[Panduan Streaming] Optimization – Bitrate, Resolution, CPU/GPU Tuning

Pendahuluan: Best Settings Tidak Ada

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“Best settings” adalah myth. Hanya “best-for-you” settings yang penting. Artikel ini ajarkan cara find YOUR sweet spot.

Langkah 1: Check Internet Speed Anda

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1. Kunjungi speedtest.net
2. Klik “Go” dan tunggu results
3. Catat UPLOAD speed Anda (bukan download)

Formula: Max safe bitrate = (Upload speed dalam Mbps × 0.7) × 1000

Contoh: 10 Mbps upload → 7000 kbps max bitrate

Resolution vs. Bitrate Tradeoff

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Quality formula: Bitrate + Resolution + Encoder = Perceived Quality

• 1080p@3000 kbps terlihat lebih jelek dari 720p@5000 kbps (same encoder)
• Mengapa? Bitrate rendah = lebih banyak compression artifacts di res tinggi
• Solusi? Start dengan 720p@4500 kbps

Common Profiles

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• 720p @ 4500 kbps: Quality-focused, stable internet
• 720p @ 3500 kbps: Balanced, moderate internet
• 1080p @ 6000 kbps: Expert, very stable internet (10+ Mbps upload)

CPU vs. GPU Encoding Deep Dive

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CPU (x264):

• CPU load tinggi impacts game FPS jika tidak hati-hati
• Better quality per bitrate
• Gunakan preset “faster” atau “veryfast” jika game lag

GPU (NVENC/QuickSync/VCE):

• Minimal game impact (dedicated hardware)
• Slightly lower efficiency per bitrate
• Recommended untuk gameplay streaming

Performance Monitoring

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Enable OBS Stats (View → Stats) dan watch untuk:

• FPS: Harus match setting Anda (60 atau 30). Jika dropping, lower bitrate atau CPU preset.
• Dropped Frames: Harus <1%. Jika >1%, bitrate terlalu tinggi untuk internet Anda.
• Output Bitrate: Harus match setting ±10%.
• Audio Bitrate: Harus ~128 kbps untuk stereo.

Optimization Decision Tree

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1. Run speedtest → catat upload speed
2. Calculate max bitrate (upload × 0.7)
3. Pick resolution (start dengan 720p)
4. Pick bitrate (berdasarkan upload, atau lower untuk safety)
5. Run test stream (10 menit)
6. Monitor stats: dropped frames? audio pops?
7. Jika issues: lower bitrate 500 kbps, repeat langkah 5
8. Jika quality jelek: raise bitrate jika internet allow, repeat langkah 5
9. Ketika satisfied: save sebagai profile

Optimization Checklist

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• Internet speed tested (upload speed dicatat)
• Max bitrate calculated (70% dari upload)
• Resolution dipilih (720p direkomendasikan)
• Encoder dipilih (GPU jika available)
• FPS set (60 untuk action, 30 untuk talk)
• Scene sources streamlined (remove unused)
• Audio levels normalized (peak di -6dB)
• Test stream dijalankan (5-10 min, metrics checked)
• Backup diverifikasi (recent backup ada)

Game Capture Optimization

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• Game Capture: Lowest CPU, works untuk sebagian besar games
• Window Capture: Lebih compatible, slightly higher CPU
• Screen Capture: Highest CPU, last resort

Coba Game Capture dulu. Jika black screen, coba Window Capture (game dalam windowed mode).

Scene Complexity Impact

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Terlalu banyak sources/filters = lag. Checklist:

• Remove unused sources
• Disable filters yang tidak Anda gunakan
• Simplify overlays (lower resolution jika possible)
• Reuse sources di antara scenes (jangan duplicate)

Adaptive Bitrate (Kapan Use/Disable)

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• Use: Unstable internet, auto-adapts ke conditions
• Disable: Stable internet, want consistent quality

Sebagian besar streamers: Disable.

Langkah Berikutnya: Troubleshooting

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Hit issue? Artikel 5: Advanced Troubleshooting & Debugging punya symptom-indexed solutions.

FAQ

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“Mengapa bitrate saya terus berubah?”

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Likely adaptive bitrate is on. Go ke Settings → Stream, cari bitrate field. Jika ada checkbox untuk “Use Adaptive Bitrate”, uncheck.

“Game lag saat streaming”

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Lower encoder preset (x264: fast → faster → ultrafast) atau switch ke GPU encoder (NVENC/QuickSync).

“Quality masih jelek meski bitrate tinggi?”

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Check: (1) Internet Anda actually stable, (2) Anda tidak dropping frames, (3) Encoder preset tidak terlalu fast.

“Bisakah saya gunakan different settings untuk different games?”

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Ya—create profiles (Artikel 2). Contoh: “Gaming_HighFPS” untuk competitive games, “Gaming_Cinematic” untuk single-player.