Originally posted by Lakai question :
is it wise to use and wear your precious FF sensor that almost costs short of the camera‘s price for video? I mean if you have a $3000 dslr dedicated for high quality stills and capable of recording good videos would you wear your sensor for video ? I you ask me I won t. I bought my k5 because i want to learn photography not videography and if i want to become one ill buy a cam designed and intended for video. adding video on dslr is cute and trivial but missing one wont hurt a photo entusiast. Keeping in mind that this thread is about CHEAP ff cam and not the pricey featured dslr. yes video is just a software based feature but a good video wont happen in a ff sensor with a cheap and so so processing engine.
You won't wear the sensor out when recording. At the very most you wear out the battery, but mine is in great shape, despite being drained frequently with video.
Dedicated video cameras with the quality and control over the image that DSLRs have cost 10k and more, and that is for APS-C. I don't think there exists a professional FF video camera. So video is a very valid option. Especially for those who want to do both... carrying 2 cameras seems unnecessary. A photo journalist who also has to grab a video for his companies website won't be taking out another camera. He'll flick a switch.
You are right that good processing is necessary, but that will come anyway as the processors are getting better and better. It is also important for good still performance. And good quality (not super high frame rates etc.) is possible with a new Nikon, even their entry level DSLRs. Nikon uses more or less the same CPUs as Pentax. All that would be nice would be for Pentax to make full use of the existing hardware. If it means MJPEG for the highest quality setting because the h264 implementation isn't good enough, so be it. Just don't hold back anything because it might confuse users, or because there may be some drawback to it. If they did the same on the stills side there'd be no raw, no manual settings, no ISO above 800, ...
And where is the relation to cheap cameras? The more people buy the camera, the cheaper it gets. Development cost gets spread out, parts get cheaper, ... and it is the video world that is more likely to switch brands because a competing product is better. Also it just belongs on a professional (non MF) camera, as some professionals need to do both.
Focus peaking is more of a video feature. It relies on the camera being able to record video and the processor being able to process it.