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igorlogius ,
@igorlogius@lemmy.world avatar

not sure , but maybe it is media codec/encoding related?

You could maybe try addons.mozilla.org/en-US/…/enhanced-h264ify/ to check.

azureVM1 OP ,

It's not, because my CPU supports VP9 hardware decoding.

garam ,
@garam@lemmy.my.id avatar

By anychance, do you have free ram? Sometimes this happen when the ram is not available… so yeah… You should check it first. Also check about:memory I guess

azureVM1 OP ,

Yes

garam ,
@garam@lemmy.my.id avatar

Is the about:cache is full? Or it’s too small? I mean if it’s to small it could be the cause.

azureVM1 OP ,

I didn't know about that. It does seem small. It's just 32 MB. So I googled around and

http://kb.mozillazine.org/Browser.cache.memory.capacity

https://tweakguides.pcgamingwiki.com/Firefox_10.html

changed browser.cache.memory.capacity value from -1 to 1000000 and changed media.cache_readahead_limit / media.cache_resume_threshold to 999999 but I didn't notice any difference. Rebuffering still happens.

What I did notice was that after hitting the replay button, if I press right arrow quickly enough to skip forward (40% or more), the buffer reppears and my network activity reflects that.

So it seems to me is that Firefox caches about 60% of the video (latter half) and when you replay it, it starts rebuffering the lost 40% of the first half of the video. I reverted my settings back to default values (the 3 prefs I mentioned above) and it still behaves this way.

garam ,
@garam@lemmy.my.id avatar

ugh, I’m out of idea tbh. Seems you need to ask others about it. Also are your video in 2k or probably 4k? or it’s normal 1080 or even only 720?

azureVM1 OP ,

Same. I even came across this comment after doing that. Did everything it said (browser.cache.offline.enable perf wasn't there for some reason, so I made one) and still no change. Changed the values of perfs mentioned in my post again as well, combined with that comment's proposed changes but still nothing.

And yeah, it's 1440p but I've tested this on 1080p videos as well. Length of 1440p video is 2-3 mins and the 1080p one is just over 11 mins.

Honestly, I give up at this point. Btw, thank you so much for trying to help.

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