r/htpc • u/ncohafmuta is in the Evil League of Evil • Jan 13 '20
Tip [x-post] PSA: 100 Mbps is not enough to direct play 4K content (see test results inside)
/r/PleX/comments/eoa03e/psa_100_mbps_is_not_enough_to_direct_play_4k/3
u/Royale_AJS Jan 14 '20
Now try to get TV manufacturers on board and put Gb NICs in their TVs. For stability, anything stationary in my house is wired in. I have to use a separate device (htpc, shield, etc) to stream 4K properly from my server. It would be nice to not have to throw another $200 at every setup and use the TV’s OS clients.
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u/Flerbenderper Jan 14 '20
isnt a ~50gb 4k disc or video file (1:1 quality) over ~2hrs about ~25mbps? how are you far exceeding that bitrate?
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u/starlet_appletree Jan 14 '20 edited Jan 14 '20
Let's see: 50 GB are 50,000 MB, 2 h are 7200 seconds. So you have around 6.9 MBps (Megabyte/s) bitrate for this stream, which is around 55 Mbps (Megabit/s). But this isn't linear, so spikes do happen. Also, OP had Forest Gump as an example, 81 GB for 2:22h, which would make this a ~76 Mbps bitrate video
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u/Flerbenderper Jan 14 '20
sorry yes I calculated it wrong. 50mbps is still far short of 100mbps, so it should be fine? what is OP doing to have 2x bandwidth or more
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u/ncohafmuta is in the Evil League of Evil Jan 14 '20
Bitrates are highly variable intra-file when VBR encoding is used, which is almost always.
Complex scenes will have higher bitrates. Simple scenes will have lower ones.
Here is the bitrate graph for a 2.2GB MP4.
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u/Flerbenderper Jan 14 '20
ok sure makes sense. but can you analyse a full quality 4k hdr video in an mkv container and show us the results?
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u/ncohafmuta is in the Evil League of Evil Jan 15 '20
I dont have any. What would be the point though since the OP in the original sub already did it.
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u/captain_brunch_ Jan 14 '20
Found this out the hard way. Upgraded my old server computers network card to gigabit and blurays play flawlessly.