stifle867

@stifle867@programming.dev

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Are movie and show file sizes more efficient than they were years ago?

This may be a stupid question, but I just got back into pirating some shows and movies and realize that many of the QxR files are much smaller than what I downloaded in the past. Is it likely that I am sacrificing a noticeable amount of quality if I replace my files with the smaller QxR ones?...

stifle867,

Also it’s common for anime to be encoded in 10-bit color rather than 8-bit which can also be used to encode files more efficiently.

stifle867, (edited )

I’m no expert either, this is just what I know from experience and through people smarter than me on the internet. I’ve put together some resources below for you. Apologies for the reddit links, it’s just where this content lives.

encoding 10bit reduces the amount of truncation errors during the encoding, which leads to a much smaller filesize despite the two additional bits. To the point where, despite it storing more information, there being less truncation errors offsets the filesize gain to the point where you get similar or even smaller sizes than 8bit encodes.

source: www.reddit.com/r/animepiracy/comments/…/grm8uq9/

…wordpress.com/…/why_does_10bit_save_bandwidth_-_…

reddit.com/…/ultimate_encoding_test_results_for_a…

stifle867,

My understanding is that HDR formats utilise 10-bit color formats rather than being strictly equivalent.

From Wikipedia:

HDR video refers to a video encoded in an HDR format. Thoses HDR video have a greater bit depth, luminance and color volume than standard dynamic range (SDR) video which uses a conventional gamma curve.

As it alludes, HDR is more than just a 10-bit color space. Encoding anime in 10-bit doesn’t take advantage of the greater luminance or dynamic range. It does take advantage of the color space to minimise banding.

stifle867,

Thank you to everyone who recommended soulseek! I’ve been looking for a platform that has hard to find, high-quality music and after a quick look at the software it looks very promising. I’ll report back if I’ve had any obscure songs I cannot find.

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