QaS - Quality and Size presents
This is a 10-bit HEVC / x265 re-encode of [Shady Crab’s][shady release] 100.2 gb release of Fullmetal Alchemist Brotherhood, its OVA and its specials.
[Reaktor released][reaktor release] a similar x265 re-encode of Fullmetal Alchemist Brotherhood but this one has:
* Surround 5.1 english audio track.
* Some episodes have english comment audio tracks. (I don’t know why not [Reaktor][reaktor release] includes this)
* Better video quality according to some measured video quality metrics (details on technical section)
* Less size
Here are some comparison shots for [Shady Crab’s release][shady release] vs [Reaktor's release][reaktor release] vs mine
[Shady Crab’s (Source):][shady release]
[![91f3ceedb18140277d616daaada62b73.th.png](https://imagetot.com/images/2021/04/07/91f3ceedb18140277d616daaada62b73.th.png)](https://imagetot.com/image/hgiWae) [![b068d5e473578a631d9c25951f043531.th.png](https://imagetot.com/images/2021/04/07/b068d5e473578a631d9c25951f043531.th.png)](https://imagetot.com/image/hgilRN) [![d5a155b0f9614513612bb714b7b106fd.th.png](https://imagetot.com/images/2021/04/07/d5a155b0f9614513612bb714b7b106fd.th.png)](https://imagetot.com/image/hgiqCD)
[Reaktor's (re-encode):][reaktor release]
[![425bc63814d11b2d626d98569593a23b.th.png](https://imagetot.com/images/2021/04/07/425bc63814d11b2d626d98569593a23b.th.png)](https://imagetot.com/image/hgibeO) [![e8379103a5b33847a5806ee8e8940f15.th.png](https://imagetot.com/images/2021/04/07/e8379103a5b33847a5806ee8e8940f15.th.png)](https://imagetot.com/image/hgieX9) [![6f3f9ae3336204fecc3b4c16bda0d42a.th.png](https://imagetot.com/images/2021/04/07/6f3f9ae3336204fecc3b4c16bda0d42a.th.png)](https://imagetot.com/image/hgiovP)
[![bec40d550aaf7c2bb28a2a7ecdf7c91c.th.png](https://imagetot.com/images/2021/04/07/bec40d550aaf7c2bb28a2a7ecdf7c91c.th.png)](https://imagetot.com/image/hgifa1) [![746142d7dadf01c54022fccc5ce94067.th.png](https://imagetot.com/images/2021/04/07/746142d7dadf01c54022fccc5ce94067.th.png)](https://imagetot.com/image/hgijty) [![9641b092b3e37df696109b2ab162e40a.th.png](https://imagetot.com/images/2021/04/07/9641b092b3e37df696109b2ab162e40a.th.png)](https://imagetot.com/image/hginOu)
Actually i didn't want to share these images because videos are not still images and they can't be judged by them. That's why i measured the video quality metrics. According to these my video quality is better than [Reaktor's re-encode][reaktor release]. Details on technical section. Enjoy.
**Recommended Players**: VLC Media Player, Media Player Classic (K-Lite Codec Pack)
1920x1080 23.976 fps HEVC x265 10-bit
English; Opus Surround ~ 256kbit/s
Japanese; Opus Stereo ~128 kbit/s
Some episodes English Commentary; Opus Stereo ~96 kbit/s
English; ASS subtitles
Signs/Song for Dub; ASS subtitles
**Technical Details**: (in case you're interested)
I encoded the default english surround audio track with Opus 256-Kb/s because the recommended bitrate for surround is 256-Kb/s according to [wiki][opus wiki], i encoded the japanese stereo audio track with Opus 128-Kb/s because it says opus at 128-Kb/s for stereo is nearly indistinguishable from the uncompressed source on [wiki][opus wiki]. I encoded stereo english comment audio tracks with Opus 96-Kb/s for decreasing the file size and it’s the minimum recommended setting for stereo according to [wiki][opus wiki]. In case you are asking why i am using opus: [Opus Comparison][opus compare]
I encoded all videos with x265's slower preset and crf 23. One anime episode takes about one and a half hours to encode. I measured three video quality metrics: [PSNR][psnr link], [SSIM][ssim link] and the newest one [VMAF][vmaf link]. PSNR is the oldest one and i think it has the lowest importance because it's a signal to noise ratio and it has nothing to do with human perception of quality. VMAF i think is the most important one because it's developed with human perception of quality in mind. I don't want to go into details on these.
Let's talk about my video metrics. I measured these quality metrics on first episodes only, [Reaktor's][reaktor release] video and mine given the reference video [Shady Crab’s][shady release].
My video PSNR: 38.5909
[Reaktor's][reaktor release] video PSNR: 48.2257
In my defense PSNR looks for pixel-wise noise and it really is a signal-to-noise ratio instead of human quality perception. Yes you guessed it correct my video is more noisier than [Reaktor's][reaktor release] but when we look at the VMAF score we can say the noise is not noticable for human eyes.
My video SSIM: 0.9911
[Reaktor's][reaktor release] video SSIM: 0.9917
There is no reason to talk over this. The difference is minimal.
My video VMAF: 94.9976
[Reaktor's][reaktor release] video VMAF: 94.9814
My aim is to provide more quality for smaller sizes. I know it's a little improvement but i managed to get more video quality at this size and more content like specials, opus 5.1, english comment tracks etc...
**Seed as much as possible please.**
1. I have slow upload speed. Only 512 kb/s. And i have a weekly schedule to uphold. So expect download speed fluctuation. I use [super seeding mode][super link] because of my slow upload speed. So if you won't upload, you can't get any torrent pieces from me until there is more than one seed. I use super seeding mode because i try to shorten the time it takes for initial seeding. I might rent a seedbox but that's extra cost for me. I paid electricity and hardware price already and monthly seedbox price is a burden i can't overcome. If there is a huge request for seedbox i can start a discord server and accept donations through discord shared bitcoin address but i'm guessing nobody will request a seedbox :)
2. To my weekly schedule followers: there won't be a 720p, 480p release. This took a long time to encode and i have real life stuff to attend to but if there is a huge request for it i guess i can do it.
I tried to be as honest as possible while writing this description. I know it's too long to read. If you read all of it, i thank you for your time :)
[shady release]: https://nyaa.iss.one/view/932413
[reaktor release]: https://nyaa.iss.one/view/1028184
[opus wiki]: https://wiki.xiph.org/Opus_Recommended_Settings
[opus compare]: https://opus-codec.org/comparison/
[psnr link]: https://en.wikipedia.org/wiki/Peak_signal-to-noise_ratio#:~:text=Peak%20signal%2Dto%2Dnoise%20ratio%20(PSNR)%20is%20an,the%20fidelity%20of%20its%20representation.
[ssim link]: https://en.wikipedia.org/wiki/Structural_similarity#:~:text=The%20structural%20similarity%20index%20measure,the%20similarity%20between%20two%20images.
[vmaf link]: https://en.wikipedia.org/wiki/Video_Multimethod_Assessment_Fusion
[super link]: https://en.wikipedia.org/wiki/Super-seeding