One-PC Streaming Is Now Practical
One-PC streaming has gone from compromise to standard thanks to modern hardware encoders. The decision tree starts with codec choice.
Codec Selection for Australian Connections
AV1 provides the best quality per bit — helpful on Australian upload links with modest upstream — but viewer device compatibility lags. If your audience watches on recent browsers and devices, AV1 at 6–8 Mbps can look excellent.
HEVC splits the difference on compatibility and quality.
H.264 is universal but artefact-prone at low bitrates. Test your audience profile before committing to a codec.
Thermal Budgeting for Long Sessions
Thermals and power are the real constraints. Reserve headroom:
- Set a slightly lower GPU power target or undervolt so the card doesn't hit thermal walls mid-raid
- Pin OBS to specific CPU cores to reduce cache thrash
- Offload background AI tasks (noise suppression, transcription) to your NPU/CPU to avoid stealing GPU cycles
Configure process priorities carefully: OBS high, game above normal. Verify no background updaters fire during showtime.
OBS Configuration
OBS profiles should be explicit:
- Colour space: Rec.709 for SDR, correct HDR path for HDR workflows
- Keyframe interval matching your platform's guidance
- Encoder presets tuned to your specific GPU encoder
Scene transitions and alert sources are common hitch points — pre-cache media and use simpler transitions if frametime spikes occur. Audio desync often traces to sample-rate mismatches — lock your entire audio graph to 48 kHz.
Test Before Going Live
A test stream to a private destination at your real settings is worth an hour of theory. Monitor:
- Encoder utilisation
- Dropped frames (network vs. render — different causes, different fixes)
- GPU frametimes during scene transitions
If the rig runs hot in Perth summers, schedule streams for cooler parts of the day or aim a case fan at the GPU backplate. Small thermal nudges prevent slow drift into throttling that kills consistency.
Sources: OBS Project (encoder setup, HDR workflows), EposVox (practical streaming tests, AV1/HEVC tuning)