After shooting some footage with my new Blackmagic Production Camera 4K I've noticed some unpleasant white hot pixels all over the image. They showed up in lowlight but also in correctly exposed (untouched) daylight clips. Somewhere in an old post I've read that a firmware down- & upgrade may help but there was no confirmation by anyone. Don't know but seems like it was forgotten. Anyway for others with the same problem try it. For me it worked really good!
Blackmagic Production Camera 4K (don't know if that works with other BMD cameras too)
This is exactly what I've done:
1. Take out the SSD and take off the lens.
2. Put the Camera Body Cap on.
3. Connect the power adapter to the camera.
2. Downgrade the Firmware to 1.8
3. Upgrade the Firmware to 1.9.8
See the before & after 1:1 crop above. I don't know if the camera triggers an undocumented internal pixel mapping but the hot pixels are gone and the overall image is now much better! Thats awesome - though I don't know how long it will stay that way. I will see :-)
If that didn't worked for you then there is still an easy workaround directly in DaVinci Resolve:
1. Create a node with a Power Window and resize it to 1.0 and set Soft1 to 0.00
2. Zoom in and move the Power Window directly above the hot pixel.
3. Got to the Blur Palette Effects and set the Radius of the Blur slider to 0.53
4. If you positioned the Power Window directly above the hot pixel it should be gone now.
5. If not try to reposition the Power Window.
6. For each hot pixel create a new node then copy and paste the Power Window. Reposition it on the next hot pixel and so on ...
7. Create a PowerGrade from the whole node structure and use it on other clips with hot pixels.
These new powerful DIGIC 5+ image processors can handle almost any task that you give to them - in realtime. They’re built in the 5D Mark III, EOS-1DX and the soon available 4K EOS-1DC DSLR with 8bit 4:2:2 1080p HDMI output. This makes me think that the Canon management told their engineers to cripple the power of the lower end DSLRs like the EOS-1DX, 5D Mark III, 650D by using only a different software. The hardware parts are almost the same if you check the specifications (besides the CMOS sensors). With this faster DIGIC 5+ image processor it should be possible to gain more (or real 1080p) resolution (like the Panasonic GH2) from a 5D Mark III by optimizing the intentionally crippled downscale algorithm.
With the 5D Mark II they introduced line-skipping because the processor was not fast enough to handle the stream of data. Now they advertise the new 5D Mark III does not use line-skipping anymore.
When I see what Magic Lantern has succeeded with their (v2.3 RC2) so far, that we never thought it was possible I can imagine that some very talented programmers could also implement a MPEG variant XF 422 codec at 50Mbit in a 5D Mark III.
The future arrived! Let’s see what happens in the next couple of months :-)