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16th February 2024, 06:29 | #21 | Link |
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Well if one does not need inter layer prediction it is pretty easy to merge two HEVC streams into one MV-HEVC stream...
Doing inter layer is pretty easy too if one can modify the reference picture list setup of layer > 0. I wonder why there is no patch for x265 yet. |
16th February 2024, 22:19 | #22 | Link | ||
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Among other things, x265 would need a way to input multiple synchronized sources to encode from. Getting interlayer working, including rate control. Getting all the signaling working and tested. The R&D is much more D than R, but it's still work for multiple developers for multiple months. |
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16th February 2024, 22:36 | #23 | Link |
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Ben, could you please look at https://forum.doom9.org/showthread.p...69#post1997769
I made a post here, but then it disappeared for some reason. |
17th February 2024, 09:45 | #24 | Link | ||
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17th February 2024, 12:04 | #25 | Link | |
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26th March 2024, 05:50 | #26 | Link |
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Thought I'd weigh-in on some of this. For context, I've written a bit about what Apple is doing with MV-HEVC here: https://blog.mikeswanson.com/post/74.../spatial-video
Also, the Apple streams I've looked at show ~50% savings for the second layer. Interestingly, this doesn't appear to be the same encoder as what is currently provided in AVFoundation. Or at least it's a much more customized/future version. As far as I can tell, AVFoundation (Mac, iPhone, and Vision Pro) is encoding two separate HEVC streams and stitching them together with no inherent savings or inter-layer prediction. The AVFoundation encoder also doesn't seem to support multi-pass encoding or rate control beyond simple bitrate averages. I'm hoping that all of this improves with an upcoming release or perhaps at WWDC24. |
27th March 2024, 23:58 | #27 | Link | |
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I'm pleased but unsurprised Apple has done better. |
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multiview, mv-hevc, stereo 3d, stereoscopic 3d |
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