### Brief ### This torrent contains a BDRip of TV Anime "Gochuumon wa Usagi Desuka?? BLOOM" encoded in AV1 video format and OPUS audio format, containerized in WEBM format. AV1 is a next gen video codec developed by Alliance for Open Media(AOMedia), it's royalty free and open source. The efficiency of AV1 outperforms H.264 and H.265. Big tech firms including Google, Netflix, Apple, Intel, AMD etc. are founders of AOM. > I can't play these files! AV1 and webm is already widely supported, it it recommended to use VLC / MPV / IINA / MPC-HE / MPC-BE for your computer or VLC / MXPlayer / nPlayer for your phone as your media player. You can even watch them in your web browser directly. Windows 10 and Android 10 have native support for WEBM and AV1, you can open them directly. ### 簡介 ### 這份Torrent內容為使用AV1視訊編碼, OPUS音訊編碼, WEBM封裝電視動畫 「請問您今天要來點兔子嗎?? BLOOM」 的BDRip. AV1 是下一代的視訊編碼, 為開放媒體聯盟所開發(AOMedia), 它免收專利費, 自由, 並且完全開源. AV1的編碼效率比H264, H265都要高. 大型IT企業包括Google, Netflix, Apple, Intel, AMD是AOM的創始成員. > 我播放不出來!! AV1已經廣泛應用, 在電腦播放請使用VLC / MPV / IINA / MPC-HE / MPC-BE, 在手機上請用VLC / MXPlayer / nPlayer. 您甚至可以在網路瀏覽器上直接播放! 並且Windows 10和Android 10內建AV1/WEBM解碼器, 可以直接播放. ---------------------------- ### Brief explanation of encoding parameters ### _The video clip is pre-processed by VapourSynth with strong debanding and slight sharpening._ _Gochiusa BLOOM was produced by a new company named "Encourage Films", color bandings in their works are disastrous._ `Encoder: AOMENC from Google and AOM, version 3.1.0 Celestia` --cpu-used is simillar to presets in x265. which controls speed/quality, --end-usage=q indicates ConstantQ mode, simillar to CRF, --cq-level is like CRF value. --auto-alt-ref means automatic placement of AltRef frames. AltRef is a special frame acts like a keyframe, which can be used for prediction.[1] --row-mt is row based multi-threading, on by default. --tile are unique feature to AV1, it splits the video into _tiles_, in this Rip, video is splitted into 4 columns. Each tile can be considered as an independent frame and can be decoded simultaneously. AV1 has high complexity for decoding, tiling could boost decoding speed by a lot while trading off just a small amount of extra bits. --enable-cfl-intra is a unique technology in AV1, which is chroma prediction from luma. This is extremely useful for Anime contents. The encoder predicts chroma information from luma plane, illustrations benifets from this technology a lot. --kf-max-distance is the maximum distance of keyframe, simillar to GOP size in MPEG codecs. aomenc automatically place keyframes based on scene detection which is the most efficient way placing kf. However, the default value is 9999 and aiming best bitrate saving, considering high complexity of AV1, it should be much smaller. [1]: https://github.com/OpenVisualCloud/SVT-AV1/blob/master/Docs/Appendix-Alt-Refs.md ### Comparison ### https://slow.pics/c/UOeJ8Hrt https://slow.pics/c/jILjKXet Before | After -------- | -------  |   |  ### Technical Info ### `Average PSNR (Overall/Avg/Y/U/V) 51.269 52.899 52.255 54.632 54.797 2094445 bps 42301877 ms ` ``` Mediainfo of EP12 General Complete name : EP12.webm Format : WebM Format version : Version 4 File size : 367 MiB Duration : 23 min 36 s Overall bit rate : 2 176 kb/s Writing application : Lavf59.2.101 Writing library : Lavf59.2.101 ENCODER_SETTINGS : version:v3.1.0 --cpu-used=4 --end-usage=q --cq-level=16 --target-bitrate=0 --bit-depth=10 --threads=8 --passes=2 --pass=2 --auto-alt-ref=1 --row-mt=1 --tile-columns=2 --tile-rows=0 --kf-max-dist=240 --fps=24000/1001 --width=1920 --height=1080 --input-bit-depth=10 --i420 --psnr --verbose --webm --fpf=EP12_VS_210529.webm.log Video ID : 1 Format : AV1 Format/Info : AOMedia Video 1 Format profile : [email protected] Codec ID : V_AV1 Duration : 23 min 36 s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 10 bits Language : English Default : Yes Forced : No Color range : Limited Audio ID : 2 Format : Opus Codec ID : A_OPUS Duration : 23 min 36 s Channel(s) : 2 channels Channel layout : L R Sampling rate : 48.0 kHz Bit depth : 32 bits Compression mode : Lossy Delay relative to video : -7 ms Writing library : Lavc59.1.100 libopus Default : Yes Forced : No ```