Am 01.10.2017 um 12:28 schrieb hw: > Roman Kennke <roman at kennke.org> writes: > >> Hello, >> >> I am trying to get MP4/H.264 playback in Firefox to work on my CentOS >> laptop (for vimeo). >> >> I installed the gstreamer plugins as described here: >> >> https://wiki.centos.org/TipsAndTricks/MultimediaOnCentOS7 >> >> (No, I did not install Flash, VLC and all the other stuff. I only want >> HTML5 MP4 playback..) >> >> I enabled the nux repos. I did install all available gstreamer >> plugins, i.e. -good -bad -ugly -ffmpeg etc. No success. >> >> Has anybody got mp4 playback working? >> >> Here's a test page: >> >> https://www.quirksmode.org/html5/tests/video.html > All movies on that page play without having taken any particular > precautions in Seamonkey (I dislike Firefox). > > However, I have ffmpeg and mplayer installed (compiled from source > because there aren´t packages for those). I don´t know if any of them > are being used by Seamonkey. > > > yum list installed | grep gstream > gstreamer.x86_64 0.10.36-7.el7 @base > gstreamer-plugins-base.x86_64 0.10.36-10.el7 @base > gstreamer-tools.x86_64 0.10.36-7.el7 @base > gstreamer1.x86_64 1.10.4-2.el7 @base > gstreamer1-plugins-base.x86_64 1.10.4-1.el7 @base > > > Those must have been installed for dependencies; I didn´t install them > explicitly. Installing ffmpeg-libs solved it for me. I suspect that FF links against ffmpeg-libs or via gstreamer-ffmpeg or some such. Thanks, Roman