Why AV1 Encoder so laggy?

[Deathphobia11]

Environment

• OS: Windows 11 23H2
• Scrcpy version: 3.1
• Installation method: Windows release
• Device model: TECNO POVA 6 Pro 5G
• Android version: 14

Describe the bug

My device can run smoothly on H.265 bitrate 16M but AV1 absolutely lag and very much latency.

ps. sorry for my language.

My PC
Intel i5-13500
Geforce RTX4070
RAM DDR5 16GBx2 6400Mhz

[rom1v]

Your device has probably no hardware encoder for AV1 (so it uses a software encoder).

Check with scrcpy --list-encoders.

[Deathphobia11]

Thank you for your reply.

I use software encoder but still so laggy. Because my device has no hardware encoder. Right?

[rom1v]

Yes, your AV1 encoder is software (sw), that's why it is slow.

A software encoder for real-time mirroring in AV1 is basically unusable, unless you use a very small resolution (scrcpy --video-codec=av1 -m600), and even then it is probably slower than a hw encoder.