{"rewrite":{"id":"r_837d2fe3b7e2273a68d5e68f","clusterId":"c_3cd032c15707e9886b7875eb","slug":"twitch-tests-dual-format-streaming-for-horizontal-and-vertical-video","model":"deepseek-v4-flash","headline":"Twitch Tests Dual Format Streaming for Horizontal and Vertical Video","summary":"Twitch is testing Dual Format Streaming, letting streamers broadcast in both horizontal and portrait modes simultaneously. Viewers see the correct orientation based on their device. The beta is open to registered streamers. Other updates from TwitchCon Rotterdam 2026 include 1440p streaming for all partners and affiliates, a summary feature for late-arriving viewers, and improved live-start notifications.","whyItMatters":"The feature addresses the split between desktop and mobile viewing habits on a single platform, removing the need for streamers to choose one orientation or run two separate broadcasts.","webCardHtml":"\u003cp\u003eTwitch announced Dual Format Streaming at TwitchCon Rotterdam 2026, a beta feature that lets streamers send both a horizontal and a portrait feed from one broadcast. Viewers on PCs and TVs see the horizontal version; viewers holding a smartphone vertically see the portrait version. If a phone is turned sideways, it shows the horizontal feed. The feature works with OBS Studio (version 31.1.2 or later, 32.0.0 or higher recommended), Streamlabs, Streamrun, and XSplit. OBS users need a plugin. Twitch recommends streamers account for a 48-pixel header at the top and chat at the bottom of the portrait layout. The event also brought 1440p streaming to all partners and affiliates, a summary tool for viewers who join mid-stream, and better live-start notifications.\u003c/p\u003e","blueskyPost":"Dual Format Streaming solves a device-orientation problem, but the 1440p expansion for affiliates is the bigger shift: it lowers the quality gap between partnered and non-partnered streamers.","twitterPost":"Dual Format Streaming solves device orientation. The bigger shift: 1440p for affiliates narrows the quality gap with partners.","threadsPost":"Twitch's Dual Format Streaming addresses device fragmentation, but the 1440p expansion for affiliates is the structural change. It narrows the quality gap between partnered and non-partnered streamers, which changes the incentive for affiliates to pursue partnership purely for bitrate.","newsletterBlurb":"Twitch is testing Dual Format Streaming, letting streamers broadcast in both horizontal and portrait modes simultaneously. Viewers see the correct orientation based on their device. The feature was announced at TwitchCon Rotterdam 2026 alongside 1440p streaming for all partners and affiliates, a summary tool for late-arriving viewers, and improved live-start notifications.","attributionJson":"[{\"source\":\"GIGAZINE\",\"url\":\"https://gigazine.net/news/20260601-dual-format-streaming-horizontal-vertical/\",\"title\":\"Twitch now allows simultaneous streaming in landscape and portrait modes, also introduces 1440p streaming expansion and summary feature for latecomers\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":3820,"outputTokens":608,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1780290911,"createdAt":"2026-06-01T05:04:04.000Z","publishedAt":"2026-06-01T05:08:10.000Z","updatedAt":"2026-06-01T05:08:10.000Z"},"cluster":{"id":"c_3cd032c15707e9886b7875eb","canonicalTitle":"Twitchで横長画面と縦長画面の同時配信が可能に、1440p配信の拡大や途中参加者向けの要約機能も登場","representativeArticleId":"a_e783ad9f8154acd29bb70e3e","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[],\"studios\":[],\"people\":[],\"type\":\"news\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-06-01T02:56:00.000Z","lastSeenAt":"2026-06-01T02:56:00.000Z","updatedAt":"2026-06-01T05:08:10.000Z"},"attribution":[{"source":"GIGAZINE","url":"https://gigazine.net/news/20260601-dual-format-streaming-horizontal-vertical/","title":"Twitchで横長画面と縦長画面の同時配信が可能に、1440p配信の拡大や途中参加者向けの要約機能も登場"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":[],"studios":[],"people":[],"type":"news","domain":"other","is_roundup":false},"keyFacts":["Twitch announced Dual Format Streaming at TwitchCon Rotterdam 2026, a beta feature that lets streamers send both a horizontal and a portrait feed from one broadcast.","Viewers on PCs and TVs see the horizontal version; viewers holding a smartphone vertically see the portrait version.","The feature works with OBS Studio (version 31.1.2 or later, 32.0.0 or higher recommended), Streamlabs, Streamrun, and XSplit.","Twitch also announced 1440p streaming for all partners and affiliates, a summary tool for viewers who join mid-stream, and better live-start notifications."]}