IINA Version

1.3.5

Release Channel

Release

macOS Version

15.2

Steps to Reproduce

1.	Play a video.
2.	Switch to Full-Screen mode.

Expected Behavior

The transition to Full-Screen mode should occur smoothly without interruptions to video or audio playback.

Actual Behavior

Even on the most modern Macs (e.g., M3-based machines), entering Full-Screen mode during video playback results in dropped frames, video stutter, and audio interruptions. The issue appears related to the resource-intensive GUI transition animation for Full-Screen mode.

A possible solution: Is there an option (e.g., a flag or parameter) to disable the animation and enable a direct, seamless transition to Full-Screen mode?

Crash Report or Process Sample

No response

Logs

No response

Sample Files

No response

How often can you reproduce the issue

Occurs consistently with all videos, regardless of resolution, codec, or complexity.

Required Actions

• I tried my best to search from the existing issues (including closed issues) and didn't find duplicated issues.

Optional Actions

• I tested with the Nightly build and confirmed the issue is not fixed.
• I tested with the latest version of mpv and confirmed mpv doesn't have this issue.