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JimmyjamesEU

Suspended
Jun 28, 2018
397
426
It's absurdly fast.

My i9 iMac hovers just under 90 fps at HEVC with VideoToolbox. The M1 does 240fps at HEVC.

The M1 also supports constant quality encodes which is the first device to do so with VTB. The quality is less than Intel Quick Sync based VTB at fixed encodes though.
Interesting results. May I ask what was the original source video? 1080p,4k? 8bit, 10bit?
 

Ritsuka

Cancelled
Sep 3, 2006
1,464
969
HandBrake latest nightly builds should work with M1 HEVC 10bit encoder.
Can someone test it? Get the nightly and select H.265 10bit (VideoToolbox) from the encoders list.
 

white7561

macrumors 6502a
Jun 28, 2016
934
386
World
Hello guys, i have a question. If I want to use ffmpeg to compress a video to h264/5 but using CRF instead of just limiting the bitrate, is it possible to do it in M1 with HW accel? Because all I can see is that videotoolbox doesnt support CRF so im stuck with cpu encoding..

Any help is appreciated. Thanks!
 

Admiral

macrumors 6502
Mar 14, 2015
408
991
Hello guys, i have a question. If I want to use ffmpeg to compress a video to h264/5 but using CRF instead of just limiting the bitrate, is it possible to do it in M1 with HW accel? Because all I can see is that videotoolbox doesnt support CRF so im stuck with cpu encoding..

Any help is appreciated. Thanks!

Are you required to use VideoToolbox?
 

Admiral

macrumors 6502
Mar 14, 2015
408
991
Nope but I heard it's the only way to use hw accel in Macs

Well, yes, but hardware-accelerated HEVC encoding on Mac is extremely sub-optimal in terms of both image quality and file size (especially file size). If your use case is streaming it's amazing, but in my opinion VideoToolbox hardware-accelerated encoding is not for anything you might encode and upload to YouTube or whatever.
 
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white7561

macrumors 6502a
Jun 28, 2016
934
386
World
Well, yes, but hardware-accelerated HEVC encoding on Mac is extremely sub-optimal in terms of both image quality and file size (especially file size). If your use case is streaming it's amazing, but in my opinion VideoToolbox hardware-accelerated encoding is not for anything you might encode and upload to YouTube or whatever.
Yeah . I just wanted to compress some Teams meeting . I usually just use h264 software encoding with high CRF. Just wondering if it can be faster on the new macs later. Since hw accel is usually much much faster.
 
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