X Video Upload Specs 2026: Size, Length, FPS and Bitrate Limits

Quick answer: For a reliable X video upload, export an H.264 MP4 at 1920×1080 or 1080×1920, 30 fps, and below X’s web limits of 40 fps and 25 Mbps. X officially allows resolutions from 32×32 up to 1920×1200 landscape or 1200×1900 portrait, with aspect ratios from 1:2.39 to 2.39:1.

Last verified: August 31, 2026

X video specifications at a glance

Setting	Official web limit	Practical recommendation
Minimum resolution	32×32	Avoid anything below 720p
Maximum resolution	1920×1200 landscape; 1200×1900 portrait	1920×1080 or 1080×1920
Aspect ratio	1:2.39 to 2.39:1	16:9, 1:1 or 9:16
Maximum frame rate	40 fps	30 fps
Maximum bitrate	25 Mbps	6–12 Mbps for 1080p
Premium long upload	Under 4 hours at 1080p, up to 16 GB; special 720p rule above 2 hours	Use shorter, focused videos when reach is the goal

Best export settings for X

Use an MP4 container with H.264 video and AAC audio. For landscape, export 1920×1080. For a full-screen vertical asset, 1080×1920 stays within the published portrait maximum. Use a constant 30 fps and keep the bitrate comfortably below 25 Mbps. A practical 8 Mbps target works for many 1080p talking-head and screen-recording videos; detailed sports or gaming footage may benefit from 10–15 Mbps.

Step-by-step export checklist

Choose 16:9 for landscape, 1:1 for feed-focused graphics, or 9:16 for vertical viewing.
Keep the long edge within the official maximum.
Export progressive H.264 video in an MP4 container.
Use a constant frame rate no higher than 40 fps.
Keep video bitrate below 25 Mbps.
Use AAC audio at 48 kHz.
Check that text remains readable in the timeline preview.

Standard accounts versus Premium uploads

X’s official help page highlights larger long-form allowances for Premium subscribers. Premium users can upload videos shorter than four hours at 1080p with a maximum file size of 16 GB. Videos above two hours and under four hours must use 720p. Do not assume that a long allowance guarantees audience retention or fast processing; it only defines what the account may upload.

Automatic looping and captions

X says videos of 60 seconds or less automatically loop. That makes a clean ending useful for short demonstrations and motion graphics. Captions are also important because videos can autoplay without sound. Add a caption track where the workflow supports it, or burn in accurate subtitles with enough margin and contrast.

Why X rejects or damages a video

The frame rate exceeds 40 fps.
The bitrate exceeds 25 Mbps.
The portrait or landscape dimensions exceed the published maximum.
The aspect ratio falls outside the supported range.
The file uses a codec or container that X cannot process reliably.
A variable frame-rate recording causes audio drift or processing failure.

FAQ

Can I upload 4K video to X?

The regular web specifications list maximum dimensions below 4K. Export a controlled 1080p delivery file unless a current account-specific workflow explicitly offers something different.