For her dearest and most precious sister.  --- In v2, we improved grain retention thanks to v2.3.0-C's improved `--psy-rd`. Despite lower SSIMU2 score, we believe we achieved a similar visual quality as v1 while shrinking filesize. We also added an additional filter chain to deal with encoding artefacts in source during action scenes in later episodes. We believe Kekkan should be the best source for this anime on nyaa.si as of right now. --- ### Filtering and Encoding Details slow.pics from episode 01: [https://slow.pics/c/f69bsdJf](https://slow.pics/c/f69bsdJf). The most noticeable artefact throughout this anime is its strong ringing around the lines. We could not find the correct kernel for descaling. For scenes that have smaller descaling error, we use `vsscale.Rescale` and `vsdehalo.edge_cleaner` to filter the frames. For scenes that have larger descaling error, we use `vsdehalo.fine_dehalo` and `vsaa.based_aa` to filter the frames. There are not many action scenes in this anime, but most of them have terrible-looking encoding artefacts in the source. To hopefully minimise the artefacts, specifically for action scenes, we use DPIR to deblock, followed by `vsdehalo.edge_cleaner` and a stronger gaussian-filtering aa to filter the frames. This anime is characterised by its heavy film grain. We opt to keep as much grain as possible during the filtering process. For encoding, we use a modified version of autoboost to deliver a rather high quality encode. This is the SSIMU2 score of episode 01 with film grain removed compared to the filtered source: | Metric | Mean | Standard Deviation | 5th Percentile | | :--: | :--: | :--: | :--: | :--: | | **SSIMU2** | **90.998** | 2.493 | 87.049 | We use SVT-AV1-PSY v2.3.0-Q, and these are the key encoding parameters: `--preset [-1 ~ 0] --crf [11.75 ~ 23.00] --tune 3 --enable-tf 1 --kf-tf-strength 1 --tf-strength 2 --sharpness 0 --film-grain 7 --psy-rd 2.8 --spy-rd 0`. Thanks to all the people creating the tools, plugins and vsfunc's that make this possible, and thanks to everyone in the community for teaching me and giving me advice. You are welcome to join AV1 weeb edition at [https://discord.gg/83dRFDFDp7](https://discord.gg/83dRFDFDp7). ### Media Info | Track | Language | Source | Codec | Remark | | :-- | :-- | :-- | :-- | :-- | | **Video** | Japanese | SubsPlease CR | AV1 | Filtered and Reencoded | | **Audio** | Japanese | SubsPlease CR | AAC | Untouched | | **Subtitle** | English | SubsPlease CR | ASS | 〃 | | **Subtitle** | Portuguese (Brazil) | Erai-raws CR | 〃 | 〃 | | **Subtitle** | Spanish (Latin America) | Erai-raws CR | 〃 | 〃 | | **Subtitle** | Spanish | Erai-raws CR | 〃 | 〃 | | **Subtitle** | Arabic | Erai-raws CR | 〃 | 〃 | | **Subtitle** | French | Erai-raws CR | 〃 | 〃 | | **Subtitle** | German | Erai-raws CR | 〃 | 〃 | | **Subtitle** | Italian | Erai-raws CR | 〃 | 〃 | | **Subtitle** | Russian | Erai-raws CR | 〃 | 〃 | | **Subtitle** | Indonesian | Erai-raws CR | 〃 | 〃 | | **Subtitle** | Malay | Erai-raws CR | 〃 | 〃 | | **Subtitle** | Vietnamese | Erai-raws CR | 〃 | 〃 | | **Subtitle** | Thai | Erai-raws CR | 〃 | 〃 | English chapters included. We recommend using MPV to playback our releases. Thank you for seeding after download.