{"id":75970,"date":"2020-03-30T01:42:37","date_gmt":"2020-03-29T23:42:37","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/oblachnye-igry-stress-test-5-oblachnyh-igrovyh-servisov-plohim-internetom"},"modified":"2020-03-30T01:42:37","modified_gmt":"2020-03-29T23:42:37","slug":"oblachnye-igry-stress-test-5-oblachnyh-igrovyh-servisov-plohim-internetom","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/oblachnye-igry-stress-test-5-oblachnyh-igrovyh-servisov-plohim-internetom","title":{"rendered":"Cloud gaming: stress test of 5 cloud gaming services with poor internet","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\"Cloud
\n
\nAbout a year ago, I published an article \"Cloud gaming: assessing the capabilities of services for playing on weak PCs from firsthand experience\"<\/a><\/noindex>. In it, the pros and cons of different cloud gaming services for weak PCs were analyzed. I tested each service during gameplay and shared my overall impressions.<\/p>\n

In the comments to that and other similar articles, readers often shared their experiences with various gaming services. There were often opposing opinions about the same service. For some, everything was perfect, while others couldn't play due to lags and freezes. This made me think about assessing the quality of these services under different conditions \u2014 from ideal to terrible. It's all about network quality since users can't always boast about having fast and trouble-free connections, right? So, below we will evaluate the services by simulating different levels of network performance.
\n<\/a><\/noindex><\/p>\n

What's the problem, anyway?<\/h3>\n

\nAs mentioned above \u2014 it\u2019s about the quality of the connection. More precisely \u2014 it\u2019s about packet loss during gameplay. The higher the losses, the more problems gamers face, and the less satisfied they are with the game. Rarely does someone have a perfect connection, like fiber optics directly to their device, especially not shared among all the residents of an apartment building.<\/p>\n

For reference \u2014 at a connection speed of 25 Mbps, transmitting 1 frame requires 40-50 data packets. The more packets are lost, the poorer the quality of the picture becomes, and the more noticeable the lags and freezes. In especially difficult cases, it becomes just impossible to play.<\/p>\n

Naturally, the cloud service itself cannot influence the user\u2019s bandwidth and stability (though that would be great, of course). However, different ways of mitigating connection issues can be anticipated. Which services handle the problem best \u2014 we will see below.<\/p>\n

What are we comparing?<\/h3>\n

\nA regular PC (Intel i3-8100, GTX 1060 6 GB, 8GB RAM), GeForce Now (its Russian version GFN<\/a><\/noindex> with servers in Moscow), Loudplay<\/a><\/noindex>, Vortex<\/a><\/noindex>, Playkey<\/a><\/noindex>, Stadia<\/a><\/noindex>. On all services except Stadia, we study the quality of gameplay in \"The Witcher\". At the time of writing this article, Google Stadia did not have this game, so I had to test another one \u2014 \"Odyssey\". <\/p>\n

What are the conditions and methodology for testing?<\/h3>\n

\nTestujeme z Moskvy. Poskytovatel - MGTs, tarif 500 Mbit\/s, p\u0159ipojen\u00ed kabelov\u00e9, ne WiFi. Nastaven\u00ed kvality grafiky v slu\u017eb\u00e1ch bereme jako v\u00fdchoz\u00ed, rozli\u0161en\u00ed - FullHD. <\/p>\n

Pomoc\u00ed programu Clumsy<\/a><\/noindex> modelujeme probl\u00e9my se s\u00edt\u00ed, konkr\u00e9tn\u011b ztr\u00e1ty paket\u016f r\u016fzn\u00fdch typ\u016f a objem\u016f. <\/p>\n

Rovnom\u011brn\u00e9 jednor\u00e1zov\u00e9 ztr\u00e1ty. <\/b>To je situace, kdy se ztrat\u00ed pouze 1 paket a ztr\u00e1ty jsou rozlo\u017eeny v\u00edce-m\u00e9n\u011b rovnom\u011brn\u011b. Tak\u017ee rovnom\u011brn\u00e9 ztr\u00e1ty 10 % znamenaj\u00ed, \u017ee z 100 paket\u016f se ka\u017ed\u00fd 10. ztrat\u00ed, ale v\u017edy pouze jeden paket. Probl\u00e9m se obvykle projevuje p\u0159i deformac\u00edch (st\u00edn\u011bn\u00ed) na kan\u00e1lu od klienta k serveru. <\/p>\n

Testujeme rovnom\u011brn\u00e9 ztr\u00e1ty 5 %, 10 %, 25 %.<\/p>\n

Nerovnom\u011brn\u00e9 masov\u00e9 ztr\u00e1ty<\/b>, kdy\u017e v ur\u010dit\u00fd moment najednou ztrat\u00edme 40-70 paket\u016f za sebou. Tyto ztr\u00e1ty se nej\u010dast\u011bji vyskytuj\u00ed p\u0159i probl\u00e9mech s s\u00ed\u0165ov\u00fdmi za\u0159\u00edzen\u00edmi (routery apod.) u u\u017eivatele nebo u poskytovatele. Mohou b\u00fdt spojeny s p\u0159ete\u010den\u00edm vyrovn\u00e1vac\u00ed pam\u011bti s\u00ed\u0165ov\u00e9ho za\u0159\u00edzen\u00ed na lince \u201eu\u017eivatel - server\u201c. WiFi s tlust\u00fdmi zdmi rovn\u011b\u017e m\u016f\u017ee zp\u016fsobit takov\u00e9 ztr\u00e1ty. Zat\u00ed\u017een\u00ed bezdr\u00e1tov\u00e9 s\u00edt\u011b v d\u016fsledku velk\u00e9ho mno\u017estv\u00ed za\u0159\u00edzen\u00ed - to je dal\u0161\u00ed p\u0159\u00ed\u010dina, velmi typick\u00e1 pro kancel\u00e1\u0159e a v\u00edcepodla\u017en\u00ed domy.<\/p>\n

Testujeme nerovnom\u011brn\u00e9 ztr\u00e1ty 0,01 %, 0,1 %, 0,5 %.<\/p>\n

N\u00ed\u017ee analyzuji v\u0161echny tyto p\u0159\u00edpady a p\u0159ikl\u00e1d\u00e1m videomateri\u00e1ly pro n\u00e1zornost. Na konci \u010dl\u00e1nku tak\u00e9 poskytuji odkaz na surov\u00e1, nesest\u0159\u00edhan\u00e1 videa z hran\u00ed ze v\u0161ech slu\u017eeb a p\u0159\u00edpad\u016f - tam je mo\u017en\u00e9 podrobn\u011bji prozkoumat artefakty a technick\u00e9 informace (ve v\u0161ech slu\u017eb\u00e1ch krom\u011b Stadia jsou zaznamen\u00e1na data technick\u00e9 konzole; u Stadia jsem takov\u00e9 informace nena\u0161la). <\/p>\n

Za\u010d\u00edn\u00e1me!<\/h3>\n

\nN\u00ed\u017ee je 7 sc\u00e9n\u00e1\u0159\u016f z\u00e1t\u011b\u017eov\u00e9ho testu a video s \u010dasov\u00fdmi raz\u00edtky (video je stejn\u00e9, pro pohodl\u00ed se v ka\u017ed\u00e9m bod\u011b spou\u0161t\u00ed od pot\u0159ebn\u00e9ho okam\u017eiku). Na konci p\u0159\u00edsp\u011bvku jsou p\u016fvodn\u00ed videa pro ka\u017edou ze slu\u017eeb. Video mi pomohl vytvo\u0159it dobr\u00fd zn\u00e1m\u00fd, za co\u017e mu d\u011bkuji!<\/p>\n

Sc\u00e9n\u00e1\u0159 \u010d. 1. Ide\u00e1ln\u00ed podm\u00ednky. Nulov\u00e9 ztr\u00e1ty v s\u00edti<\/h4>\n

\nV\u0161e, jak m\u00e1 b\u00fdt v ide\u00e1ln\u00edm sv\u011bt\u011b. Nen\u00ed \u017e\u00e1dn\u00fd probl\u00e9m s p\u0159ipojen\u00edm, \u017e\u00e1dn\u00e9 v\u00fdpadky, \u017e\u00e1dn\u00e9 ru\u0161en\u00ed, va\u0161e access point je maj\u00e1kem internetu. V t\u011bchto sklen\u00edc\u00edch se t\u00e9m\u011b\u0159 v\u0161ichni \u00fa\u010dastn\u00edci testov\u00e1n\u00ed ukazuj\u00ed jako d\u016fstojn\u00ed.<\/p>\n

\r\n \"P\u0159ehr\u00e1t\r\n
<\/div>\r\n <\/div><\/center>
\nPC<\/b><\/p>\n

Do ka\u017ed\u00e9ho sc\u00e9n\u00e1\u0159e jsme vzali z\u00e1b\u011bry z PC hry jako m\u011b\u0159\u00edtko. Je jasn\u00e9, \u017ee na n\u011bj kvalita s\u00edt\u011b nem\u00e1 \u017e\u00e1dn\u00fd vliv, hra se spou\u0161t\u00ed na PC lok\u00e1ln\u011b. P\u0159\u00edtomnost t\u011bchto z\u00e1b\u011br\u016f odpov\u00edd\u00e1 na ot\u00e1zku \"jestli je zn\u00e1t rozd\u00edl p\u0159i hran\u00ed v cloudu ve srovn\u00e1n\u00ed s hran\u00edm na vlastn\u00edm PC\". Za ide\u00e1ln\u00edch podm\u00ednek v na\u0161em p\u0159\u00edpad\u011b \u2014 v\u011bt\u0161ina slu\u017eeb \u017e\u00e1dn\u00fd rozd\u00edl nec\u00edt\u00ed. N\u00ed\u017ee u\u017e o PC nic ps\u00e1t nebudeme, prost\u011b si zapamatujte, \u017ee existuje.<\/p>\n

GeForce Now<\/b><\/p>\n

V\u0161echno je v po\u0159\u00e1dku, obraz je ostr\u00fd, proces prob\u00edh\u00e1 hladce, bez ztr\u00e1t sn\u00edmk\u016f. <\/p>\n

Vortex<\/b><\/p>\n

Tady Vortex kaz\u00ed n\u00e1\u0161 ide\u00e1ln\u00ed sv\u011bt. Hned za\u010dal m\u00edt probl\u00e9my \u2014 obraz byl hor\u0161\u00ed ne\u017e u ostatn\u00edch, plus jsou dob\u0159e viditeln\u00e9 \"zpo\u017ed\u011bn\u00ed\". Mo\u017en\u00fd probl\u00e9m je, \u017ee hern\u00ed servery se nach\u00e1z\u00ed daleko od Moskvy a hardware na hern\u00edch serverech se zd\u00e1 slab\u0161\u00ed a FullHD \u0161patn\u011b zvl\u00e1d\u00e1. Ve v\u0161ech testech se Vortex uk\u00e1zal \u0161patn\u011b. Pokud m\u00e1 n\u011bkdo pozitivn\u00ed zku\u0161enost s hran\u00edm na Vortex \u2014 napi\u0161te do koment\u00e1\u0159\u016f, pod\u011blte se, odkud jste hr\u00e1li a jak to dopadlo.<\/p>\n

Playkey<\/b><\/p>\n

V\u0161echno skv\u011bl\u00e9, p\u0159esn\u011b jako na lok\u00e1ln\u00edm PC. Viditeln\u00e9 probl\u00e9my jako zpo\u017ed\u011bn\u00ed nebo lagy nejsou.<\/p>\n

Loudplay<\/b><\/p>\n

Slu\u017eba nab\u00edz\u00ed vynikaj\u00edc\u00ed obraz, viditeln\u00e9 probl\u00e9my nejsou.<\/p>\n

Stadia<\/b><\/p>\n

Hern\u00ed slu\u017eba od Google funguje skv\u011ble, i kdy\u017e nem\u00e1 servery v RF, a vlastn\u011b ofici\u00e1ln\u011b Stadia v Rusku nefunguje. P\u0159esto je v\u0161echno v po\u0159\u00e1dku. Bohu\u017eel bylo \u0161koda, \u017ee \"Zakl\u00edna\u010d\" na Stadia nebyl v dob\u011b hran\u00ed, ale co se d\u00e1 d\u011blat, vzali jsme \"Odysseu\" \u2014 tak\u00e9 n\u00e1ro\u010dn\u00e9, taky o mu\u017ei, kter\u00fd sek\u00e1 lidi a zv\u00ed\u0159ata. <\/p>\n

Sc\u00e9n\u00e1\u0159 \u010d. 2. Rovnom\u011brn\u00e9 ztr\u00e1ty 5%<\/h4>\n

\nV tomto testu z 100 paket\u016f se ztrat\u00ed p\u0159ibli\u017en\u011b ka\u017ed\u00fd 20. P\u0159ipom\u00edn\u00e1m, \u017ee pro vykreslen\u00ed jednoho sn\u00edmku je pot\u0159eba 40-50 paket\u016f.<\/p>\n

\r\n \"P\u0159ehr\u00e1t\r\n
<\/div>\r\n <\/div><\/center>
\nGeForce Now<\/b><\/p>\n

U slu\u017eby od Nvidie je v\u0161e v po\u0159\u00e1dku, probl\u00e9my nejsou. Obraz je o n\u011bco rozmazan\u011bj\u0161\u00ed ne\u017e u Playkey, ale \"Zakl\u00edna\u010d\" je st\u00e1le hrateln\u00fd.<\/p>\n

Vortex<\/b><\/p>\n

Tady se v\u0161echno zhor\u0161ilo je\u0161t\u011b v\u00edc. Pro\u010d \u2014 nen\u00ed \u00fapln\u011b jasn\u00e9, pravd\u011bpodobn\u011b nen\u00ed zaji\u0161t\u011bna redundantnost nebo je minim\u00e1ln\u00ed. Redundantnost je odoln\u00e9 k\u00f3dov\u00e1n\u00ed p\u0159en\u00e1\u0161en\u00fdch dat (FEC \u2014 Forward Error Correction). Tato technologie obnovuje data p\u0159i \u010d\u00e1ste\u010dn\u00e9 ztr\u00e1t\u011b kv\u016fli probl\u00e9m\u016fm v s\u00edti. Implementovat a nastavit ji lze r\u016fzn\u00fdmi zp\u016fsoby a soud\u011b podle v\u00fdsledk\u016f tv\u016frci Vortex v tom neusp\u011bli. I p\u0159i minim\u00e1ln\u00edch rovnom\u011brn\u00fdch ztr\u00e1t\u00e1ch se hr\u00e1t ned\u00e1. B\u011bhem dal\u0161\u00edch test\u016f Vortex jednodu\u0161e \"zcvakl\".<\/p>\n

Playkey<\/b><\/p>\n

V\u0161echno je v po\u0159\u00e1dku, nen\u00ed zde \u017e\u00e1dn\u00fd v\u00fdrazn\u00fd rozd\u00edl s ide\u00e1ln\u00edmi podm\u00ednkami. Mo\u017en\u00e1 pom\u00e1h\u00e1 to, \u017ee servery spole\u010dnosti jsou um\u00edst\u011bny tak\u00e9 v Moskv\u011b, odkud byly testy prov\u00e1d\u011bny. A mo\u017en\u00e1 je tak\u00e9 l\u00e9pe nastaven\u00e1 zm\u00edn\u011bn\u00e1 redundantnost. <\/p>\n

Loudplay<\/b><\/p>\n

Slu\u017eba se n\u00e1hle stala nehratelnou, i p\u0159es relativn\u011b mal\u00e9 ztr\u00e1ty paket\u016f. V \u010dem by mohl b\u00fdt probl\u00e9m? P\u0159edpokl\u00e1d\u00e1m, \u017ee Loudplay funguje na TCP protokolu. V takov\u00e9m p\u0159\u00edpad\u011b, dokud nen\u00ed potvrzen\u00ed o doru\u010den\u00ed paketu, dal\u0161\u00ed pakety nejsou odes\u00edl\u00e1ny, syst\u00e9m \u010dek\u00e1 na potvrzen\u00ed o dod\u00e1n\u00ed. Pokud paket zmizel, nebude potvrzen\u00ed o jeho dod\u00e1n\u00ed, nov\u00e9 pakety se neode\u0161lou, obraz se zastav\u00ed, konec p\u0159\u00edb\u011bhu. <\/p>\n

Pokud by se pou\u017eil UDP, potvrzen\u00ed o p\u0159ijet\u00ed paketu by nebylo pot\u0159eba. Jak se zd\u00e1, v\u0161echny ostatn\u00ed slu\u017eby, krom\u011b Loudplay, pou\u017e\u00edvaj\u00ed protokol UDP. Pokud tomu tak nen\u00ed, pros\u00edm, opravte m\u011b v koment\u00e1\u0159\u00edch.<\/p>\n

Stadia<\/b><\/p>\n

V\u0161echno je hrateln\u00e9. N\u011bkdy se obraz pixelizuje, doch\u00e1z\u00ed k minim\u00e1ln\u00edm odezv\u00e1m. Mo\u017en\u00e1 nen\u00ed zcela ide\u00e1ln\u011b zpracov\u00e1na odolnost proti poruch\u00e1m, a proto se p\u0159i celkov\u011b hrateln\u00e9m toku objevuj\u00ed drobn\u00e9 artefakty.<\/p>\n

Sc\u00e9n\u00e1\u0159 \u010d. 3. Rovnom\u011brn\u00e9 ztr\u00e1ty 10%<\/h4>\n

\nZtr\u00e1c\u00edme ka\u017ed\u00fd des\u00e1t\u00fd paket na sto. To u\u017e je v\u00fdzvou pro slu\u017eby. Aby se s takov\u00fdmi ztr\u00e1tami efektivn\u011b vypo\u0159\u00e1daly, pot\u0159ebuj\u00ed technologii pro obnovu a\/nebo opakovan\u00e9 odesl\u00e1n\u00ed ztracen\u00fdch dat.<\/p>\n

\r\n \"P\u0159ehr\u00e1t\r\n
<\/div>\r\n <\/div><\/center>
\nGeForce Now<\/b><\/p>\n

U Geforce se objevuj\u00ed mal\u00e9 v\u00fdkyvy v kvalit\u011b video toku. Jak se zd\u00e1, GFN reaguje na probl\u00e9my v s\u00edti, sna\u017e\u00ed se je minimalizovat. Slu\u017eba sni\u017euje bitrate, tedy mno\u017estv\u00ed bit\u016f pro p\u0159enos dat. Tak se sna\u017e\u00ed sn\u00ed\u017eit z\u00e1t\u011b\u017e na pro n\u011bj nedostate\u010dn\u011b kvalitn\u00ed s\u00ed\u0165 a udr\u017eet stabiln\u00ed spojen\u00ed. A co se stability t\u00fd\u010de, tam \u017e\u00e1dn\u00e9 ot\u00e1zky nejsou, ale kvalita videa trp\u00ed znateln\u011b. Vid\u00edme v\u00fdraznou pixelizaci obrazu. A proto\u017ee simulace p\u0159edpokl\u00e1d\u00e1 neust\u00e1lou ztr\u00e1tu 10% paket\u016f, sni\u017eov\u00e1n\u00ed bitrate p\u0159\u00edli\u0161 nepom\u00e1h\u00e1, situace se nevrac\u00ed k norm\u00e1lu. <\/p>\n

Ve skute\u010dn\u00e9m \u017eivot\u011b bude obraz pravd\u011bpodobn\u011b nestabiln\u011b \u0161patn\u00fd, ale prom\u011bnliv\u00fd. Ztr\u00e1ty se zv\u00fd\u0161ily \u2013 obraz se rozmazal; ztr\u00e1ty klesly \u2013 obraz se vr\u00e1til do norm\u00e1lu a tak d\u00e1le. Hern\u00edmu z\u00e1\u017eitku to rozhodn\u011b neprosp\u00edv\u00e1. <\/p>\n

Playkey<\/b><\/p>\n

\u017d\u00e1dn\u00e9 v\u00e1\u017en\u00e9 probl\u00e9my nejsou. Pravd\u011bpodobn\u011b algoritmus detekuje probl\u00e9my v s\u00edti, ur\u010duje m\u00edru ztr\u00e1t a v\u00edce se zam\u011b\u0159uje na redundantnost ne\u017e na sni\u017eov\u00e1n\u00ed bitratu. P\u0159i 10% rovnom\u011brn\u00fdch ztr\u00e1t z\u016fst\u00e1v\u00e1 kvalita obr\u00e1zku prakticky nezm\u011bn\u011bna, u\u017eivatel tyto ztr\u00e1ty pravd\u011bpodobn\u011b ani nezaregistruje.<\/p>\n

Loudplay<\/b><\/p>\n

Nefunguje, prost\u011b se nespustil. P\u0159i dal\u0161\u00edch testech se situace opakovala. Jak se d\u00e1 soudit, tato slu\u017eba se nijak nep\u0159izp\u016fsobuje probl\u00e9m\u016fm v s\u00edti. Mo\u017en\u00e1 za to m\u016f\u017ee TCP protokol. Nepatrn\u00e9 ztr\u00e1ty \u00fapln\u011b paralyzuj\u00ed slu\u017ebu. Nen\u00ed to p\u0159\u00edli\u0161 praktick\u00e9 pro b\u011b\u017en\u00fd \u017eivot, samoz\u0159ejm\u011b.<\/p>\n

Vortex<\/b><\/p>\n

Tak\u00e9 velk\u00e9 probl\u00e9my. Nen\u00ed mo\u017en\u00e9 hr\u00e1t v takov\u00fdch podm\u00ednk\u00e1ch, i kdy\u017e obraz je\u0161t\u011b existuje a postava pokra\u010duje v b\u011bhu, pravda, trhan\u011b. Mysl\u00edm, \u017ee probl\u00e9m je op\u011bt v \u0161patn\u011b implementovan\u00e9 nebo neexistuj\u00edc\u00ed redundantnosti. Pakety se \u010dasto ztr\u00e1cej\u00ed a nijak se neobnovuj\u00ed. V d\u016fsledku toho kvalita obrazu degraduje na nehratelnou \u00farove\u0148.<\/p>\n

Stadia<\/b><\/p>\n

Bohu\u017eel, zde je to \u0161patn\u00e9. Doch\u00e1z\u00ed k p\u0159eru\u0161en\u00ed toku, tak\u017ee se ud\u00e1losti na obrazovce odehr\u00e1vaj\u00ed trhan\u011b, hran\u00ed je extr\u00e9mn\u011b obt\u00ed\u017en\u00e9. Lze p\u0159edpokl\u00e1dat, \u017ee probl\u00e9m vznikl, stejn\u011b jako v p\u0159\u00edpad\u011b Vortexu, z minim\u00e1ln\u00ed redundantnosti nebo jej\u00ed absence. Konzultovala jsem to s n\u011bkolika zn\u00e1m\u00fdmi, kte\u0159\u00ed se v t\u00e9matu orientuj\u00ed, a ti tvrdili, \u017ee Stadia pravd\u011bpodobn\u011b \u010dek\u00e1 na kompletn\u00ed sestaven\u00ed sn\u00edmku. Na rozd\u00edl od GFN se sna\u017e\u00ed situaci nezachra\u0148ovat celkov\u00fdm sn\u00ed\u017een\u00edm bitratu. V\u00fdsledkem nen\u00ed \u017e\u00e1dn\u00e9 artefakty, ale objevuj\u00ed se trh\u00e1n\u00ed a zpo\u017ed\u011bn\u00ed (u GFN je naopak m\u00e9n\u011b trh\u00e1n\u00ed\/zpo\u017ed\u011bn\u00ed, ale kv\u016fli n\u00edzk\u00e9mu bitratu je obraz zcela neatraktivn\u00ed). <\/p>\n

Ostatn\u00ed slu\u017eby se tak\u00e9 zdaj\u00ed ne\u010dekat na \u00fapln\u00e9 sestaven\u00ed sn\u00edmku, nahrazuj\u00ed ztracenou \u010d\u00e1st fragmentem star\u00e9ho sn\u00edmku. To je dobr\u00e9 \u0159e\u0161en\u00ed, ve v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f u\u017eivatel nepozn\u00e1 \u017e\u00e1dn\u00fd podvod (za sekundu se vym\u011bn\u00ed 30+ sn\u00edmk\u016f), i kdy\u017e ob\u010das mohou vznikat artefakty.<\/p>\n

Sc\u00e9n\u00e1\u0159 \u010d. 4. Rovnom\u011brn\u00e9 ztr\u00e1ty 25%<\/h4>\n

\nKa\u017ed\u00fd \u010dtvrt\u00fd paket se ztr\u00e1c\u00ed. St\u00e1v\u00e1 se to st\u00e1le stra\u0161n\u011bj\u0161\u00ed a zaj\u00edmav\u011bj\u0161\u00ed. V takov\u00e9m \"d\u011brav\u00e9m\" p\u0159ipojen\u00ed je norm\u00e1ln\u00ed hran\u00ed v cloudu st\u011b\u017e\u00ed mo\u017en\u00e9. A\u010dkoli n\u011bkte\u0159\u00ed \u00fa\u010dastn\u00edci srovn\u00e1n\u00ed se s t\u00edm vyrovn\u00e1vaj\u00ed, i kdy\u017e ne ide\u00e1ln\u011b. <\/p>\n

\r\n \"P\u0159ehr\u00e1t\r\n
<\/div>\r\n <\/div><\/center>
\n GFN<\/b><\/p>\n

Probl\u00e9my jsou u\u017e velmi znateln\u00e9. Obraz je pixelovan\u00fd a rozmazan\u00fd. Hran\u00ed je st\u00e1le mo\u017en\u00e9, ale rozhodn\u011b to u\u017e nen\u00ed to, co GFN nab\u00edzelo na za\u010d\u00e1tku. A rozhodn\u011b to nen\u00ed zp\u016fsob, jak hr\u00e1t kr\u00e1sn\u00e9 hry. Kr\u00e1su u\u017e nelze ocenit. <\/p>\n

Playkey<\/b><\/p>\n

Hern\u00ed proces prob\u00edh\u00e1 docela dob\u0159e. Plynulost je, i kdy\u017e obraz trochu trp\u00ed. Mimochodem, vlevo naho\u0159e jsou \u010d\u00edsla, kolik ztracen\u00fdch paket\u016f se obnovuje. Jak vid\u00edme, obnovuje se 96 % paket\u016f.<\/p>\n

Loudplay<\/b><\/p>\n

Nespustilo se.<\/p>\n

Vortex<\/b><\/p>\n

Nen\u00ed mo\u017en\u00e9 hr\u00e1t ani p\u0159i velk\u00e9 snaze, frezov\u00e1n\u00ed (pozastaven\u00ed obr\u00e1zku, obnoven\u00ed video streamu z nov\u00e9ho fragmentu) je je\u0161t\u011b znateln\u011bj\u0161\u00ed. <\/p>\n

Stadia<\/b><\/p>\n

Slu\u017eba je v podstat\u011b nehrateln\u00e1. D\u016fvody u\u017e byly zm\u00edn\u011bny v\u00fd\u0161e. \u010cek\u00e1 se na sestaven\u00ed sn\u00edmku, nadbyte\u010dnost je minim\u00e1ln\u00ed, p\u0159i takov\u00fdch ztr\u00e1t\u00e1ch to nesta\u010d\u00ed. <\/p>\n

Sc\u00e9n\u00e1\u0159 \u010d. 5. Nepravideln\u00e9 ztr\u00e1ty 0,01 %.<\/h4>\n

\nNa 10 000 paket\u016f se 1x ztr\u00e1c\u00ed 40-70 paket\u016f za sebou. To znamen\u00e1, \u017ee ztr\u00e1c\u00edme p\u0159ibli\u017en\u011b 1 z 200 sn\u00edmk\u016f. K tomu doch\u00e1z\u00ed, pokud je buffer s\u00ed\u0165ov\u00e9ho za\u0159\u00edzen\u00ed p\u0159epln\u011bn a v\u0161echny nov\u00e9 pakety jsou jen tak vy\u0159azov\u00e1ny (dropov\u00e1ny), dokud se buffer neuvoln\u00ed. V\u0161ichni \u00fa\u010dastn\u00edci srovn\u00e1n\u00ed, krom\u011b Loudplay, s takov\u00fdmi ztr\u00e1tami n\u011bjak\u00fdm zp\u016fsobem pracovaly. <\/p>\n

\r\n \"P\u0159ehr\u00e1t\r\n
<\/div>\r\n <\/div><\/center>
\nGFN<\/b><\/p>\n

Obraz trochu ztratil na kvalit\u011b, stal se pon\u011bkud rozmazan\u00fdm, ale v\u0161echno je st\u00e1le hrateln\u00e9.<\/p>\n

Playkey<\/b><\/p>\n

V\u0161echno je velmi dobr\u00e9. Obraz je plynul\u00fd, zobrazen\u00ed je dobr\u00e9. Hr\u00e1t se d\u00e1 bez probl\u00e9m\u016f.<\/p>\n

Loudplay<\/b><\/p>\n

Prvn\u00edch n\u011bkolik sekund byl obraz, hrdina dokonce b\u011b\u017eel. Ale spojen\u00ed se serverem bylo brzy ztraceno. Ach, ten TCP protokol. Prvn\u00ed ztr\u00e1ta srazila slu\u017ebu na kolena. <\/p>\n

Vortex<\/b><\/p>\n

Objevuj\u00ed se b\u011b\u017en\u00e9 probl\u00e9my. Frezov\u00e1n\u00ed, lagy a to cel\u00e9. Hran\u00ed by bylo velmi obt\u00ed\u017en\u00e9 za takov\u00fdch podm\u00ednek.<\/p>\n

Stadia<\/b><\/p>\n

Hrateln\u00e9. Jsou znateln\u00e9 drobn\u00e9 v\u00fdkyvy, obraz se ob\u010das pixelizuje.<\/p>\n

Sc\u00e9n\u00e1\u0159 \u010d. 6. Nepravideln\u00e9 ztr\u00e1ty 0,1 %.<\/h4>\n

\nNa 10 000 paket\u016f se 10x ztr\u00e1c\u00ed 40-70 paket\u016f za sebou. To znamen\u00e1, \u017ee ztr\u00e1c\u00edme 10 z 200 sn\u00edmk\u016f.<\/p>\n

Hned \u0159eknu, \u017ee znateln\u00e9 probl\u00e9my se objevily u v\u011bt\u0161iny slu\u017eeb. Nap\u0159\u00edklad obraz se cuk\u00e1, tak\u017ee nadbyte\u010dnost u\u017e zde nepom\u00e1h\u00e1. To znamen\u00e1, \u017ee pozitivn\u00ed efekt p\u0159i pou\u017e\u00edv\u00e1n\u00ed technologie nadbyte\u010dnosti je, ale nen\u00ed velk\u00fd.<\/p>\n

Faktem je, \u017ee doba reakce na akce u\u017eivatele a samotn\u00e9 hry je omezen\u00e1, video stream mus\u00ed b\u00fdt nep\u0159etr\u017eit\u00fd. Obnovit stream na p\u0159ijatelnou kvalitu nen\u00ed mo\u017en\u00e9, bez ohledu na \u00fasil\u00ed slu\u017eeb. <\/p>\n

Objevuj\u00ed se artefakty (pokusy o kompenzaci ztr\u00e1ty paket\u016f, chyb\u00ed data) a trh\u00e1n\u00ed obrazu.<\/p>\n

\r\n \"P\u0159ehr\u00e1t\r\n
<\/div>\r\n <\/div><\/center>
\nGFN<\/b><\/p>\n

Kvalita obrazu znateln\u011b poklesla, bitrate byl z\u0159eteln\u011b sn\u00ed\u017een, a to velmi v\u00fdrazn\u011b.<\/p>\n

Playkey<\/b><\/p>\n

Zvl\u00e1d\u00e1 to l\u00e9pe \u2014 pravd\u011bpodobn\u011b proto, \u017ee je dob\u0159e nastaven\u00e1 redundance, nav\u00edc algoritmus bitrate pova\u017euje ztr\u00e1ty za p\u0159\u00edli\u0161 n\u00edzk\u00e9 a nep\u0159etv\u00e1\u0159\u00ed obraz na pixelovou ka\u0161i.<\/p>\n

Loudplay<\/b><\/p>\n

Nespustilo se.<\/p>\n

Vortex<\/b><\/p>\n

Spustil se, ale s hroznou kvalitou obrazu. Jsou velmi znateln\u00e9 trh\u00e1n\u00ed a poklesy. Hr\u00e1t za t\u011bchto podm\u00ednek je t\u00e9m\u011b\u0159 nemo\u017en\u00e9.<\/p>\n

Stadia<\/b><\/p>\n

S\u00fa jasn\u011b patrn\u00e9 trh\u00e1n\u00ed, co\u017e je jasn\u00fd ukazatel, \u017ee chyb\u00ed redundance. Obraz se na chv\u00edli zastav\u00ed, pak se objev\u00ed jin\u00e9 sn\u00edmky, nast\u00e1vaj\u00ed p\u0159eru\u0161en\u00ed video streamu. Hr\u00e1t se d\u00e1, pokud m\u00e1te velkou touhu a klinickou sklon k sebemrs\u010den\u00ed.<\/p>\n

Sc\u00e9n\u00e1\u0159 \u010d. 7. Nerovnom\u011brn\u00e9 ztr\u00e1ty 0,5%<\/h4>\n

\nNa 10 000 paket\u016f ztr\u00e1c\u00edme 40-70 paket\u016f za sebou 50kr\u00e1t. Ztr\u00e1c\u00edme 50 sn\u00edmk\u016f ze 200.<\/p>\n

Situace jako \"form\u00e1ln\u00ed p***c\". V\u00e1\u0161 router jisk\u0159\u00ed, u poskytovatele je hav\u00e1rie, dr\u00e1ty ohlodali my\u0161i, ale p\u0159esto chcete hr\u00e1t v cloudu. Jakou slu\u017ebu si vybrat? <\/p>\n

\r\n \"P\u0159ehr\u00e1t\r\n
<\/div>\r\n <\/div><\/center>
\nGFN<\/b><\/p>\n

Hr\u00e1t je ji\u017e velmi obt\u00ed\u017en\u00e9, pokud v\u016fbec mo\u017en\u00e9 \u2014 bitrate je velmi v\u00fdrazn\u011b sn\u00ed\u017een. Ztr\u00e1cej\u00ed se sn\u00edmky, m\u00edsto norm\u00e1ln\u00edho obrazu vid\u00edme \"mlhu\". Sn\u00edmky se neobnovuj\u00ed \u2014 chyb\u00ed informace pro obnovu. Pokud v\u016fbec GFN obnovu p\u0159edpokl\u00e1d\u00e1. To, jak agresivn\u011b slu\u017eba se sna\u017e\u00ed zachr\u00e1nit situaci bitrate, vyvol\u00e1v\u00e1 pochybnosti o jej\u00ed p\u0159ipravenosti pracovat s redundanc\u00ed. <\/p>\n

Playkey<\/b><\/p>\n

Je tu zkreslen\u00ed sn\u00edmku, obraz se t\u0159ese, tak\u017ee se opakuj\u00ed prvky jednotliv\u00fdch sn\u00edmk\u016f. Je vid\u011bt, \u017ee v\u011bt\u0161ina \"rozbit\u00fdch\" sn\u00edmk\u016f byla obnovena z \u010d\u00e1st\u00ed p\u0159edchoz\u00edch. To znamen\u00e1, \u017ee v nov\u00fdch sn\u00edmc\u00edch jsou \u010d\u00e1sti star\u00fdch sn\u00edmk\u016f. Ale obraz je p\u0159itom v\u00edcem\u00e9n\u011b jasn\u00fd. Ovl\u00e1dat se d\u00e1, ale v dynamick\u00fdch sc\u00e9n\u00e1ch, nap\u0159\u00edklad v boji, kde je pot\u0159eba dobr\u00e1 reakce \u2014 je to obt\u00ed\u017en\u00e9.<\/p>\n

Loudplay<\/b><\/p>\n

Nespustilo se.<\/p>\n

Vortex<\/b><\/p>\n

Spustil se, ale rad\u011bji by se nespou\u0161t\u011bl \u2014 hr\u00e1t to nelze.<\/p>\n

Stadia<\/b><\/p>\n

Slu\u017eba za takov\u00fdch podm\u00ednek je nehrateln\u00e1. D\u016fvody \u2014 nutnost \u010dekat na sestaven\u00ed sn\u00edmku a slab\u00e1 redundance. <\/p>\n

Kdo je v\u00edt\u011bz?<\/h3>\n

\nHodnocen\u00ed je samoz\u0159ejm\u011b subjektivn\u00ed. V koment\u00e1\u0159\u00edch se d\u00e1 polemizovat. No a prvn\u00ed m\u00edsto, samoz\u0159ejm\u011b, pat\u0159\u00ed lok\u00e1ln\u00edmu PC. Pr\u00e1v\u011b z toho d\u016fvodu, \u017ee cloudov\u00e9 slu\u017eby jsou velmi citliv\u00e9 na kvalitu s\u00edt\u011b, a ta je v re\u00e1ln\u00e9m sv\u011bt\u011b pom\u011brn\u011b nestabiln\u00ed, vlastn\u00ed hern\u00ed PC z\u016fst\u00e1v\u00e1 bezkonkuren\u010dn\u00ed. Ale pokud ho z n\u011bjak\u00e9ho d\u016fvodu nem\u00e1te, pod\u00edvejte se na hodnocen\u00ed.<\/p>\n

    \n
  1. Lok\u00e1ln\u00ed PC. O\u010dek\u00e1van\u00e9.<\/li>\n
  2. Playkey<\/li>\n
  3. GeForce Now<\/li>\n
  4. Google Stadia<\/li>\n
  5. Vortex<\/li>\n
  6. Loudplay<\/li>\n<\/ol>\n

    \nJako z\u00e1v\u011br p\u0159ipomenu, \u017ee kl\u00ed\u010dovou roli v cloudov\u00e9m hran\u00ed hraje odolnost v\u016f\u010di probl\u00e9m\u016fm se s\u00edt\u00ed:<\/p>\n