only)

– 2048 x 1152

– 2048 x 1556 (Apple ProRes 4444 only)

Scanning Method

The Apple ProRes format supports both interlaced and progressive scan images and preserves the scanning method used in the source material.

Color Recording Method

The Apple ProRes format supports the following digital video signals:

RGB

4:2:2 Y’CBCR

4:4:4 Y’CBCR

Data Rates

The actual data rate of Apple ProRes codecs depends on the dimensions, frame rate, image complexity, and quality setting you are using.

The Apple ProRes format has a target data size for every frame, regardless of complexity, but allows frames to fall short of that target if they are simple (if they cannot benefit in quality from using more bits). Such a shortfall is not reclaimed for other frames; instead, it just produces a smaller overall file.

The following table shows several sample data rates. The Apple ProRes codecs are designed to target the data rates shown. Because most sequences contain simple frames, actual bit rates are typically 5 to 10 percent lower than these targets.