video-streaming - What are the correct x264 settings to achieve the lowest latency possible?

Question

I'm making a streaming system than consists of

1. backend - generates and encodes 1280x720@30fps with libx264 and sends NALUs to frontend over UDP
2. frontend - receives frames from backend, decodes with ffmpeg and draws on the screen

I'm trying to achieve the lowest latency possible.

• What is the lowest achievable latency?
• What are the correct settings for the encoder?
• What should I take into account?

Answer 1

最简单的方法是设置 –intra-refresh –-tune zerolatency 并设置 –vbv-bufsize 等于您的比特率除以帧率。请注意，由于缺少 B 帧和其他优化，这些设置可能会产生质量较低的视频。