There have been small-ish video cameras for a very long
time. There have been robust video cameras for a very long time. But it was
GoPro that brought them together in a way which has defined the genre. The
latest and, of course, best is the GoPro Hero 7 Black.
GoPro Hero 7 features
The GoPro Hero 7 Black is of course entirely digital. But,
fun fact, did you know that the first GoPro was a 35mm still camera? That was
back in 2005, when digital sensors were still quite primitive. Only in the
following year did a digital one appear. Video capabilities? 320 by 240 pixels
for all of 10 seconds on its internal 32MB of storage.
Well, the current unit – the GoPro Hero 7 Black – can manage 3,840 by 2,160 pixels at up to 60 frames per second for as long as you can provide power and the storage media lasts. For fixed installations with external power, that can be hours. When relying on the included 1,220mAh, 4.4 volt battery, it depends on resolution and frame rate. At best it’s rated up to 90 minutes (at 1080p60 or 2160p30), at worst up to 50 minutes (at 2160p60). Spare batteries are available for $35.95, or $79.95 with a dual battery charger. Enthusiasts are going to have a handful of charged batteries in their kit.
The camera is tiny, of course. The official measurements are 62.3mm wide by 44.9mm tall by 33mm deep, including the lens housing. On the specifications page for the GoPro Hero 7 Black a paper clip is pictured as a size reference. The camera with card and battery installed weighs 115.7 grams. That makes it a little lighter than some of the main competition, although a difference of less than ten grams is unlikely to make much difference.
On the back is a 50mm touch-sensitive colour display. At the
front is a monochrome LCD display. The back one shows menus and, of course,
what the lens is seeing. It’s your main centre of control – apart from the
record button and the power/mode selection button. The front display shows
current video setting, battery state, recording time remaining on the card and
length of the current recording.
Of course, the GoPro Hero 7 Black is super portable. Apart from anything else, it’s rated to cope with immersion – and use – at depths of up to ten metres.
The standard for action cameras
GoPro has so dominated the action camera market that its two/three-lug mount has become standard. Indeed, certainother brands are provided with compatible frames. Of course, there are a wealth of attachments available for the GoPro Hero 7 Black from the company. Perusing the GoPro website, some of them look rather pricey. The “Pro Handlebar/Seatpost/Pole Mount” attachment, for example, costs $94.95.
But because they’ve become the industry standard, you can go third party. I already have a low-cost accessory-mounts pack so I was able to use its contents.
Included with the GoPro Hero 7 Black are two adhesive mounts
– one gently curved – and a clip-in mount with lugs atop it. Also provided with
the GoPro Hero 7 Black is a frame mount – it’s a tight fit getting the camera
in and out, but it’s doable – and a USB Type-C cable for charging and file
transfer. Apparently, you also get a free SD card with all GoPro Hero cameras.
The one included with the review unit was a 32GB SanDisk Extreme UHS-1 card
with a read speed of up to 100MB/s.
As is the way of these things: Documentation? Almost zero. Well,
a brief promo card for “Plus”, the GoPro damage replacement, cloud backup and
discount program. On the other side of that are a dozen graphics illustrating
things. There’s a card pointing you at gopro.com/answers for everything else.
Plus, the obligatory GoPro brand sticker (two of them!) and the substantial
“Important Product + Safety Instructions” booklet. I presume that’s required by
laws which are, of course, years behind the times.
Of course, the GoPro Hero 7 Black does more than just the “Insanely smooth 4K” touted on the promotional material. But that 4K really is remarkably smooth, as we’ll see. In part that’s due to the ability to record 4K at up to 60 frames per second. Remember, almost all cinema is shot at just 24 frames per second. The video 60p video from this camera is like looking at high quality content on a modern TV with motion smoothing switched on, except that there’s no distortion. There’s also a stabilisation system called “HyperSmooth”.
That 2160p60 is only available with the standard wide field
of view and 16:9 aspect ratio. Both 4:3 and “SuperView” are limited to 24 or 30
fps at UHD resolution. However, you can use the 2.7K resolution imaging at up
to 60p in both formats. And at up to 120fps as well.
You can produce ultra-smooth 1080p video at up to 240 frames
per second or go for 8x slow motion. 960p and 720p are also available.
Also, in the main settings you can set the camera to NTSC or
PAL. Those terms don’t really apply. They are merely shorthand for 60fps (and
its multiples) and 50fps (and its multiples). If you’re creating footage
intended for Australian TV you’ll want to choose the latter. Stuff shot at
30fps and 60fps does not translate smoothly to our frame rates.
You can also shoot vertically if that better suits your
subject or outlet, for example Instagram.
Photos are 12MP. You can choose the level of processing you
want, or even shoot RAW. Shutter speed is manually controllable if you really
want to get deep into the settings.
There are also “Protune” settings, even for video. Again,
you can control the shutter speed (within the limits of the frame rate, of
course) and adjust the level of processing. Just as importantly, you can have
the GoPro Hero 7 Black record the audio to a separate WAV file, again with
different levels of processing. All that stuff’s great for professional work.
There are plenty of other features. For example, voice
control, video looping, GPS tagging and live streaming via Wi-Fi. The GoPro app
allows you to control the camera and see what it’s seeing.
I mounted the GoPro Hero 7 Black on the head tube of my bike
using the frame clamp from my mount kit. Then I started it recording and went
for a few rides. Well, if you have resolutions of up to 2160p60 available, why
not use them?
The unit recorded up to 3.73GB per file, automatically
switching to a new file at that point. The sequential numbering was weird. The
files were numbered GX0[S]000[N].MP4, where [N] was the number of the session,
and [S] was the sequence of the file within the session. So standard
alphabetical/numerical sorting on your computer, and most other devices, will
result in all the first segments being played, followed by the second segments
and so on. It’s probably best to get the files off the card and into
thoughtfully named folders on your computer quickly while you remember what’s
For 2160p video, the GoPro Hero 7 Black uses the H.265 codec, otherwise known as HEVC. That’s the format used on UltraHD Blu-ray and its more efficient that the H.264 that the device uses for lower resolutions.
I watched the resulting footage on my computer, and while
sharp and clear, there were occasional odd artefacts in the video. But my
monitor isn’t a full UltraHD monitor, so I watched it on my 65-inch LG OLED TV
instead. That produced a very different result: smooth, detailed, unbelievable
The auto-exposure of the camera was nicely judged. At one
point I was passing through a tunnel under a road and the bright exit washed
out the picture briefly. But the camera clamped down smoothly and brought everything
back to the correct brightness. If I’m going to get super picky, at one point
the bitumen bike path looked as though it had some slightly laggy patches. Or
perhaps it was just posterised. The camera supports HDR, but that’s camera-style
HDR. It doesn’t give more bits to play with, so colour and brightness are
defined on an eight-bit scale. That can lead to darker elements being crushed
into a small range of colours. Posterisation gives a kind of
H.265, like H.264, compresses across time as well as
spatially, so that can lead to elements within a video losing timing with the
rest of the image. Rewatching the segment, though, I came to the view that it
was in only one specific part where the daylight was illuminating the path at a
particular angle. The appearance of lag seemed to really be colour and
brightness level-jumping through those eight bits rather than timing lags.
The only other visible defect was a brief moment of aliasing
on a road grate.
Those were the only two moments of imperfection I could see in
around twenty minutes of video. That video, incidentally, seemed to run at
between 50 and 70Mbps. The colour space used was BT.709, the same as Blu-ray.
The embedded audio was stereo AAC with 48kHz sampling.
Now there’s one other thing I must note about the video. Golly, talk about smooth. GoPro calls its “HyperSmooth” process “Insanely smooth”. I can’t disagree. My bike is an old racing-style road bike. It has thin tyres which are pumped up to high pressure. There are no concessions to comfort. The audio is accompanied by the sound of the bike’s aluminium stand frequently shaking hard against its spring as I go over bumps. My journey took me over surfaces with plenty of medium sized bumps, cracks between segments of concrete paths, and sections of very roughly finished bitumen.
And throughout the image looked steady. Even in the slow,
uphill bits where the bike was leaning from side to side in sympathy with my
pedalling, the camera maintained a steady horizon. It was the handlebars,
caught at the edges of the picture, jumping and writhing from the vibrations
and course corrections.
It really was a remarkable performance.
The GoPro Hero 7 has a mini-HDMI output and a USB Type-C
socket. The latter is for charging and for file transfer.
So, how fast was the USB Type-C connection? When I had three video clips amounting to 4.91GB in size – that 4K stuff chews up data fast! – I copied it to the SSD in Surface Pro 2017 via a USB 3.0-rated cable. It took 1 minute and 23 seconds to transfer the data. That works out to over 60 megabytes per second. I can get 90MB/s using my fast card reader, but it hardly seemed worth the bother of popping out the card for a fifty per cent speed increase.
Clearly GoPro hasn’t been merely resting on its reputation.
With the GoPro Hero 7 Black, it’s working hard to keep itself at the top of the
class. And it’s managing it.