Lyfesaver 133 Posted October 7, 2020 Posted October 7, 2020 Feel free to point out how I am thinking wrong about this, as I feel I absolutely must have some bad logic/understanding on my part. Lowest 4K option to receive from server 40Mbps so I am assuming (mistake #1 I am sure) 40Mbps is the lowest the server can send out, yet the max a Roku can receive is 25Mbps, leaving me without the ability to stream to remote Rokus in 4K with any watchable quality. Very clean gigabit internet line, both server and recipient on same network node even (I know that even being next door means nothing really, but still...). Server to PC running Emby web, still not watchable but MUCH better. Server to Emby Theater on a PC... perfection and even direct playing.
Luke 42078 Posted October 7, 2020 Posted October 7, 2020 Hi, where did you get that number as the max that a Roku can handle?
Lyfesaver 133 Posted October 7, 2020 Author Posted October 7, 2020 https://developer.roku.com/docs/specs/media/streaming-specifications.md
ebr 16176 Posted October 7, 2020 Posted October 7, 2020 I believe the published limits are 25 for h264 and 30 for HEVC. 4K content can exist below these limits as well.
speechles 2055 Posted October 7, 2020 Posted October 7, 2020 (edited) Roku has never updated those specifications. The newer chipsets afford much faster processing. See here: https://en.wikipedia.org/wiki/Roku Disregard anything you see in those developer media streaming specifications as they are related to streaming over USB. When streaming over ethernet/wifi the speeds can be much higher. The USB port on the Roku is going to top out around 60Mb/sec (USB 2.0). Theoretically a safe value for this is 40Mb/sec. This is where Roku designs the limit. It is not in relation to streaming where the limit has a much higher threshold. You should be able to stream at 110Mb/sec using AC WiFi. Edited October 7, 2020 by speechles
Lyfesaver 133 Posted October 7, 2020 Author Posted October 7, 2020 Okay, so what (best guesses are okay) would you think the situation is? Roku/RokuTV/Web constant buffering. ET on a PC, perfection.
Happy2Play 9780 Posted October 7, 2020 Posted October 7, 2020 50 minutes ago, Lyfesaver said: It contradicts itself also. Videos can be encoded using H.264, HEVC (H.265), or VP9 codecs. AVC (H.264) HEVC (H.265)1 VP91 Aspect Ratio 22 Various Various Various Dimension Various up to 1920x1080 Various up to 3840x2160 Various up to 3840x2160 Input Frame Rate3 24p, 25p, 30p, 50p, 60p 24p, 25p, 30p, 50p, 60p 24p, 25p, 30p, 60p5 Color Space Rec.709 Rec.709, Rec.2020 Rec.709, Rec.2020 Profile main, high main, main 10 profile 0, profile 2 Level 4.1, 4.2 4.1, 5.0, 5.1 Video Mode Constrained VBR Constrained VBR Constrained VBR Video Bitrate Up to 10Mbps Up to 40Mbps Up to 40Mbps Peak Video Bit rate 1.5x average 1.5x average 1.5x average Key Frame Interval 4 < 10s < 10s < 10s HDR support Dolby Vision: dvav.09 Dolby Vision: dvhe.05 HDR10 (HEVC profile Main 10) HLG HDR10
Happy2Play 9780 Posted October 7, 2020 Posted October 7, 2020 3 minutes ago, Lyfesaver said: Okay, so what (best guesses are okay) would you think the situation is? Roku/RokuTV/Web constant buffering. ET on a PC, perfection. Need more context, are they all playing the media the same? But would guess the Roku/RokuTV are not gigabit either.
Lyfesaver 133 Posted October 7, 2020 Author Posted October 7, 2020 Yes, same media, same server, same PC for web and ET also same Roku for app and tried Roku web browser too (I think, 50/50 on that). I am happy to give as much context as needed. Also to run tests and get data if need be. Thank you, for any help.
speechles 2055 Posted October 7, 2020 Posted October 7, 2020 (edited) 14 minutes ago, Lyfesaver said: Okay, so what (best guesses are okay) would you think the situation is? Roku/RokuTV/Web constant buffering. ET on a PC, perfection. Lets start with an example that I can reproduce. I have a Roku TV model 7130X. What do the stats for nerds in the Roku app look like can you show us a picture? How big is the file? I can try the same thing on my Roku TV and see if it throws the same hissy fit. If you remux it with MKVToolNix GUI does it fix the problem? Maybe it has to do with the header. The Roku is crippled by its dependency of using the header for format detection. So you can confuse it when things inside do not match what it expects from the header. You can fix this usually with a simple remux copying all streams. If this is the issue this alone solves it. Let us know if this isn't the issue and share a picture of the stats for nerds and possibly a link to the file. We are always eager to chase playback issues and solve them. Curious as the cat that ate the mouse. We are ready for another mouse. Meow! ^_~ Should look similar to this.. Edited October 7, 2020 by speechles
Lyfesaver 133 Posted October 9, 2020 Author Posted October 9, 2020 Did not forget about this, just have not had time to tinker. Hopefully this weekend I can get some feedback for y'all.
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