Changes between Version 33 and Version 34 of Encode/AV1

Timestamp:

Mar 18, 2022, 8:04:14 PM (5 years ago)

Author:

veikk0

Comment:

Update on decoder tuning support.

Encode/AV1

@@ -163 +163 @@
 Since SVT-AV1 0.9.1, the encoder also supports tuning for visual quality (sharpness). This is invoked with `-svtav1-params tune=0`. The default value is 1, which tunes the encoder for PSNR.
 
-Also supported since 0.9.1 is tuning the encoder to produce bitstreams that are faster (less CPU intensive) to decode, similar to the `fastdecode` tune in x264 and x265. This feature is invoked with `-svtav1-params fast-decode=X`, with X being an integer from 1 to 3. Higher numbers result in easier-to-decode video.
+Also supported since 0.9.1 is tuning the encoder to produce bitstreams that are faster (less CPU intensive) to decode, similar to the `fastdecode` tune in x264 and x265. This feature is invoked with `-svtav1-params fast-decode=X`, with X being an integer from 1 to 3 ([https://gitlab.com/AOMediaCodec/SVT-AV1/-/commit/0b9ed232adb14846d57fa62c15b5811e52f8034a expanded] to 1-4 in git versions since 2022-03-15). Higher numbers result in easier-to-decode video.
 
-Decoder tuning is only supported for presets from 5 to 10. The level of decoder tuning supported varies by preset.
+In 0.9.1, decoder tuning is only supported for presets from 5 to 10; this was expanded to cover presets 0 to 4 in the git repo on 2022-03-15. The level of decoder tuning supported varies by preset. Presets 0-4 support levels 1-4, presets 5-7 support levels 1-3, presets 8-9 support 1-2, and preset 10 supports level 1.
 
 == Keyframe placement ==