Question
Exporting H.265 4K footage causes green screen artifacts on social platforms
Hi everyone,
I'm experiencing an issue when exporting 4K H.265 footage for Instagram/TikTok. After export, videos display intermittent green screen artifacts during playback on mobile devices (though they look fine in Premiere and on desktop).
My workflow:
- Source footage: iPhone 15 Pro (4K H.265, 30fps)
- Sequence settings: Custom 4K timeline (3840×2160, 30fps)
- Export settings: H.264, 1080p (to meet platform requirements), VBR 2-pass, Target bitrate 15 Mbps
- Using latest Premiere Pro 26.0 on MacBook Pro M3 Max, macOS Sequoia 15.3
I've tried:
✓ Exporting directly vs. via Media Encoder (same result)
✓ Switching to ProRes export then compressing externally with HandBrake
✓ Disabling all effects/transitions on affected clips
✓ Clearing media cache and restarting Premiere
✓ Testing different bitrates (8–25 Mbps)
The green artifacts only appear on mobile social apps—not in VLC, QuickTime, or when previewing the exported file on my computer. Makes me think it's a compatibility issue with how platforms re-encode uploads.
Has anyone else encountered this? Any recommendations for export settings that maintain quality while avoiding platform re-encoding issues?
Thanks in advance!
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