本番由 组员提名,应要求制作。感谢他们为 VCB-Studio 发展做出的无私奉献。
This project was nominated by our members and produced upon request. Thanks to them for their selfless dedication to the development of VCB-Studio.
原盘画质较好,原生分辨率为 855p。线条有一些明显的锯齿,我们采用逆向拉伸重构配合抗锯齿来处理。平面质量较好,基本没有色带,我们只使用了保底的防色带处理。本片的处理重点放在了压制参数的制定上。在最初的版本中,我们采用常规压制参数,但却得到了平均 2.5 GB/集的成品。原因是多方面的:本片作画精细,细节纹理非常丰富,远超一般 TV 动画;全片有大量的暗场和打斗场景;全片镜头有刻意制作的小范围无规则抖动;画面有丰富的动噪。基于以上情况,我们针对性地进行了处理:首先在预处理时削减噪点强度,然后在压制参数上对码率进行再分配,降低整体码率,适当削减暗场和动态场景的码率,将码率更多分配到线条细节纹理等直接影响人眼观感的地方。最终结果是在尽量保持目视效果的同时,将码率压缩到平均 1.7 GB/集,这样一个能让人接受的水平。
GOD EATER has a decent image quality with a native resolution of 855p. There's some aliasing around the lines, not severe but easy to spot. Fixing this includes descaling and reconstruction together with anti-aliasing. The flat areas look great though. There are hardly any colour bands, so we applied only the basic de-banding. The main focus of this project is on encoding parameter tuning. Initially, our baseline settings led to output file sizes of around 2.5 GB/EP. This is because, first, GOD EATER outperforms many other anime TV shows in terms of image quality for its detailed drawing and rich textures. Second, there are lots of dark scenes and fights. Third, the post-production added small, random screen-shaking effects throughout. Lastly, the dynamic noise is very high. We modified the encoding parameters based on these features. During pre-processing, we removed some noise and then adjusted the parameters which in turn re-allocated the bitrate. Dark, and high dynamic scenes were given slightly fewer bitrates so that the bitrates saved were given to the lines and the textures which humans are more sensitive to. The outcome is that we've reduced the file sizes down to a more acceptable 1.7 GB/EP average, while maintaining a comparable level of perceived visual quality.
感谢所有资源提供者 / Thank to all resource providers:
BD&SCAN&SPCD: U2娘@Share, denpa@U2, djc5166
CD: 鴨梨子@Astost, nstz@Animebytes