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Re: [Hls-interest] coming to Apple HLS clients later this year: M-JPEG support

Alex Giladi <alex.giladi@gmail.com> Wed, 23 February 2022 18:17 UTC

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From: Alex Giladi <alex.giladi@gmail.com>
Date: Wed, 23 Feb 2022 11:17:05 -0700
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To: Roger Pantos <rpantos@apple.com>
Cc: hls-interest@ietf.org, hls-announce@lists.apple.com
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Subject: Re: [Hls-interest] coming to Apple HLS clients later this year: M-JPEG support
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Thanks!

On Wed, Feb 23, 2022, 11:06 AM Roger Pantos <rpantos@apple.com> wrote:

> Hi Alex. A platform with a software decoder for individual HEVC images can
> in principle consume I-frame playlists containing HDR10 / Dolby Vision /
> HLG segments.
>
>
> Roger.
>
> On Feb 23, 2022, at 10:01 AM, Alex Giladi <alex.giladi@gmail.com> wrote:
>
> Hi Roger,
> What do we do for HDR? Any plans for HEIF?
> Best,
> Alex.
>
> On Wed, Feb 23, 2022 at 10:04 AM Roger Pantos <rpantos=
> 40apple.com@dmarc.ietf.org> wrote:
>
>> Hi folks. This is just a quick heads-up to let you know that in an OS
>> release later this year, the Apple HLS clients will be updated to support
>> Motion-JPEG fMP4 segments (i.e. JPEG images inside fMP4 containers). This
>> will allow you to provide I-frame playlists (for both VOD and live content)
>> that contain JPEG I-frames, rather than AVC or HEVC as previously supported.
>>
>> We're doing this to support interoperability with lower-end devices from
>> other manufacturers that cannot spawn a second video decoder instance, but
>> can decode JPEG in software.
>>
>> M-JPEG is specified in ISO/IEC 23008-12 "High efficiency coding and media
>> delivery in heterogeneous environments —Part 12: Image File Format."  The
>> 4cc codec type is 'mjpg' with no parameters (http://mp4ra.org/#/codecs),
>> So an example EXT-X-I-FRAME-STREAM-INF would be:
>>
>>
>> #EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=331000,CODECS="mjpg",URI="iframe_index.m3u8"
>>
>> We also plan to update our mediafilesegmenter tool to enable it to
>> produce M-JPEG fMP4 segments from JPEG source.
>>
>>
>> regards,
>>
>> Roger Pantos
>> Apple Inc.
>> --
>> Hls-interest mailing list
>> Hls-interest@ietf.org
>> https://www.ietf.org/mailman/listinfo/hls-interest
>>
>
>

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