Bluesky Video Formats Explained: Complete Guide to Supported Formats

Everything you need to know about video formats supported by Bluesky, including technical specifications, limitations, and best practices for content creators.

📋 Quick Overview

Bluesky supports 4 main video formats: MP4, MPEG, WebM, and MOV. Each video can be up to 50MB and 60 seconds long, with a daily limit of 25 videos or 10GB total.

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Supported Video Formats on Bluesky

MP4 MP4 Format Recommended

Full name: MPEG-4 Part 14

Extension: .mp4, .m4v

Best for: General use, maximum compatibility

Compression: Excellent (H.264/H.265)

Quality: High quality with small file sizes

Device support: Universal - works everywhere

MPG MPEG Format

Full name: Moving Picture Experts Group

Extension: .mpg, .mpeg

Best for: Legacy compatibility

Compression: Good (older standards)

Quality: Good but larger file sizes

Device support: Wide, especially older devices

WebM WebM Format

Full name: Web Media

Extension: .webm

Best for: Web playback, open source

Compression: Excellent (VP8/VP9)

Quality: High quality, efficient

Device support: Good modern browser support

MOV MOV Format

Full name: QuickTime Movie

Extension: .mov, .qt

Best for: Apple ecosystem, professional editing

Compression: Variable (depends on codec)

Quality: Can be very high quality

Device support: Excellent on Apple, good elsewhere

Bluesky Video Specifications & Limitations

Specification Limit/Requirement Notes
Maximum File Size 50MB per video Automatically compressed if larger
Maximum Duration 60 seconds (1 minute) Videos longer than 60s are rejected
Daily Upload Limit 25 videos OR 10GB Whichever limit is reached first
Videos per Post 1 video maximum Cannot include multiple videos in one post
Supported Resolutions Up to 4K (3840×2160) Higher resolutions may be downscaled
Aspect Ratios 16:9, 9:16, 1:1, 4:5 Other ratios may have black bars
Frame Rate Up to 60 FPS Higher frame rates may be reduced
Audio Required for all videos Silent videos may have issues

⚠️ Important Limitations

  • File size limit is strict: Videos over 50MB will be automatically compressed, potentially reducing quality
  • 60-second maximum: Longer videos are rejected entirely, not trimmed
  • Daily limits reset: The 25 video / 10GB limit resets every 24 hours
  • Processing time: Large files may take longer to process and appear in feeds

Which Format Should You Choose?

For Content Creators

💡 Best Practice Recommendation

Use MP4 with H.264 encoding for the best balance of quality, compatibility, and file size. This format works perfectly on all devices and provides excellent compression.

Format Recommendations by Use Case

General Use
MP4

Best overall choice

Mobile First
MP4

Perfect mobile compatibility

Web Content
WebM

Optimized for browsers

Apple Users
MOV

Native Apple support

Legacy Devices
MPEG

Older device compatibility

File Size Priority
WebM

Best compression ratios

Detailed Format Comparison

MP4 (Recommended)

✅ Advantages

  • Universal device compatibility
  • Excellent compression efficiency
  • Wide software support
  • Perfect for social media
  • Small file sizes
  • Fast upload and processing

❌ Limitations

  • Proprietary format (licensing)
  • Limited to H.264/H.265 codecs mainly
  • May require patent fees for commercial use

WebM

✅ Advantages

  • Open source and royalty-free
  • Excellent compression (VP9 codec)
  • Great for web delivery
  • Good quality at low bitrates
  • Future-proof format

❌ Limitations

  • Limited support on older devices
  • Not native on iOS/Safari
  • Fewer editing software options
  • Slower encoding times

MOV

✅ Advantages

  • Excellent quality retention
  • Perfect for Apple ecosystem
  • Professional editing support
  • Supports many codecs
  • Good for high-quality content

❌ Limitations

  • Larger file sizes typically
  • Limited Android support
  • May need conversion for web
  • Slower processing on some platforms

MPEG

✅ Advantages

  • Wide compatibility with older devices
  • Established standard
  • Good for broadcasting
  • Reliable playback

❌ Limitations

  • Larger file sizes
  • Less efficient compression
  • Older technology
  • Limited modern features
  • May hit 50MB limit quickly

Video Quality and Compression on Bluesky

How Bluesky Handles Video Compression

Bluesky automatically processes all uploaded videos to ensure optimal playback across different devices and network conditions:

Maximizing Video Quality on Bluesky

🎯 Pro Tips for Best Quality

  1. Stay under 50MB: Avoid automatic compression by keeping files small
  2. Use H.264 codec: Most compatible and efficiently compressed
  3. Optimize bitrate: Use 1-5 Mbps for good quality without large files
  4. Choose standard resolutions: 1080p (1920×1080) or 720p (1280×720)
  5. Use standard frame rates: 24, 30, or 60 FPS work best
  6. Include audio: Even if minimal, audio is required

Recommended Video Settings

Setting Recommended Value Why
Format MP4 (H.264) Best compatibility and compression
Resolution 1920×1080 (1080p) Good quality, manageable file size
Frame Rate 30 FPS Smooth motion, smaller files than 60 FPS
Video Bitrate 2-4 Mbps Good quality without large files
Audio Bitrate 128-256 kbps Clear audio without bloating file size
Audio Format AAC Best compatibility and compression

Downloading Bluesky Videos: Format Considerations

What Format Will You Get When Downloading?

When you download videos from Bluesky using our tool, you can choose your output format regardless of the original upload format:

Why Choose MP4 for Downloads?

📱 Maximum Compatibility

MP4 downloads work perfectly on:

  • All smartphones (iPhone, Android)
  • All computers (Windows, Mac, Linux)
  • All video editing software
  • All social media platforms
  • All streaming devices
  • All web browsers

Frequently Asked Questions

Can I upload videos longer than 60 seconds to Bluesky?

No, Bluesky has a strict 60-second limit for video duration. Videos longer than this will be rejected during upload. You'll need to trim your video to 60 seconds or less before uploading.

What happens if my video is larger than 50MB?

Bluesky will automatically compress your video to meet the 50MB limit. This compression may reduce the quality, so it's better to optimize your video beforehand to maintain control over the quality.

Why does my MOV file look different on Bluesky?

Bluesky may convert or compress MOV files during processing to ensure compatibility across all devices. The platform optimizes all videos for web delivery, which can change the appearance slightly.

Which format gives the best quality on Bluesky?

MP4 with H.264 encoding typically gives the best results because it's natively supported and requires minimal processing by Bluesky. This reduces the chance of additional compression that could affect quality.

Can I upload WebM files to Bluesky?

Yes, Bluesky supports WebM uploads. However, MP4 is generally recommended for broader compatibility, especially if your audience uses various devices and platforms.

Do different formats affect how quickly videos load?

Yes, file size and compression efficiency affect loading times. MP4 and WebM typically load faster due to better compression, while MPEG and some MOV files may be larger and slower to load.

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