Is the quality measurably better with the higher bitrates?
And Yi 4K has been already hacked - at least the bitrates - that goes up now to 90-150Mbps (instead of 60Mbps).
Sale for EU warehouse now
Did you guys have to refocus the Yi 4K lens? Mine was factory set a bit too close to get sharp on distant objects. Turned it just a bit clockwise and now is fine - from about 60cm to infinity.
@Readbook - as far as I know, Gearbest is the only official online shop for Xiaomi 4K.
Shit happens, but I never had issues with them.
They can be slow to ship some rare items, but usually they indicate such things.
Be careful when ordering from GearBest. I waited 15 days and they didn't ship it, and I canceled the order
Few days back was $206 from EU warehouse.
@trevmar - I am on 1.1.0 fw, like you, but can't see your "2.5K mode 2560x1520" as mine says in 2.5K mode: 2560x1920 and it's 4:3, not 16:9. Am I missing something..?
Xiaomi has any plans for reducing price?
@zcream I don't know yet. I didn't get any inform about bitrate from YI Tech.
All I know that is firmware history but there is no inform about bitrate.
@o2warp - it shoots 2.7k at 45mbps and 4k at 60mbps still ?
Answer available :-)
Resolution Bit Rate(Mbit/s) Size per 1 minute(MB)
4K P30 60 450
4K Ultra P30 60 450
2.5K P30 45 337.5
1440p P60 45 337.5
1440p P30 30 225
1080p P120 60 450
1080p Ultra P120 60 450
1080p P60 45 337.5
1080p Ultra P60 45 337.5
1080p P30 30 225
1080p Ultra P30 30 225
960p P120 60 450
960p P60 45 337.5
720p P240 60 450
720p Ultra P120 60 450
720p Ultra P60 45 337.5
480p P240 60 450
I think with this 3.8mm 16MP lens it can be even better!
Xiaomi(x) Xiaoyi(o) Firmware v1.2.3 added 2.7k mode instead of 2.5k
So. It supports 2.7k/60p, 2.7k/30p with EIS and Lens distortion correct.
Thanks for the links, Mike. I wonder how well the Protune works at 2.5K and 4K ? That is a primary differentiation IMO. As for the reviewer's comment that the GoPro sound is better, I used the audio from the Yi as my primary feed for mix-down on my last video. 'Perfectly' flat, It sounded great with just a little bass boost and treble peaking, so I am not sure how GoPro could improve on that...
GoPro Hero 5 comparison
https://bestactioncamera.net/gopro-hero5-black-vs-xiaomi-yi-4k/
I found my next purchase :) https://www.back-bone.ca/product/ribcage-yi-4k-mod-kit/ You're essentially paying about $350 for a camera that takes c-mount (and S-mount) lenses, and shoots 4k at 24p (new firmware update adds this)!
Does it offer lock exposure in video modes?
Mark: Yes. I am shooting mainly 2.5K mode 2560x1520, with full stabilizer and geometry correction, so I stayed on firmware 1.1
DrDave: Haven't tested the 24p, sorry.
I suspect the newer firmware limitations may be due to weak batches of Ambarella chips...
Seriously, the firmware update lowered the ability of the camera to take video?
"Changed "1080 Ultra 120 FPS" to "1080 Ultra 90 FPS"." Not able to shoot 120 FPS? "Changed "4K Ultra 25FPS/30FPS" to "4K Ultra 24FPS"." No longer able to shoot 4K at 30 FPS?
@trevmar Is the 4K/24 23.086? Tx.
With the new firmware (1.3.3) and Yi Action app, the camera can now stream directly to Facebook! There is a custom option to stream to other RTMP ingesters like Youtube and Twitch. I made a quick video to demonstrate how to stream live to youtube:
Good review. But I was surprised they didn't remark on the geometry correction, which, IMHO, is a key feature of the camera. But maybe they did comment, and I missed it in translation...
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