To ensure high quality and usability, Cathopic has specific technical requirements for all uploaded content. Here are the detailed specifications.
Photo requirements
File formats accepted:
JPG/JPEG only
RGB color space
sRGB color profile recommended
File size:
Minimum: 4 MB (verified by system)
Recommended: 10-30 MB for optimal quality
No explicit maximum (server limits apply)
Resolution:
Recommended (not enforced): 3000+ pixels on shortest side
4000+ pixels ideal for large print use
High resolution suitable for print use
Recommended (not enforced): 300 DPI for print quality
Quality standards:
Sharp focus on main subject
Proper exposure without blown highlights or blocked shadows
Accurate white balance and color
Minimal noise unless artistic intent
No visible compression artifacts
Professional composition
Video requirements
File formats accepted:
MP4 (H.264 codec)
MOV (QuickTime)
File size:
Minimum: 15 MB (verified by system)
Maximum: 2 GB
Recommended: Optimize for quality while staying under 500 MB
Resolution and quality:
Minimum: HD 1920x1080 (1080p)
Recommended: 4K 3840x2160
Fake 4K accepted (upscaled HD)
Maintain aspect ratio (16:9 standard)
Duration:
Recommended: 10-20 seconds
Minimum: 5 seconds
Maximum: 60 seconds
Loopable clips preferred
Technical standards:
Stable footage (use tripod or stabilization)
Smooth motion
Proper exposure throughout
Clean audio or no audio
No visible artifacts or glitches
Consistent color grading
Graphics and illustrations requirements
File formats accepted:
AI (Adobe Illustrator)
EPS (Encapsulated PostScript)
PSD (Adobe Photoshop)
SVG (Scalable Vector Graphics)
PDF (for vector graphics)
FIG (Figma)
SKETCH (Sketch)
File size:
Minimum: 4 MB (verified by system)
Maximum: 2 GB
Keep files optimized but high quality
Quality standards:
Vector format preferred for scalability
Layered source files (PSD, AI) required
High-resolution raster elements (300+ DPI)
Clean paths and anchor points
Organized layers and groups
Editable text when applicable
Design specifications:
Professional, polished appearance
Appropriate resolution for intended use
Consistent styling and typography
Catholic-appropriate design aesthetic
Clear subject and purpose
Common technical issues to avoid
Photos:
Soft focus or blur
Excessive noise/grain
Poor exposure
Low resolution
Compression artifacts
Incorrect color space (CMYK)
Videos:
Camera shake
Inconsistent exposure
Audio issues
Low resolution
Encoding artifacts
Incorrect aspect ratio
Graphics:
Low-resolution raster elements
Unorganized layers
Flattened files without editability
Pixelation when scaled
Poor typography
Missing fonts or links
Metadata embedded in files
If your files contain IPTC/XMP metadata, Cathopic will attempt to read:
Title
Description
Keywords
Location information
Copyright information
This metadata can pre-fill upload fields, saving you time.
Preparing files for upload
Best practices:
Export at highest quality settings
Use appropriate color profiles (sRGB for web)
Optimize file size without sacrificing quality
Embed copyright information
Add IPTC keywords if possible
Test files before uploading
Quality over quantity
Remember:
Meeting minimum specs doesn't guarantee acceptance
Content must also be well-composed and Catholic-relevant
Higher technical quality = better chance of approval
Users prefer premium quality content
For complete technical guidelines, see our upload requirements guide.
