Knocking noise and geschummelte resolution at 1080 120fps :-( Good image quality at 4K

Knocking noise and geschummelte resolution at 1080 120fps :-( Good image quality at 4K

GoPro Action Camera Hero4, Black Adventure (Electronics)

Customer Review

(-) Knocking noise:

Apparently many GoPro still ship HERO4 cameras that are not adequately shielded. Then the camera bothers itself when the built-in WiFi antenna is active. Whether you use the GoPro App or the original GoPro remote control: in quiet environments you can hear clearly knocker 9.7 per second. That sounds like a distant helicopter. Of not only the Black but also the Siver is affected. Numerous videos and postings of clients with the same problem I have found.

Since my camera sometimes when the WiFi records no noise, I suspect a sloppy shield with loose contacts. In the high frequencies, the electrical shielding must be really tight. A fine gap is enough already, and the Faraday cage is leaking.

Listen to the problem itself on!
Here's a video with different juxtaposed clips:
[.....]

In some shots you do not hear the noise, others. Where the faults are not to listen, you can hear clear noise. This is not a quality characteristic for the top model of the GoPro nearly 500 costs.

(-) Geschummelte resolution 120fps at 1080:

Mainly I bought the camera to (120 fps) at Full-HD resolution record (1080) with a high refresh rate for me to get beautiful slow motion.

The actual resolution is considerably lower than full HD. If you film only at 30 fps, adjusts the resolution. At the high repetition rate the GoPro developers have 1080 probably failed. I suspect that will be filmed at half the resolution, and the pixels are doubled before saving. In my eyes a Kundenverarschung. So as would advertise an automaker that a vehicle 200 km / h fast, and the customer realize that this mountain will only work with 100 km / h tailwind down.

Noticeable Endorses the low resolution especially at the edges. As can be clearly seen stairs. The same motif also filmed in 1080 but only at 30 fps, and the edges are no longer stage but nice and smooth. The image is also sharper, better at 30 fps, so as with the Hero3. In this issue I have the hope that they will actually be filmed in 1080 @ 120fps after a firmware update. Perhaps GoPro raises the also for HERO4 plus.

(-) After ready tone when you turn not yet ready to receive:

In standby the HERO4 consumes a lot of electricity. Therefore, I turn it off whenever I do not movies. In order to serve you blind when it is mounted on the helmet, for example, they reported by beeps after power, whether it is booted. Unfortunately, it announces readiness, though it is not yet ready. So some shots I have already been lost. You have to slowly count to four after the ready tone, only then you can shoot movies or photos.

(-) Slow boot:

Without remote control you have ~ 6 seconds after switching on wait until you can take a photo or video. If they are operated via WiFi remote control, you have to wait even 10 to 15 seconds. Transient things are then already over. Be permanently standby does not even work because they consume about the same amount of power as if you were filming.

(-) No image stabilization:

Supposedly built in the Black HERO4 the Ambarella SoC A9 processor:
[.....]

This SoC has integrated an image stabilizer. One could thus save the compute-intensive Entwackeln with the editing program. Unfortunately GoPro does not use these built-in function. Either the firmware is not finished, or GoPro stands out this function for the HERO4 plus on. Artificial Castration of marketing considerations so.

(+) Image quality at 4K, 30 fps:

Although there is no 4K resolution, but the slightly lower Ultra-HD resolution, convinced me the HERO4 Black in this setting, in terms of image quality. Ultra-HD has a resolution of 3840 x 2160 pixels. So this is the number of pixels as viefache Full HD (1920 x 1080). 4K have 4096 x 2160 pixels.

I film in Protune and unlock all Bildverhübschungen (colors, sharpness) and automation (white balance) of the camera. So the HERO4 stores almost unchanged, which comes from the CCD, and I have all the freedom later in the editing program. The high resolution I can subsequently zooming and panning, and indeed much more evenly and more accurately than would be possible with an ordinary zoom lens.

(---- +) Conclusion:

The GoPro's have always been banana products:

Immature they are sent and then mature for months through updates to the customer. That was so far in all GoPro cameras that. The Hero3 Black is initially crashed my example again. At the water kitesurfing I had to time open the middle of the water, remove the battery and reinstall in short's housing, so that they work again. Better to wait until the current model is at 1 year on the market and buys it only.

Whether the audio problem can be solved by firmware update tidy I doubt. Either the developer unscrew the WiFi transmit power down much, then the range will be miserable. Or they filter out clicks via software. This will distort quiet recordings. Or fit an squelch. Then they will faint sounds can no longer record.

Who does not need the sound recording, or the camera remotely controls, also the full HD slow motion 120 fps is not needed, but in ultra-HD want to film at 30 fps, is the HERO4 black, as it is often delivered satisfied.

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