Add native Dolby Vision & Atmos via AVPlayer

[DrHurt]

AVPlayer is currently the ONLY way to get Dolby Atmos and Dolby Vision working (properly) on iOS/tvOS. There is no other API.

AVPlayer does NOT require additional licensing by app devs to play Dolby.

It supports mp4 & hls natively but NOT mkv.

Infuse is currently the only app I’m aware of that can play mkv Dolby Vision & Atmos correctly.

I believe they demux the mkv and play compatible streams inside via AVPlayer likely via local hls playlist instead of remuxing the whole video to mp4

(This is probably why there’s a significant delay in infuse when starting playback of Dolby Atmos / Vision files).

Can KSPlayer do the same? Force Dolby files to play in AVPlayer…

[kingslay]

我的app是可以播放 Dolby P5的。 infuse 是跟Dolby购买了Dolby Atmos and Dolby Vision 授权。

[DrHurt]

@kingslay

With the latest Tracy Player, Dolby Vision P8 works but I only get Dolby Multichannel (NOT Atmos).

To fix this, audio track needs to go directly via AVPlayer (NOT AVAudioEngine or AudioUnit).

AVPlayer supports:

• raw atmos ec3 stream (extracted from mkv)
• or mp4 files, complexity_index_type_a must be set in dec3 (EC3SpecificBox) atom
• or HLS stream, #EXT-X-MEDIA:CHANNELS="12/JOC" must be set in manifest

It would be amazing if you add another "Audio Player Type" = AVPlayer and clock sync that with the video renderer.

Thank you for your excellent work on this project.

[DrHurt]

I’m still really looking forward to native Atmos on ksplayer. (Possibly ec3 via avplayer)

It’s the only thing missing from ksplayer to make it the ultimate iOS framework!

I know Apple makes it difficult but I’m sure you can make it work eventually.

[kingslay]

有一个解决方案可以做到用avplayer播放mkv。那就是把视频下载到本地，然后转为mp4格式。这样就可以用avplayer播放了。但是这样有两个问题，1. 需要等待视频进行下载完才可以播放。2. 会占用设备的硬盘大小，不大适合iOS和tvOS上使用。

[DrHurt]

@kingslay There is another way. We don't need to convert the entire mkv to mp4.

You can just extract the "audio.ec-3" track and play that separately using avplayer.

Try this: ffmpeg -i input.mkv -vn -sn -c copy audio.ec3

play audio.ec3 using avplayer. It works & TV will show Atmos logo.

Can we stream the ec-3 track separately to avplayer?

This video track will need to be played separately.