VP9 specific options¶
vp9_hdr¶
not implemented
vp9_deadline¶
This sets the deadline parameter for libvpx. The default value is good. The options are:
| Deadline | Quality |
|---|---|
| realtime | Fastest encoding, but less quality |
| good | Default encoding |
| best | Very slow encoding but better quality |
vp9_yuv420p¶
This forces it to translate the video to YUV420 before encoding, this is required for most video players so it is true by default.
vp9_crf¶
This sets the constant rate factor. The CRF controls the output quality. The range is 0-63
Recommended values
| Resolution | CRF |
|---|---|
| 240p | 37 |
| 360p | 36 |
| 480p | 33 |
| 720p | 32 |
| 1080p | 31 |
| 1440p | 24 |
| 2160p | 15 |