[Libav-user] Fast colourspace conversion on iOS
nuno.santos at imaginando.pt
Sat Jul 17 15:24:06 EEST 2021
Thanks for your reply.
The referred measures are based on:
- Intel i5 2.4 Ghz quad core (desktop)
- 2018 iPad Pro 12’9 (A12X processor)
> On 17 Jul 2021, at 12:49, Nicolas George <george at nsup.org> wrote:
> Nuno Santos (12021-07-17):
>> I’m using libav to mux a video file at full hd.
>> At some point I need to convert the original frame at 1920x1080 RGB to YUV420P
>> This requires sws_scale to be called. On desktop it takes around 7/8 ms to convert a frame. On iOS it takes 28 ms.
>> I guess sws_scale is not optimised for iOS. How is people doing it on iOS then?
> I do not think that sws_scale requires OS-specific optimizations.
> What are the CPUs of your desktop and mobile devices?
> Nicolas George
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