S05 Libvpx Best — Vera

Achieving “Vera S05” Quality: Best Practices for libvpx (VP8/VP9) Encoding

2. The "Golden" Settings for Quality

To get the "best" output, you need to balance quality (CRF) against speed.

Second pass identical but -pass 2

Expected performance: 1080p @ 0.8-1.2 fps; 720p @ 2-3 fps. A 10-minute video encodes in ~5 hours. The output is indistinguishable from x264 at half the bitrate. vera s05 libvpx best

Benchmark: The "Best" Trade-off

| Setting | FPS (Vera S05) | Visual Quality | Use Case | | :--- | :--- | :--- | :--- | | libvpx -cpu-used 0 | 0.8 fps | Masterpiece | Don't bother. | | libvpx-vp9 -cpu-used 2 (Tuned) | 8-12 fps | Excellent (CRF 30) | Plex/Jellyfin transcoding | | libvpx -cpu-used 5 (Real-time) | 25-30 fps | Fair (Visible blocks) | Home assistant camera feed | Achieving “Vera S05” Quality: Best Practices for libvpx

2. CPU Usage (-cpu-used)

• Range: 0 (best quality, slowest) to 5 (fastest, worst compression).
• Best Quality: -cpu-used 0 (expect 0.1-0.3 fps on 1080p).
• Best Speed: -cpu-used 5 (may achieve 5-8 fps on 720p).
• Best Efficiency: -cpu-used 2 (the "goldilocks" zone for ARM).

Optimization Tips for Vera S05 Hardware

To truly get the "best" performance on a Vera S05, you must treat the hardware gently: Expected performance: 1080p @ 0

1. Thermal Throttling: Software encoding pushes the CPU to 100%. If your Vera S05 is in an enclosed case, it may throttle. Ensure active cooling or good airflow.
2. SD Card Speed: Writing high-bitrate video streams requires a fast SD card (Class 10 / UHS-I or better). A slow card will cause the encoder to stutter, resulting in dropped frames.
3. Resolution Downscaling: If you are processing 4K content on the S05, consider downscaling to 1080p. The Libvpx encoder struggles with real-time 4K encoding on embedded chips.
   • Add this flag to downscale: -vf scale=1920:1080