[Cin] x265 4.0 quietly out

[Phyllis Smith]

Updated X265 library to version 4.0 was checked into GIT.  It deserves more
generic testing but I have encoded at least 4 files and decoded at least 3
by loading and playing.  Thanks to Andrew, a patch to ffmpeg 7.0 was added
to update x265 into a working set.

On Thu, Sep 26, 2024 at 2:58 AM Andrew Randrianasulu via Cin <
cin at lists.cinelerra-gg.org> wrote:

>
> https://bitbucket.org/multicoreware/x265_git/commits/6318f223684118a2c71f67f3f4633a9e35046b00
>
> ======
>
> Version 4.0
>
> ===========
>
> Release date - 13th September, 2024.
>
> New feature
>
> -----------
>
> 1. Alpha Channel feature.
>
> 2. Screen Content Coding (SCC).
>
> 3. MV-HEVC feature.
>
> Enhancements to existing features
>
> ---------------------------------
>
> 1. Added support for the VMAF v3.x.
>
> API changes
>
> -----------
>
> 1. Add command line parameter for Alpha Channel feature :option:`--alpha`.
>
> 2. Add command line parameter for SCC feature :option:`--scc 1`.
>
> 3. Add command line parameters for the MV-HEVC feature :option:`--multiview-config "multiview_config.txt"`.
>
> Optimizations
>
> ---------------------
>
> 1. Arm SIMD optimizations: Several time-consuming scalar C functions now have SIMD implementations on Arm platforms. Existing Arm SIMD implementations have also been optimized. These optimizations result in up to 57% faster encoding compared to release 3.6.
>
> 2. Arm SIMD optimizations include use of Armv8.4 DotProd, Armv8.6 I8MM, and Armv9 SVE2 instruction set extensions. The following algorithms now have optimized SIMD implementations: SAD, SSE, DCT, SAO, convolution, quantization, intra_planar, intraFilter, intrapred DC and IDCT16x16.
>
> Bug fixes
>
> ---------
>
> 1. Fix for y4m pipe input broken.
>
> 2. Fix SCC crash on multipass encode.
>
> 3. Fix mcstf when :option:`--bframes` value was less than 5.
>
> 4. Fix lowpass DCT for high bit depth.
>
> 5. Added build support for Visual Studio 17.
>
> 6. Fix issue in default code flow and memory leak.
>
> 7. Framethreads tuning for Windows ARM devices.
>
> 8. Fix scc crash on multipass encode.
>
> ====
>
>
> I think only ffmpeg 7.1 (already branched)
>
>  will have multiview (stereo?) HEVC decoding, not
>
> even sure how(if) it can be represented in cinelerras ...
>
>
> Time to test, I guess.
>
>
> --
> Cin mailing list
> Cin at lists.cinelerra-gg.org
> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>
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