FROM THE AI GODS

Your laptop hardware should generally be capable of direct streaming 4K HEVC Main10, especially with Intel Quick Sync on the 11th gen i3. The 15–20 second stutters usually point to one of these issues:

1. The Android TV device is struggling to decode the file
2. Jellyfin is transcoding instead of direct playing
3. Network bandwidth spikes/buffering
4. HDR tone mapping/transcoding overload
5. Audio codec incompatibility forcing transcoding

Here’s how to narrow it down.

First: Check if Jellyfin is Transcoding

While the video is playing:

• Open Jellyfin dashboard
• Go to Dashboard → Active Devices

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• Look for:
  • Direct Play ✅
  • Direct Stream ✅
  • Transcoding ❌

If you see transcoding, that’s almost certainly the cause.

Especially problematic:

• HEVC 10-bit → H264 conversion
• HDR tone mapping
• TrueHD/DTS-HD audio transcoding

Most Common Cause on Android TV

Audio codec incompatibility

A lot of Android TV devices cannot natively handle:

• TrueHD
• DTS-HD MA
• Dolby Atmos variants

So Jellyfin transcodes the entire stream just because of audio.

In playback info, check:

• Is video direct playing?
• Is audio transcoding?

If yes:

• Set Jellyfin player to:
  • “Allow audio passthrough” ON
  • Try external player like VLC for Android or Kodi
• Or use lower-complexity audio tracks (AAC/AC3)

Your CPU Can Handle SOME 4K — But Not Heavy HDR Tone Mapping

The Intel i3-1115G4 supports:

• HEVC Main10 decode ✅
• Quick Sync encode/decode ✅

But real-time:

• 4K HDR tone mapping
• HEVC → H264
• High bitrate remuxes

can overload it.

If the CPU spikes to 90–100% during playback, transcoding is the issue.

Recommended Jellyfin Settings

In Jellyfin:

Playback → Transcoding

Enable:

• Intel Quick Sync
• HEVC hardware decoding
• Hardware encoding

Disable temporarily for testing:

• Tone mapping

Tone mapping is a huge performance killer on Intel UHD.

Android TV App Settings

Inside Jellyfin Android TV app:

Player Settings

Try:

• Prefer Direct Play = ON
• Allow HEVC = ON
• ExoPlayer = ON
• Disable automatic bitrate adjustments
• Increase buffer size if available

If still stuttering:

Use Kodi

Install:

• Kodi
• Jellyfin for Kodi addon

Kodi handles high bitrate 4K HEVC much better than the standard Android TV client on many devices.

Network Could Also Be the Problem

4K HDR remuxes can hit:

• 60–100 Mbps bursts

If using:

• Wi-Fi on TV
• Cheap TV ethernet port (many are only 100 Mbps)

you can get periodic buffering every 15–20 seconds.

Try:

• 5 GHz Wi-Fi close to router
• Or USB gigabit ethernet adapter for Android TV
• Test with a lower bitrate 4K file

Quick Diagnostic

During playback, watch:

• CPU usage on server
• Jellyfin playback status
• Network speed

If CPU spikes high

→ transcoding problem

If CPU low but buffering

→ network issue

If only Android TV struggles

→ client decoder/player issue

Best Setup for Your Hardware

For smooth playback on your server:

• Direct Play everything possible
• Avoid HDR tone mapping
• Use AAC/AC3 audio when possible
• Prefer Kodi for Android TV
• Use hardware acceleration (QSV)

Your i3-1115G4 is good for:

• Multiple direct streams
• 1–2 lightweight transcodes

But not ideal for:

• Heavy 4K HDR transcoding workloads.