HEVC Bit Rate Ladder

21st November 2017, 22:22

Jan Ozer published an interesting article today, prompted by a conversation we had at Streaming Media East. http://www.streamingmedia.com/Articl...S--121878.aspx

iwod · 29th November 2017, 05:53

Do Apple have their own HEVC encoder? Would it be any different to x265 in the bitrate ladder scenario.

I know in theory those comment on bitrate ladder sound perfectly reasonable, but just wondering if Apple has something else in their mind. Also the bitrate saving and recommendation seems very conservative to me.

benwaggoner · 29th November 2017, 17:38

In reference to the original article, one reason to have some low resolution streams is for when content is playing back in a small window. Even with a hardware decoder, there is some battery hit from memory bandwidth and such from higher resolutions.

Of course, if a given bitrate looks good at a higher resolution, and a lower resolution is desired, having that be at a lower bitrate that looks appropriate at that resolution would be appropriate.

21st November 2017, 22:22	#1 \| Link
x265_Project Guest Posts: n/a	HEVC Bit Rate Ladder Jan Ozer published an interesting article today, prompted by a conversation we had at Streaming Media East. http://www.streamingmedia.com/Articl...S--121878.aspx

29th November 2017, 17:38	#3 \| Link
benwaggoner Moderator Join Date: Jan 2006 Location: Portland, OR Posts: 4,770	In reference to the original article, one reason to have some low resolution streams is for when content is playing back in a small window. Even with a hardware decoder, there is some battery hit from memory bandwidth and such from higher resolutions. Of course, if a given bitrate looks good at a higher resolution, and a lower resolution is desired, having that be at a lower bitrate that looks appropriate at that resolution would be appropriate. __________________ Ben Waggoner Principal Video Specialist, Amazon Prime Video My Compression Book

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29th November 2017, 05:53	#2 \| Link
iwod Registered User Join Date: Apr 2002 Posts: 756	Do Apple have their own HEVC encoder? Would it be any different to x265 in the bitrate ladder scenario. I know in theory those comment on bitrate ladder sound perfectly reasonable, but just wondering if Apple has something else in their mind. Also the bitrate saving and recommendation seems very conservative to me.