[Cin] UPD: Re: Video background on CinGG website eats CPU ...

[Sam]

Thanks for all the clues.
For performance reasons I deactivated this effect video and replaced it 
with a simple image. I will try the previous effect elsewhere at a later 
time, with the right corrections. Currently the fast page loading is 
more important and a usable download page. With this change you should 
have no more problems with too high CPU usage.

Sam

On 02.11.19 15:47, Andrew Randrianasulu wrote:
> Well, I hope Sam will find this info useful (myself is not a dev for adding  this to webpage/locally):
>
> https://gist.github.com/cferdinandi/9044694
> "simple method to stop YouTube, Vimeo, and HTML5 videos from playing."
>
> https://gomakethings.com/stopping-youtube-vimeo-and-html5-videos-with-javascript/
> basically the same but without comments. sometimes comments useful .....
>
> /**
>     * Stop an iframe or HTML5 <video> from playing
>     * @param  {Element} element The element that contains the video
>     */
>    var stopVideo = function ( element ) {
>            var iframe = element.querySelector( 'iframe');
>            var video = element.querySelector( 'video' );
>            if ( iframe ) {
>                    var iframeSrc = iframe.src;
>                    iframe.src = iframeSrc;
>            }
>            if ( video ) {
>                    video.pause();
>            }
>    };
>
> --------------
>
> and further in comments
>
> ===========
>
> Copy link
>   Luminicus  commented Sep 23, 2019
> Good idea, but how can I call the function on click to pause all iframe > videos on the page (without ID of every iframe) ?
> @cferdinandi
>   Copy link
>   Owner  Author
>   cferdinandi  commented Sep 24, 2019
> @Luminicus This outta do it.
> /**
>   * Stop all iframes or HTML5 <video>'s from playing
>   */
> var stopVideos = function () {
>          var videos = document.querySelectorAll('iframe, video');
>          Array.prototype.forEach.call(videos, function (video) {
>                  if (video.tagName.toLowerCase() === 'video') {
>                          video.pause();
>                  } else {
>                          var src = video.src;
>                          video.src = src;
>                  }
>          });
> };
>
> ============
>
> but may be you already figured this out. I usually check git, not website itself :}
>
> ----------  Пересланное сообщение  ----------
>
> Тема: Re: [Cin] Video background on CinGG website eats CPU ...
> Дата: Пятница 01 ноября 2019
> Отправитель: Andrew Randrianasulu <randrianasulu at gmail.com>
> Получатель:  "Cinelerra.GG" <cin at lists.cinelerra-gg.org>
>
> В сообщении от Friday 01 November 2019 13:29:04 Andrea paz написал(а):
>> Your information and tests are always interesting, thanks also for the
>> link. I also noticed a great CPU usage watching the video of the site.
>> In total, with "top", we are around 90%, of which 30-40% of GPUs that
>> do not know what it means (I have enabled hardware acceleration in
>> Firefox).
> yes, I also have layers.acceleration.force-enabled enabled in Seamonkey, but this only accelerates in-browser compositing, IIRC
>
>> But I have the same results watching the same video on Youtube:
>> https://www.youtube.com/watch?v=SzP2o2OJ90g
>> And the same results from watching any video on Youtube.
>> Does it turn out to you too?
>
> Yeah, 200%+ of CPU according to top :}
>
> Video in avc1 (h264), so may be Chrome (and/or Firefox on windows?) actually use
> hw acceleration for *decoding* it, so effect not very notieceable ....
>
> https://bugzilla.mozilla.org/show_bug.cgi?id=1210727
>
> -------------------------------------------------------