Thanks for the detailed info—you're clearly doing a lot right already, and the issue you're facing is a common one when exporting videos for multiple devices. The good news is: you're not doing anything wrong in your After Effects or Media Encoder workflow—this is mostly about color management and how different devices interpret color profiles.
:右に傾いた虫メガネ: TL;DR:
Your Fire TV Stick is likely misinterpreting or exaggerating the color profile of your video. It’s not necessarily the file’s fault—it’s how the Fire TV (and sometimes the TV it's plugged into) interprets it.
:白い太字のチェックマーク: What’s Likely Happening
The main culprit is usually color profile mismatches, especially when uploading to platforms like YouTube. Here’s what’s probably going on:
:パレット: 1. Color Profile: HD (1-1-1)
This indicates a Rec. 709 color space, which is standard for web video—but some TVs and streaming devices treat Rec. 709 videos as Rec. 2020 or HDR, boosting color saturation and contrast.
So on:
:白い太字のチェックマーク: MacBook & iPhone → Interpreted correctly (Rec. 709)
:バツ印: Fire TV Stick → Misinterpreting it as HDR or Rec. 2020, hence the oversaturation
:レンチ: How to Fix or Minimize This
:白い太字のチェックマーク: Option 1: Convert to Limited Range (legal range)
TVs often expect limited range (16–235) rather than full range (0–255). If you export in full range, it might look too vibrant on TV.
Steps:
In Media Encoder, under Video settings:
Note: H.264 doesn’t always expose this in the GUI, but using a custom LUT or editing in an adjustment layer that slightly compresses contrast before export can help.
:白い太字のチェックマーク: Option 2: Burn in a Rec. 709 Color LUT
If you want consistent color across devices, burn in a Rec. 709 LUT that ensures proper color display.
In After Effects, apply a Rec. 709 conversion LUT on an adjustment layer.
Export as usual to H.264 via Media Encoder.
Upload that version to YouTube.
LUTs like Rec709-A (Apple’s variation) help when coming from HDR-capable workflows.
:白い太字のチェックマーク: Option 3: Use ProRes for Upload (if you're a perfectionist)
YouTube re-encodes everything anyway, so some users upload Apple ProRes 422 HQ or DNxHR to preserve color accuracy—then let YouTube handle the compression.
You can export ProRes via Media Encoder → Format: QuickTime, Preset: Apple ProRes 422 HQ.
This avoids the weird gamma shifts that H.264 sometimes introduces.
:白い太字のチェックマーク: Bonus Tip: Check Fire TV Display Settings
Sometimes the Fire TV Stick itself is set to HDR mode always, even for non-HDR content.
On your Fire TV:
Summary of Fixes:
Fix What It Does
| :白い太字のチェックマーク: Export in limited color range | Prevents oversaturation on TVs |
| :白い太字のチェックマーク: Apply Rec. 709 LUT | Forces color consistency |
| :白い太字のチェックマーク: Check Fire TV HDR settings | Prevents forced HDR upscaling |
| :白い太字のチェックマーク: Export in ProRes | Highest color accuracy, best for YouTube |
If you want, I can walk you through creating a simple Rec. 709 LUT or adjustment layer setup in After Effects. Would that help?
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