max compression at lower bitrates

[deadFreak]

Hi folks!

I'm practicing some anime x264 encoding, and i saw many releases from fansubs that their releases are ~140mb that they have max quality, so how i can compress ~140mb files at 1024x576 resolution in x264.

:thanks:

[martino]

Filter the encode well to remove noise, try not to sharpen it too much, since smoother video allows better compressibility and the "mean" step, take a look at the settings used in the h264 stream to get an idea about the settings used...

EDIT: Dup should help too.

[Dark Shikari]

The fansubs are likely very small because they are anime and H.264 is ideal for anime.

Use tons of reference frames, tons of b-frames, and so forth--this will help take advantage of that fact. Here's some sample (albeit pretty insane) options to start you off with:

--trellis 2 --me umh --bime --merange 64 --partitions all --8x8dct --subme 7 --bframes 16 --b-pyramid --ref 16 --b-rdo --mixed-refs --direct auto --weightb --progress --threads 4

If you're encoding your video from a DVD, I suggest you run a denoising filter such as FFT3D on it. Example AVS line:

degrainmedian(mode=3).fft3dfilter(bw=16, bh=16, ow=8, oh=8, bt=4, sigma=2.5, sigma2=3, sigma3=3.5, sigma4=3)

By combining very high x264 settings with strong denoising you can get very high quality videos in very small files.

Also make sure to use YATTA to properly inverse-telecine and deinterlace the input video. I'd suggest you check out the KickAssAnime forums--they have a number of threads dedicated to YATTA and similar preprocessing programs and can probably give you good advice.

[deadFreak]

i use the AE-MaxQuality, i think this can result, i test in "sola" 1280x720 raws to compress it in 175mb, and it has better results.

I don't know when i can get yatta on inet.

Examples of ~140mb releases are on a brazilian fansub called Anime no Sekai, there are very useful examples of max compression at lower bitrates.

Thanks

[Terranigma]

I don't know when i can get yatta on inet.

Yatta can be found Here (http://ivtc.org/).