Nulu Originals Criteria for 4K Movies and Graphic Assets
Resolution: The movie must have a minimum resolution of 3840 x 2160 pixels (4K UHD), maintaining consistent pixel count throughout the entire duration without downscaling or upsampling.
Aspect Ratio: The movie should support a standard aspect ratio of 16:9, accurately displaying the content without distortion or letterboxing.
Frame Rate: The movie should be encoded with a minimum frame rate of 24 frames per second (fps), ensuring smooth motion rendition. Higher frame rates (30fps, 60fps) are desirable for enhanced clarity, especially in fast-paced sequences.
Color Depth: The movie should be encoded in a minimum color depth of 10-bits per channel (30-bit color), delivering a broader range of colors and smoother gradients.
Bitrate: The video bitrate should be optimized to balance visual quality and file size. Recommended bitrates for 4K movies typically range from 15 to 25 Mbps, depending on the complexity.
Video Codec: Efficient video codecs like H.265 (HEVC) or AV1 should be utilized for compression, minimizing artifacts, banding, and visual distortions while ensuring wider device compatibility.
Audio: The movie should provide high-quality audio with a minimum of 5.1 surround sound. Higher configurations (7.1, Dolby Atmos) are preferred for an immersive audio experience.
File Format: The movie should be encoded in a widely supported container format (e.g., MP4, MKV) with appropriate encoding settings, adhering to industry standards (e.g., MPEG-4, H.264, or H.265).
Trailers: Trailers should be provided in high-definition (HD) or 4K resolution, utilizing appropriate codecs (e.g., H.264, H.265) for efficient compression. Audio should be encoded in a high-quality format (e.g., AAC, Dolby Digital) with optimal bitrates and channel configurations.
Posters and Key Art: Digital posters should have a resolution of 3000 x 4500 pixels or higher, using lossless or minimally compressed formats (e.g., PNG, TIFF) to preserve visual fidelity. Color spaces (e.g., sRGB) and ICC profiles should be properly embedded.
Digital Assets: All digital assets should maintain a minimum resolution of 1080p (1920 x 1080 pixels) for crisp display, utilizing appropriate compression settings for web or platform delivery while preserving image quality (e.g., JPEG with minimal compression artifacts).
Metadata and Descriptions: Metadata should follow industry standards (e.g., IPTC, EXIF) and be encoded using appropriate character encodings (e.g., UTF-8) to ensure accurate representation across platforms. Descriptions should be properly formatted and include relevant keywords.
File Formats: Graphic assets should be provided in widely accepted file formats (e.g., JPEG, PNG, TIFF) compatible with various software and platforms. Compressed assets should adhere to appropriate settings to maintain quality while minimizing file size.
Accessibility Considerations: Graphic assets should consider accessibility guidelines, including appropriate color contrast ratios, legible text sizes and fonts, and alternative text descriptions (alt text) for visually impaired users.
Visual Inspection: Movies, trailers, posters, and digital assets should undergo visual inspection for artifacts, compression artifacts, noise, banding, color accuracy, resolution issues, and overall visual quality. Calibrated displays should be used to accurately represent the intended resolution and color fidelity.
Audio Inspection: Audio tracks should be checked for clarity, proper channel assignment, accurate levels, appropriate mixing, and synchronized audio-video timing. Dialogues, music, and sound effects should be audible, well-balanced, and synchronized with the visuals.
Frame Accuracy: Movies should be reviewed for frame accuracy, ensuring there are no skips, stutters, or synchronization issues between audio and video components.
Aspect Ratio Verification: Movies and graphic assets should be inspected to ensure the correct aspect ratio is maintained consistently throughout, without unintended letterboxing, pillarboxing, stretching, or distortion.
Subtitle and Caption Accuracy: If applicable, subtitles and captions should be reviewed for proper formatting, timing, synchronization, and accuracy of content.
Metadata Accuracy: Metadata accompanying the assets, including titles, descriptions, credits, and keywords, should be checked for accuracy, completeness, and adherence to industry standards.
Color Accuracy and Consistency: Color spaces, ICC profiles, and color representation across different assets should be inspected to ensure accurate and consistent rendering across devices and platforms.
Text Legibility: Text elements in posters, trailers, and other assets should be examined for legibility, appropriate font usage, sizes, and contrast with the background.
Playback and Compatibility Testing
Playback Testing: Movies, trailers, and graphic assets should be tested on various playback devices, including 4K displays, media players, streaming platforms, and physical media players (if applicable). Playback should be assessed for smoothness, audio-video synchronization, and compatibility with different playback systems.
Platform Compatibility: Graphic assets should be tested on different platforms, such as websites, social media, and digital distribution platforms, to ensure they are correctly displayed and rendered without formatting or compatibility issues.
Aspect Ratio Handling: Movies and assets should be tested on different devices and displays to verify that the correct aspect ratio is maintained without unintended distortions or black bars.
Color Representation: Movies and assets should be tested on displays with different color profiles and configurations to ensure consistent and accurate color representation across a range of devices and platforms.
Accessibility Testing: Graphic assets should be tested with accessibility tools and assistive technologies to ensure compatibility and proper rendering of alt text, captions, and other accessibility features.