OBS Bitrate Settings for Twitch: A Practical Guide
Most streaming quality problems trace back to one number set wrong: the bitrate in OBS. Here’s how to choose it from first principles — your internet connection — instead of copying whatever a YouTube tutorial used.
Start from your upload speed, not your ambitions
Run a speed test and note the upload figure (not download). Your streaming bitrate must fit inside it with room to spare, because the same connection also carries game traffic, Discord, alerts and chat.
The rule: total bitrate ≤ 70% of measured upload.
| Your upload speed | Practical streaming ceiling |
|---|---|
| 5 Mbps | ~3,500 kbps |
| 10 Mbps | ~6,000 kbps (Twitch’s cap anyway) |
| 20+ Mbps | 6,000–8,000 kbps — bitrate stops being your constraint |
Twitch’s standard ingest cap is around 6,000 kbps (8,000 for some partners). Unlike YouTube, Twitch (for non-partners) often serves viewers your original encode with no re-encoding — so every viewer on a phone or hotel Wi-Fi receives exactly the bitrate you send. That’s why “maxing out” isn’t automatically right: 6,000 kbps can buffer for viewers on weak connections when no quality options exist.
Recommended combinations
| Output resolution | Bitrate | When |
|---|---|---|
| 1080p60 | 6,000 kbps | Strong upload, fast-motion games, partner/quality-options likely |
| 936p60 (1664×936) | 5,000–6,000 kbps | The sweet spot most streamers should try |
| 900p60 / 864p60 | 4,500 kbps | Mid-tier connections |
| 720p60 | 3,500–4,000 kbps | Limited upload; still perfectly watchable |
| 720p30 | 2,500–3,000 kbps | Weak connections, IRL/mobile streaming |
The counterintuitive truth: 1080p60 at 6,000 kbps is starved for fast-motion content. Those pixels need more data than the cap allows, so everything smears in action scenes. Dropping to 936p or 900p gives every remaining pixel more bits — motion holds together visibly better, and downscaled-from-1080 looks sharp. Try it for one stream; most people never go back.
Audio: 160 kbps AAC (128 minimum, 192 if you have headroom) — it comes out of the same total budget.
Encoder settings that matter
- Encoder: hardware (NVENC on NVIDIA, AMF on AMD, QuickSync on Intel) — modern hardware encoders match x264’s quality at zero CPU cost for streaming purposes.
- Rate control: CBR — constant bitrate is what streaming platforms expect; VBR causes buffering spikes.
- Keyframe interval: 2 seconds — required by Twitch.
- Preset: NVENC “Quality” is the sensible default; “Max Quality” buys little.
Dropped frames? It’s the connection, not the settings
“Dropped frames” in OBS means your connection couldn’t sustain the bitrate right now. The fixes, in order of effectiveness: lower the bitrate 20%; use ethernet instead of Wi-Fi; close upload-hungry apps (cloud backups are notorious); pick a closer ingest server. Encoder overload (“encoding lagged frames”) is the different problem — that one’s your GPU/CPU, fixed by a faster preset or lower resolution.
Planning a VOD or local recording?
Streaming bitrates are compromise bitrates. If you also record locally for YouTube uploads, record at a higher quality (CQP/CRF mode, or 40+ Mbps) in a separate output — see our YouTube bitrate guide. And to know how big those recordings will get per hour, our file size calculator has a Twitch/OBS preset built in.