Produced | Open Source China
Director of the | Of Culture
Bilibili (hereinafter referred to as "Station B") today responded to users' reports that they forced HEVC playback on the Web.
Station B indicates that heVC is not enforced on the web side, and only if the device meets certain performance will it turn on high-definition HEVC decoding above 1080P, and it will also be downgraded to AVC decoding when it detects that the device performance causes playback problems.
Station B also indicates that heVC encoding does save bandwidth, but it is not used to save bandwidth.
The origin of the event is that netizens posted on Weibo that in order to save bandwidth, Station B forcibly opened HEVC playback on the Web side and used 8 WASM Workers to run software decoding, resulting in a large number of computer CPUs when playing high bitrate 1080P video.
HEVC (abbreviation for High Efficiency Video Coding) is a new video compression standard that expands on the H.264/AVC encoding standard and is the successor to H.264/MPEG-4 AVC. HEVC is believed to not only improve image quality, but also achieve twice the compression ratio of H.264/MPEG-4 AVC (equivalent to a 50% reduction in bit rate at the same picture quality), and can support 4K resolution and even ultra-high-quality TVs, with a maximum resolution of 8192×4320 (8K resolution). On January 26, 2013, HEVC officially became an international standard.