{"id":167,"date":"2025-10-06T15:40:15","date_gmt":"2025-10-06T15:40:15","guid":{"rendered":"https:\/\/www.visitnyc.store\/blog\/?p=167"},"modified":"2025-10-06T15:40:15","modified_gmt":"2025-10-06T15:40:15","slug":"wwdc25-apple-vision-video-notes-session-304-297","status":"publish","type":"post","link":"https:\/\/www.visitnyc.store\/blog\/wwdc25-apple-vision-video-notes-session-304-297\/","title":{"rendered":"WWDC25 Apple Vision Video Notes session #304 #297"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">(1) Started here: Explore video experiences for visionOS<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/developer.apple.com\/videos\/play\/wwdc2025\/304\">https:\/\/developer.apple.com\/videos\/play\/wwdc2025\/304<\/a><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>APMP is packaging for all kinds of camera video<\/li>\n\n\n\n<li>avconvert command is available<\/li>\n\n\n\n<li>high motion scenes have automatic immersion decrease\n<ul class=\"wp-block-list\">\n<li>detect high motion in settings (can be disabled)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>ursa cine\n<ul class=\"wp-block-list\">\n<li>59 megapixels per eye, 90 fps<\/li>\n\n\n\n<li>sharpness approaching human eye<\/li>\n\n\n\n<li>210 across and 180 up down<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Apple Immersive Video utility app for previewing<\/li>\n\n\n\n<li>framework read \/ write apple immersive programmatically (AVAssetWriter and CMTaggedBuffer)<\/li>\n\n\n\n<li>Apple Spatial Audio format?<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(2) Dive into: Learn about the Apple Projected Media Profile<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/developer.apple.com\/videos\/play\/wwdc2025\/297\">https:\/\/developer.apple.com\/videos\/play\/wwdc2025\/297<\/a><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>VR180 stereo in mov\/mp4 means it has to have both stereo metadata and projection hequ (half equirectangular)<\/li>\n\n\n\n<li>APMP is available exported (they call this metadata &#8230; signaling?) as .mov or .mp4 from EOS VR Utility<\/li>\n\n\n\n<li>CMTaggedBuffers available for recomposition of video an AVAssetWriterInput<\/li>\n\n\n\n<li>Stereoscopic recommendations are\n<ul class=\"wp-block-list\">\n<li>4320&#215;4320 per eye<\/li>\n\n\n\n<li>4k @ 30 FPS<\/li>\n\n\n\n<li>84 Mb\/sec for 10-bit\n<ul class=\"wp-block-list\">\n<li>70Mb\/sec for 8-bit<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>HEVC Main or HEVC Main 10<\/li>\n\n\n\n<li>chroma 4:2:0<\/li>\n\n\n\n<li>Color Rec. 709, P3-D65<\/li>\n\n\n\n<li>does not specify if this is for flat stereo\u00a0like iPhone Pro?<\/li>\n\n\n\n<li>They recommend not exceeding 150 megabits per second peak\n<ul class=\"wp-block-list\">\n<li>&#8220;Bitrate encoding settings are content dependent and should be chosen appropriately for your use case, but we recommend not exceeding 150 megabits per second peak.&#8221;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>AVQT 2.0 tools, helps evaluate perceptional quality of half-equirect as well as bit-rate ladders\n<ul class=\"wp-block-list\">\n<li>seems released from 2021 but updated for projection?<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>HLS tools recognize APMP<\/li>\n\n\n\n<li>APAC for ambisonic sound\n<ul class=\"wp-block-list\">\n<li>1st-order is 4 mics\/channels? 2nd order is 9, 3rd is 16<\/li>\n\n\n\n<li>same file plays on all apple platforms (AirPods spatial sound?)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>(1) Started here: Explore video experiences for visionOS https:\/\/developer.apple.com\/videos\/play\/wwdc2025\/304 (2) Dive into: Learn about the Apple Projected Media Profile https:\/\/developer.apple.com\/videos\/play\/wwdc2025\/297<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-167","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.visitnyc.store\/blog\/wp-json\/wp\/v2\/posts\/167","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.visitnyc.store\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.visitnyc.store\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.visitnyc.store\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.visitnyc.store\/blog\/wp-json\/wp\/v2\/comments?post=167"}],"version-history":[{"count":2,"href":"https:\/\/www.visitnyc.store\/blog\/wp-json\/wp\/v2\/posts\/167\/revisions"}],"predecessor-version":[{"id":170,"href":"https:\/\/www.visitnyc.store\/blog\/wp-json\/wp\/v2\/posts\/167\/revisions\/170"}],"wp:attachment":[{"href":"https:\/\/www.visitnyc.store\/blog\/wp-json\/wp\/v2\/media?parent=167"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.visitnyc.store\/blog\/wp-json\/wp\/v2\/categories?post=167"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.visitnyc.store\/blog\/wp-json\/wp\/v2\/tags?post=167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}