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smilespray 14 hours ago

Not OP, but 2hr battery time for video playback vs 20hr would be the entire point of this thread. HW decoding is an order of magnitude more efficient.

breve 7 hours ago | parent [-]

That isn't the benchmark set by petcat. petcat's goal post is 15 minutes to 20% battery with AV1 playback.

It's baffling that petcat won't simply try it. Maybe he has awkwardly discovered he does have hardware AV1 support after all.

I've still got my old iPhone 7. I'll dust it off and do the experiment. I think it'll do at least 90 minutes in VLC.

petcat 7 hours ago | parent [-]

Software video decoding on a CPU is woefully inefficient and will drain your battery. Full stop.

> I've still got my old iPhone 7. I'll dust it off and do the experiment. I think it'll do at least 90 minutes in VLC.

Your "old iPhone 7" probably wont even boot up now, let alone play 1080p AV1 video for more than 5 minutes. Go ahead, try it.

breve 4 hours ago | parent [-]

> Your "old iPhone 7" probably wont even boot up now, let alone play 1080p AV1 video for more than 5 minutes.

None of your predictions came true. In fact, you were more than 24 times wrong about it.

My 10-year-old iPhone 7 with its 10-year-old battery and a small crack in the screen, hardware which was released before AV1 was released, did boot up. I charged it to 99%.

I downloaded a 4 minute music video. It's 1080p25 1609kbps AV1 video, 48khz 122kbps stereo Opus audio in an MP4 container.

Using VLC 3.7.2 (which uses dav1d for decoding AV1), I played the video continuously on repeat. It took 122 minutes for the battery to go from 99% to 20%. At 20% the phone switched to low power mode and kept playing the video.

I should have put it in low power mode the whole time. I'll try that next to see if it can go longer.

In the meantime, what we can conclude is that the iPhone 7 is mighty.

dav1d, most especially, is mighty.

petcat isn't.