Codec settings

Configure from Project Settings → Resolution → Codec. Default: AV1 primary, H.264 fallback. Streampixel auto-falls-back to the secondary codec when a viewer’s browser or your UE version doesn’t support the primary.

Codec options

Codec	Quality at low bitrate	Compatibility	Notes
AV1 ★ Recommended	Best	Chrome desktop, modern hardware	Highest quality per bit. Recommended primary codec for every use case. Requires UE 5.4+ on the encoder side.
VP9	Good	Chrome, Firefox, Edge	Better quality than H.264 at the same bandwidth. Strong fallback for ArchViz / Digital Twin.
H.264	Blocky	Universal	GPU-accelerated. Safe fallback for the broadest device reach.
VP8	Average	Universal	CPU-decoded — older devices may struggle.

When fallback kicks in

Scenario	What happens
Viewer on iPhone, AV1 primary	iOS doesn’t decode AV1 → falls back to your fallback codec.
Viewer on older Firefox, AV1 primary	Firefox lacks AV1 → falls back.
UE 5.3 or below, AV1 primary	Encoder can’t produce AV1 → falls back globally.

AV1 only works on UE 5.4+. If you’re on an older version, set H.264 or VP9 as primary.

Recommended pairings

AV1 is the recommended primary codec for every use case. Pick a fallback based on your audience.

Use case	Primary	Fallback
ArchViz / Digital Twin	AV1	VP9
Chatbot / Avatar	AV1	H.264
Games / Interactive	AV1	H.264
Mixed devices, broad reach	AV1	H.264

Resolution settings

Pair codec with the right resolution mode.

Performance tuning

Hit your latency, FPS, and bitrate targets.

Resolution settings Other project controls

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Codec options

When fallback kicks in

Recommended pairings

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Resolution settings

Performance tuning

​Codec options

​When fallback kicks in

​Recommended pairings

​Next

Resolution settings

Performance tuning

Codec options

When fallback kicks in

Recommended pairings

Next