Hi, since I've (semi-)managed to sort out this issue of mine I'm reporting back on the off chance it'll help someone else.
In short, the issue was that dlopen() in NSPR's pr_LoadLibraryByPathname() couldn't see my libva*.so.1 libraries located in /opt/x/lib. Once I created a few symlinks to those from /usr/lib, the whole issue disappeared (first I tried setting LD_LIBRARY_PATH to /opt/x/lib before starting up FF but that didn't help - I wonder whether it should have or I'm missing something). The question of why it suddenly broke with FF57 remains (even though I have to admit that the /opt installed X has given me some troubles before so it's not really coming as that much of a surprise) but as long as there are no downsides to those few symlinks (comments are welcome on this), I guess I'm going to leave it at that. Thanks. Vaclav On Friday, November 17, 2017 09:26:51 AM Vaclav Masin wrote: Hello, as the title suggests - mp4 videos don't seem to play for me since FF 57. See this test site for an example: https://www.quirksmode.org/html5/tests/video.html - the other two videos play just fine but not the first one. Used to work in FF 56 and before without any issues. I get this message in the dev console: 'Specified “type” attribute of “video/mp4” is not supported. Load of media resource ../videos/big_buck_bunny.mp4 failed' or on some other sites messages like this: 'The video on this page can’t be played. Your system may not have the required video codecs for: video/mp4;codecs="avc1.4d400d mp4a.40.2" ... ...'. I tried upgrading to ffmpeg 3.4 as per the dev version of The BLFS Book, also a couple of the decoding libraries I could think of like libx264 and libx265 but so far no luck. My base system is LFS/BLFS 7.10 (with a touch of BLFS 7.9 to get the old KDE4 running but that's probably beyond the point). As I'm slowly running out of (my arguably a rather limited range of) ideas, would anyone have an idea what the problem might be? Thanks. Vaclav Masin
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