Fix Lỗi OBS Bị Lag Khi Stream

Fix Lỗi OBS Bị Lag Khi Stream

OBS (Open Broadcaster Software) is a powerful tool for streaming, but encountering lag can be frustrating. This article provides practical solutions to troubleshoot and fix OBS lag issues while streaming.

Xác Định Nguyên Nhân Gây Lag

Before jumping into solutions, it's crucial to pinpoint the cause of the lag. Several factors contribute to OBS performance issues:

• High CPU Usage: OBS requires significant processing power, especially when encoding video.
• Insufficient Bandwidth: Your internet upload speed needs to be high enough to support your stream's bitrate.
• Graphics Card Overload: Encoding and rendering video can strain your GPU.
• Incorrect OBS Settings: Suboptimal settings can lead to performance bottlenecks.

Các Bước Khắc Phục Lỗi Lag OBS

Here are some proven methods to reduce lag in OBS:

1. Lower Video Resolution and Frame Rate: Start by reducing your resolution to 720p (1280x720) or even 480p (854x480). Lowering the frame rate to 30 FPS can also significantly reduce CPU load. Navigate to Settings > Video to adjust these parameters.
2. Adjust Output Settings:
   • Encoder: Experiment with different encoders. Try "x264" (CPU-based) or your GPU's encoder (e.g., NVENC H.264 for NVIDIA cards, AMF H.264 for AMD cards). NVENC often performs better with less CPU usage, but x264 may offer higher quality at lower bitrates.
   • Bitrate: Lower your bitrate. If you're streaming to Twitch, a bitrate of 2500-3500 kbps is generally sufficient for 720p at 30 FPS. For YouTube, a bitrate of 3000-6000 kbps is recommended for 720p at 30 FPS. Check your internet upload speed using a speed test website (e.g., speedtest.net) and ensure your bitrate is well below your upload speed. Go to Settings > Output > Streaming to configure these settings.
3. Optimize Scene Sources: Reduce the number of active sources in your scene. Disable or remove unnecessary webcams, overlays, and browser sources. Browser sources, in particular, can be resource-intensive.
4. Close Unnecessary Applications: Close any programs running in the background that are consuming CPU or GPU resources. This includes web browsers, games you're not streaming, and other resource-intensive applications.
5. Update Drivers: Ensure your graphics card drivers are up to date. Outdated drivers can cause performance issues and compatibility problems.
6. Adjust Process Priority: Set OBS's process priority to "Above Normal" in Task Manager (Ctrl+Shift+Esc). This gives OBS more resources. Be cautious as this can impact other applications.
7. Check Your Internet Connection: A stable and fast internet connection is crucial. Troubleshoot your network connection and consider using a wired connection (Ethernet) instead of Wi-Fi.

By following these steps, you should be able to significantly reduce or eliminate lag issues in OBS and enjoy a smoother streaming experience. Remember to test your settings after each adjustment to see what works best for your system and internet connection.