[MacPorts] #64767: Apple Silicon cpu capabilities

MacPorts noreply at macports.org
Fri Mar 4 21:52:16 UTC 2022


#64767: Apple Silicon cpu capabilities
--------------------------+--------------------
  Reporter:  0xdd-co      |      Owner:  (none)
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  x265         |
--------------------------+--------------------
Description changed by 0xdd-co:

Old description:

> I noticed drastically slower HEVC encoding using ffmpeg/x265 on my
> MacBook Pro compared to Handbrake. When I run `x265 -V`, I noticed the
> following:
>
> ```
> x265 [info]: HEVC encoder version 0.0
> x265 [info]: build info [Mac OS X][clang 13.0.0][32 bit][noasm] 8bit
> x265 [info]: using cpu capabilities: none!
> ```
>
> Seems like the Handbrake build has NEON listed under cpu capabilities,
> which might account for the slightly faster encoding time.

New description:

 I noticed slightly slower HEVC encoding using ffmpeg/x265 on my MacBook
 Pro compared to Handbrake (~3-5 fps encoding 4K footage). When I run `x265
 -V`, I noticed the following:

 ```
 x265 [info]: HEVC encoder version 0.0
 x265 [info]: build info [Mac OS X][clang 13.0.0][32 bit][noasm] 8bit
 x265 [info]: using cpu capabilities: none!
 ```

 Seems like the Handbrake build has NEON listed under cpu capabilities,
 which might account for the slightly faster encoding time.

--

-- 
Ticket URL: <https://trac.macports.org/ticket/64767#comment:1>
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