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18:48:22 <breakout-bot> Meeting: Support for HEIF as an imagery format in web browsers
18:48:22 <breakout-bot> Chair: Joe Stufflebeam
18:48:22 <breakout-bot> Agenda: https://github.com/w3c/breakouts-day-2026/issues/14
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18:48:23 <breakout-bot> Zakim, clear agenda
18:48:23 <Zakim> agenda cleared
18:48:23 <breakout-bot> Zakim, agenda+ Pick a scribe
18:48:25 <Zakim> agendum 1 added
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18:48:25 <breakout-bot> Zakim, agenda+ Goal of this session
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18:48:26 <breakout-bot> Zakim, agenda+ Discussion
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18:48:26 <breakout-bot> Zakim, agenda+ Next steps / where discussion continues
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18:48:27 <breakout-bot> Zakim, agenda+ Adjourn / Use IRC command: Zakim, end meeting
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20:53:45 <rjks> zakim, start meeting
20:53:45 <Zakim> RRSAgent, make logs Public
20:53:46 <Zakim> please title this meeting ("meeting: ..."), rjks
20:54:53 <rjks> Meeting: Support for HEIF as an imagery format in web browsers
20:55:05 <rjks> Agenda: https://www.w3.org/events/meetings/1c899b48-9abe-4875-8533-91fc0c0ffe2b/#agenda
20:55:18 <rjks> Chair+ Joe Stufflebeam, Rob Smith
20:55:34 <rjks> Present+ Joe Stufflebeam, Rob Smith
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21:06:23 <rjks> Joe: Any issues with recording?
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21:06:41 <rjks> ...none heard
21:07:54 <rjks> ...HEIF file format and case for browser support
21:08:11 <rjks> ...feedback and support from community
21:08:25 <rjks> ...foundation format for web
21:08:47 <rjks> ...early web had limited capability
21:09:16 <rjks> ...early image formats - JPEG, GIF and PNG
21:09:25 <rjks> ...still using same formats now
21:09:41 <rjks> ...added support for animation, but still limited
21:09:58 <rjks> ...HEIF offers more features
21:10:24 <rjks> ...each format has its own strengths
21:10:43 <rjks> ...users must choose based on requirements
21:11:00 <rjks> ...images are widely used on the web
21:11:18 <rjks> ...still using original formats
21:11:48 <rjks> ...new formats include webp and avif
21:12:01 <rjks> ...adopt single format instead
21:12:20 <rjks> ...can use different codecs
21:12:36 <rjks> ...container can include many codecs
21:12:51 <rjks> ...HEIF based on ISOBMFF
21:13:06 <rjks> ...commonly used for video
21:13:26 <rjks> ...new capabilities built on ISOBMFF
21:13:40 <rjks> ...HEIF designed as JPEG replacement
21:14:01 <rjks> ...other derivatives like CMAF and OMAF
21:14:19 <rjks> ...built on same ISOBMFF
21:14:31 <rjks> ...common software support
21:15:07 <rjks> ...flexibility and futureproof built in
21:15:25 <rjks> ...HEIF agnostic of codecs
21:15:44 <rjks> ...ranges from uncompressed to highly compressed
21:15:57 <rjks> ...applies to still and motion imagery
21:16:08 <rjks> ...HEIF is royalty-free
21:16:17 <rjks> ...differs from HEVC
21:16:43 <rjks> ...list of key features
21:16:54 <rjks> ...focus on still imagery
21:17:10 <rjks> ...different formattingoptions
21:17:45 <rjks> ...supports image collections
21:17:57 <rjks> ...animations and slide shows
21:18:18 <rjks> ...support for tiled images
21:18:29 <rjks> ...and for image transforms
21:18:51 <rjks> ...and descriptive metadata
21:19:25 <rjks> ...image pyramids which are optimised for cloud access
21:19:44 <rjks> ...region items to label content
21:20:18 <rjks> ...SlimHEIF for tiny images
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21:21:03 <rjks> ...and media encryption
21:22:13 <rjks> ...codec options include uncompressed for high quality
21:22:27 <rjks> ...supports multi-spectral imagery
21:22:47 <rjks> ...also supports AV1 which is royalty-free
21:23:05 <rjks> ...and includes compression
21:23:40 <rjks> ...also supports JPEG2000
21:24:12 <rjks> ...support for metadata
21:24:32 <rjks> ...with plugin model - internal or sidecar file
21:25:22 <rjks> ...attach metadata in different ways
21:25:47 <rjks> ...synchronous and asynchronous support
21:26:08 <rjks> ...high precision timing and semantic data
21:26:16 <rjks> ...key use cases
21:26:30 <rjks> ...including basic web apps
21:27:04 <rjks> ...view part of an image without downloading the whole file
21:27:42 <rjks> ...can combine still and motion imagery
21:28:11 <rjks> ...geospatial and scientific use cases
21:28:42 <rjks> ...have large datasets which can be accessed efficiently with HEIF
21:29:16 <rjks> ...GeoTIFF includes some of these features, but is limited
21:29:49 <rjks> ...high dynamic range to improve quality
21:30:26 <rjks> ...search and rescue use case benefits from higher quality images
21:31:00 <rjks> ..also medical images to spot vital details
21:31:28 <rjks> ...making the case for HEIF as a browser format
21:32:00 <rjks> ...generally applicable and futureproof
21:32:03 <jshouchin> We have know of the need for more than 8-bit imagery and HDR applications since 1998 even for consumer photography (I was with Kodak at the time, and every effort to jam that extra data into JPEG failed). Yet we're still stuck with JPEG almost 30 years later. It's time to get a format with real options supported in the browser.
21:33:09 <rjks> ...HEIF covers many different capabilities in a single format
21:34:22 <jshouchin> The big question will be which codecs and options to "require" for broad browser adoption
21:35:10 <rjks> ...path forward can be smooth migration, not a cliif edge
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21:36:25 <Said> q+
21:37:30 <Dimitri> To clarify. There no such thing as codec options of HEIF. One can define carriage format for any codec for carriage in HEIF. The entire idea is to avoid defining codec-agnostic features, over and over again.
21:37:46 <rjks> Said: Apple already supports HEIF
21:39:01 <rjks> ...biggest issue is how to give web developer control of what is displayed
21:39:20 <rjks> ...how to choose light/dark style?
21:39:46 <rjks> ...how to handle large images?
21:39:57 <rjks> ...decoding whole image is too big
21:40:42 <rjks> ...how to restrict level of detail?
21:40:56 <jshouchin> Q+
21:40:59 <rjks> ...slow adoption in last 5 years
21:42:00 <rjks> Joe: where to start in image?
21:42:18 <rjks> ...depends on use case
21:43:03 <rjks> ...expose small metadata to begin
21:43:31 <rjks> Scott: photography use case from Kodak
21:43:58 <rjks> ...requirements have existed for a long time
21:44:15 <rjks> ...need support in all browsers
21:44:22 <rjks> q+
21:45:20 <rjks> ...how to inform browser beforehand?
21:46:08 <rjks> Joe: how to present initial image information?
21:46:31 <Said> q+
21:46:45 <rjks> Scott: comparison with MPEG-DASH?
21:47:25 <rjks> Joe: media presentation description in DASH
21:47:38 <rjks> ...can scale back
21:47:42 <Dimitri> DASH or HLS, both manifests. both use CMAF chunks on the file format level
21:48:35 <rjks> Jim: flythough use case
21:49:52 <rjks> ...cockpit view has too much information
21:50:50 <rjks> ...lo-res for distant features, hi-res for close features
21:51:06 <rjks> Chris: PNG interest
21:51:50 <rjks> ...difficult to add new format to browsers because can't be removed later
21:51:54 <Said> q-
21:52:00 <rjks> q-
21:53:43 <rjks> Joe: Dirk has done development work in libheif
21:53:53 <rjks> Rob: next steps?
21:54:15 <rjks> ...establish a Community Group?
21:54:57 <rjks> Scott: show people what HEIF can do
21:55:21 <Dimitri> q
21:57:07 <rjks> Rob: agreement for CG?
21:57:12 <Dimitri> q+
21:57:18 <rjks> ...no objection heard
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01:54:57 <Ian> rrsagent, make minutes
01:54:59 <RRSAgent> I have made the request to generate https://www.w3.org/2026/03/26-support-for-heif-minutes.html Ian
01:55:06 <Ian> rrsagent, set logs public
01:55:07 <Ian> rrsagent, bye
01:55:07 <RRSAgent> I see no action items
01:55:07 <Ian> zakim, bye
01:55:07 <Zakim> leaving.  As of this point the attendees have been Joe, Stufflebeam, Rob, Smith
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