On 21 August 2015 at 18:04, Heinz Diehl <htd...@fritha.org> wrote: > Hi, > > F22, latest Firefox 40. With standard configuration, I can't play any > highres video on Youtube (720 or 1080p). When setting > > media.mediasource.enabled > media.mediasource.webm.enabled > > to "true" as recommended by the Mozilla Community, highres videos play > just fine. BUT some other videos now do not play any longer. In > particular, when setting > > media.mediasource.webm.enabled > > to "false", those non-working videos work again. But then, no highres > is possible. Example: > > https://www.youtube.com/watch?v=kFzN6j6FjJc
[...] IIUC, there're two different ways of not using adobe flash to play youtube videos: - The HTML5 player uses the gstreamer backend on the system - The HTML5 player uses the MSE (Media Source Extensions) stuff to check what's enabled on your setup go to youtube.com/html5. - If MSE can't work on your system either with webm/VP9 format or with the mp4/h264 format then it'll fallback to the HTML5 player with the gstreamer backend - With the gstreamer HMLT5 player not all resolutions are available, for example with the gstreamer backend I only get 360p and 720p, and nothing in between or over that range - I am not sure but I think that not all videos are available in both webm and h264 formats I am not sure what exactly is happening on your system, but I'd try enabling MSE with h264, make sure these are set to true: media.fragmented-mp4.enabled media.fragmented-mp4.exposed media.fragmented-mp4.ffmpeg.enabled media.mediasource.mp4.enabled that should make videos become available with more resolutions. -- Ahmad Samir
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