Blurriness and Block-Artifacts
Description
- Significant blurriness and visible block-artifacts using M8
- In some cases the block-artifact issue can be improved by adding
--enable-tf 0
to the command line
- In some cases the block-artifact issue can be improved by adding
- These issues are less noticeable (or non-existent) in x265 cpu8, i.e., the overall quality is better
-
The same was observed when comparing svt M12 to x264 cpu8
- I.e., svt M12 showed more blurriness and block-artifacts than x264 cpu8 (except CrowdRun_1920x1080_50p_420_8bit, where the quality is similar)
Clips
- CrowdRun_1920x1080_50p_420_8bit
- MusicVideo_1080P-55af
- ParkJoy_1920x1080_8bit_50Hz_P420
- Sports_1080P-08e1
- Sports_1080P-5d25
Issue Configuration
- Preset: 8
- TBR or QP used: 4000kbps
-
Encoder revisions:
- svt-av1: 314bc5ed
- x265: 3.5
- Platform: Linux
Sample Command Lines
svt-av1
./SvtAv1EncApp --preset 8 --passes 1 --rc 1 --tbr 4000 --keyint 150 --enable-tpl-la 1 -i Sports_1080P-5d25.y4m -b bitstreams/svt_M8_Sports_1080P-5d25_RC_TBR_4000Kbps.bin
x265
./x265 --preset 8 --stats bitstreams/x265_M8_Sports_1080P-5d25_TBR4000.stat --bitrate 4000 --keyint 150 --min-keyint 150 Sports_1080P-5d25.y4m -o bitstreams/x265_M8_Sports_1080P-5d25_TBR4000.bin