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In YouTube home page, when I choose a video in 4K HDR channel, the transfer id is always 'Bt709', no matter the below function returns true or false.

[0627/102524:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(video/webm; codecs="vp9"; eotf=bt709)

Is there other configuration controlling this? If no, how can we test HDR implementation?

Thanks!

Ceri Ruan
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1 Answers1

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That is one of the capability checks. In our Technical Requirements document, if you support HDR, we require you to support all of "bt709", "smpte2084", "arib-std-b67". So we expect you to pass that "bt709" query to playback HDR videos.

If you pass "bt709" capability check, you will get another capability check. If you don't support it, return false. Then you will get respective HDR streams that the video has.

Daniel Juyung Seo
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  • Actually we pass both 'bt709' and 'catavison' check, we still cannot get respective HDR streams. ( test with NHykpuFkKQ8) [cobalt]>[0101/010355:INFO:media_source.cc(331)] MediaSource::IsTypeSupported(video/webm; codecs="vp9"; eotf=bt709) -> probably/true [cobalt]>[0101/010355:INFO:media_source.cc(331)] MediaSource::IsTypeSupported(video/webm; codecs="vp9"; eotf=catavision) -> probably/true – Ceri Ruan Jun 28 '17 at 03:44
  • I find fault that I ignore the opposite check of 'catavison'. Thanks for your information. – Ceri Ruan Jun 28 '17 at 05:41
  • Great to hear that! – Daniel Juyung Seo Jun 28 '17 at 08:53