libvpx-1.8.0

[Bruce Dubbs]

New minor version.

[Bruce Dubbs]

2019-01-31 v1.8.0

This release focused on encoding performance for realtime and VOD use cases.

• Upgrading: This adds and improves several vp9 controls. Most are related to SVC:
  • VP9E_SET_SVC_FRAME_DROP_LAYER:
    • Frame dropping in SVC.
  • VP9E_SET_SVC_INTER_LAYER_PRED:
    • Inter-layer prediction in SVC.
  • VP9E_SET_SVC_GF_TEMPORAL_REF:
    • Enable long term temporal reference in SVC.
  • VP9E_SET_SVC_REF_FRAME_CONFIG/VP9E_GET_SVC_REF_FRAME_CONFIG:
    • Extend and improve this control for better flexibility in setting SVC pattern dynamically.
  • VP9E_SET_POSTENCODE_DROP:
    • Allow for post-encode frame dropping (applies to non-SVC too).
  • VP9E_SET_SVC_SPATIAL_LAYER_SYNC:
    • Enable spatial layer sync frames.
  • VP9E_SET_SVC_LAYER_ID:
    • Extend api to specify temporal id for each spatial layers.
  • VP9E_SET_ROI_MAP:
    • Extend Region of Interest functionality to VP9.

• Enhancements: 2 pass vp9 encoding has improved substantially. When using --auto-alt-ref=6, we see approximately 8% for VBR and 10% for CQ. When using --auto-alt-ref=1, the gains are approximately 4% for VBR and 5% for CQ.

For real-time encoding, speed 7 has improved by ~5-10%. Encodes targeted at screen sharing have improved when the content changes significantly (slide sharing) or scrolls. There is a new speed 9 setting for mobile devices which is about 10-20% faster than speed 8.

• Bug fixes:
  • VP9 denoiser issue.
  • VP9 partition issue for 1080p.
  • VP9 rate control improvments.
  • Postprocessing Multi Frame Quality Enhancement (MFQE) issue.
  • VP8 multithread decoder issues.
  • A variety of fuzzing issues.

[Bruce Dubbs]

Fixed at revision 21090.