On Tue, Feb 7, 2023 at 4:41 PM Martin Storsjö <mar...@martin.st> wrote: > > Hi Devin, Thilo, > > On Tue, 7 Feb 2023, Thilo Borgmann wrote: > > > Am 07.02.23 um 21:19 schrieb Devin Heitmueller: > >> On Mon, Feb 6, 2023 at 6:24 AM Thilo Borgmann <thilo.borgm...@mail.de> > >> wrote: > >>> Martin pointed out we don't need an M2 for FATE as the instruction sets > >>> are equal on both machines. > >> > >> It may be worth noting that while the M1 and M2 have the same > >> instruction set, there is no guarantee the video processing blocks are > >> identical. At a minimum we know that the ProRes acceleration supports > >> 8K resolutions in the M2. > > Ah, good point. Yeah they're probably not identical, but I would kinda > expect them to be mostly similar. > > >> I got burned by a subtle change in behavior for videotoolbox between > >> Intel and M1, > > Yeah those two implementations are entirely totally different - they > differ on essentially every single observable detail. > > >> so it's possible there are comparable differences between M1 and M2. > > Yes it's somewhat possible that something could differ, but TBH I don't > expect the difference to be very big. > > E.g., I've tracked bugs in Apple's HW HEVC encoder, where the same bug has > been observable across many generations of iPhones up until the M1 (until > the bug was fixed in the latest iOS and macOS updates last year). > > >> If the tests include validating hardware acceleration then there may > >> still be benefits in running the tests on both platforms. > > > > Thanks for throwing that in. AFAICT we still don't cover hw accells in FATE, > > though. > > Yeah we don't do that currently - but we probably should; at least some > level of smoke testing would be extremely useful. > > In any case - I'm not arguing against using the available funds for > getting an M2, that sounds like a totally reasonable thing to do - I'm > just saying that I don't think it gives much extra value in the context of > a separate FATE instance. >
I don't know this for sure, but I suspect that we're going to see future enablement of AV1 decoding on M2, judging by the Safari release notes: https://developer.apple.com/documentation/safari-release-notes/safari-16_4-release-notes Quote: "Added WebRTC support for hardware AV1 decoding on supported device configurations." Of course, it's just a guess, but if we start testing hwaccels, that might be relevant eventually. -- 真実はいつも一つ！/ Always, there's only one truth! _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
