On Monday 11 Jan 2016 20:10:53 Stroller wrote: > > On Mon, 11 January 2016, at 6:48 p.m., waltd...@waltdnes.org wrote: > > The other problem is that HTML5 sucks up more CPU for video. My data > > > > point with an ancient underpowered Atom netbook watching a Youtube music > > video https://www.youtube.com/watch?v=cwqhdRs4jyA > > > > Flash > > ===== > > 1) Regular (i.e. smallest) display plays OK > > 2) Wide format display plays OK > > 3) Fullscreen audio OK, but video stutters badly > > > > HTML5 > > ===== > > 1) Regular (i.e. smallest) display plays OK > > 2) Wide format audio OK, but video stutters badly > > 3) Fullscreen; you don't really want to know > > That must be the codec or the resolution or something, surely? > > Or possibly the way your browser implements things. > > My understanding is that Flash™ is a compiled bytecode. So any video player > written in Flash has to go through an extra step of translation, at > runtime, for its instructions to be translated into native code. > > I believe different plugins may be written with different security > frameworks - giving a plugin permission to talk directly to the GPU has > more serious implications than the browser taking a 480x360 video stream > and drawing it in the window itself. And one of those (the latter, I > think?) will have more processing overhead, too. > > But I find it hard to believe that Flash it's generally more efficient to > run Flash programs than native ones. > > Note that the video you refer to is available in two different formats at > its best resolution - vp8 and avc1: > > $ youtube-dl https://www.youtube.com/watch?v=cwqhdRs4jyA -F > … > 43 webm 640x360 medium , vorbis, vp8.0 > 18 mp4 640x360 medium , mp4a.40.2, avc1.42001E > (best) $ > > Undoubtedly one of these codecs is a bit more efficient than the other. > > Stroller.
I tried to play it with a default profile and the flash plugin disabled. This is the stream that right-click/stats for nerds shows: Video ID: cwqhdRs4jyA Dimensions: 640 x 480 Resolution: 480 x 360 Volume:100% Stream Host: Stream Type: https CPN: CRD2ZLDNKPRMg_WO Mime Type: video/webm; codecs="vp8.0, vorbis" DASH: no (43) BTW, there's nothing wrong with the audio. -- Regards, Mick
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