| cargo features | function |
|---|---|
| open-camera | open camera via v4l2 on VideoServer |
| no-default-features | build without rweb/ffmpeg/decoder |
| environment | function |
|---|---|
| CARGO_FEATURE_PREBUILD | use prebuild ffmpeg |
| CARGO_FEATURE_STATIC | build static ffmpeg lib |
| FFMPEG_DIR | specify prebuild ffmpeg dir |